GREEN SOLUTION TECHNOLOGY CO., LTD. Patent applications |
Patent application number | Title | Published |
20150263619 | BUCK CONVERTING CONTROLLER - A buck converting controller, adapted to control a DC-DC buck converting circuit to convert an input voltage into an output voltage, is disclosed. The buck converting controller comprises a feedback control circuit, an off-time determination circuit and a load control circuit. The feedback control circuit turns on and off a high-side transistor and a low-side transistor of the DC-DC buck converting circuit in response to a feedback signal indicative of the output voltage. The off-time determination circuit determines a preset off-time period according to the input voltage and the output voltage and generates an off notice signal according to the preset off-time period. The load control circuit is coupled to the DC-DC buck converting circuit and determines whether to release an electronic energy stored in the DC-DC buck converting circuit according to the off notice signal. | 09-17-2015 |
20150214839 | CONSTANT ON TIME CONTROLLER - The present invention provides a constant on time controller packaged in one single package for controlling a buck converting circuit to convert an input voltage into an output voltage. The constant on time controller includes an input voltage detecting circuit, an on-time determining circuit and a driving circuit. The input voltage detecting circuit receives a bootstrap voltage to generate an input voltage detecting signal indicative of the input voltage. The on-time determining circuit receives the input voltage detecting signal and generates an on-time signal in response to the input voltage detecting signal and the output voltage. The driving circuit controls the buck converting circuit according to the n-time signal. | 07-30-2015 |
20150130428 | LEVEL SHIFT CIRCUIT AND DC-DC CONVERTER FOR USING THE SAME - A level shift circuit and a DC-DC buck converter controller for using the same are disclosed. The level shift circuit is capable of detecting a state of a converting circuit, and avoids a current leakage when determining that the converting circuit is operating under a light-load. Therefore, the level shift circuit and the DC-DC converting controller provided by the present invention can reduce power consumption under the light-load and have power-saving advantage. | 05-14-2015 |
20150115818 | LED DRIVING CIRCUIT - A LED (Light-Emitting Diode) driving circuit including at least one light-emitting unit and a protection detecting circuit, is provided. Each light-emitting unit includes an LED string coupled to a driving voltage, a current regulator and a transistor. The current regulator is coupled to a corresponding LED string and controls a current flowing therethrough. The transistor is coupled between the LED string and the current regulator. The protection detecting circuit generates a clamping reference level signal to a control terminal of the at least one transistor and is coupled to a connection node of the at least one transistor and the at least one LED string. When a voltage of any connection node is higher than a preset protection value, the protection detecting circuit decreases the clamping reference value to reduce or cut off the current of the at least one LED string. | 04-30-2015 |
20140333217 | FEEDBACK CONTROL CIRCUIT AND LED DRIVING CIRCUIT - A feedback control circuit, adapted to control a converting circuit to transform an input power into an output voltage for driving an LED module. The feedback control circuit comprises a detection circuit, a PWM circuit, a PWM logic control circuit and a PWM control circuit. The detection circuit is coupled to at least one LED string of the LED module and generates at least one detection signal. The PWM circuit comprises a capacitance, a charging circuit and a discharging circuit, and determines a capacitance voltage of the capacitance to increase, decrease, or maintain. The PWM logic control circuit compares a level of the least one detection signal with a high reference level and a low reference level to control the PWM circuit to adjust the capacitance voltage. The PWM control circuit controls the converting circuit to execute the power transformation in response to the capacitance voltage of the capacitance. | 11-13-2014 |
20140327423 | DC-DC CONVERTER CONTROLLER - In a DC-DC converter controller of the present invention, a ramp voltage for compensating a reference voltage is designed to have the same valley value or peak value irrespective of an input voltage and an output voltage of a controlled converting circuit when the controlled converting circuit operates in the steady state. Hence, the DC-DC converter controller of the present invention is capable of controlling the controlled converting circuit to accurately output the output voltage in different applications. | 11-06-2014 |
20140292291 | MULTIPHASE CONVERTING CONTROLLER - A multiphase converting controller, adapted to control a plural converting circuits coupled to an input voltage to commonly supply an output voltage, is disclosed. The multiphase converting controller comprises a feedback control circuit, an on-time control circuit, and a multiphase logic control circuit. The feedback control circuit determines a conduction starting point in time according to the output voltage and accordingly generates a conduction signal. The on-time control circuit determines a conduction time period. The multiphase logic control circuit controls the plural converting circuit in sequence in accordance to the conduction signal and the conduction time period. The on-time control circuit adjusts a length of the conduction time period according to a mode signal. | 10-02-2014 |
20140266111 | MULTIPHASE CONVERTER CONTROLLER WITH CURRENT BALANCE - A multiphase converter controller with current balance, configured to control a plural converting circuit to commonly supply an output voltage, is disclosed. The multiphase converter controller comprises a feedback circuit, a fixed on-time circuit, and a multiphase logical circuit. The feedback circuit detects the output voltage to generate a feedback control signal. The fixed on-time circuit generates an on-time signal according to the feedback control signal, and a pulse width of the on-time signal is determined according to a single timer. The multiphase logical circuit chooses a corresponding converting circuit, generates a phase signal according to a sequence of the feedback control signal and controls the corresponding converting circuit according to the on-time signal. Wherein, the fixed on-time circuit determines a correction value according to currents of the plural converting circuit and the phase signal, so as to correct the pulse width of the on-time signal. | 09-18-2014 |
20140197812 | CONSTANT ON TIME CONTROL CIRCUIT AND DC-DC CONVERTING CIRCUIT - A constant on time control circuit, configured to control a converting circuit to transform an input voltage into a stable output voltage, is disclosed. The constant on time control circuit comprises a comparing circuit and a logic circuit. The comparing circuit compares a reference signal and a voltage signal indicative of the output voltage and accordingly outputs a compared result signal. The logic circuit periodically controls the converting circuit to perform voltage transformation and makes a time period of a duty cycle in every cycle being substantially constant. A start point in time of every cycle is determined according to the compared result signal. The comparing circuit comprises a differential pair, a base current source and an extra current source. The base current source provides a bias current to the differential pair. The extra current source provides a substantial ramp current to one channel in the differential pair. | 07-17-2014 |
20140197808 | DC-DC CONVERTER - A DC-DC converter, adapted to control a converting circuit to convert an input voltage into an output voltage, is disclosed. The converting circuit comprises a switch module and an LC filter, the switch module is coupled to the input voltage, and the LC filter is coupled to the switch module and provides the output voltage. The DC-DC converter comprises a system control circuit, a driver circuit, and an output voltage adjusting circuit. The system control circuit generates a switch control signal according to a reference voltage and a state of the LC filter. The driver circuit controls the switch module according to the switch control signal for adjusting the output voltage in response to the reference voltage. The output voltage adjusting circuit determines whether adjusting the output voltage toward a predetermined adjusting voltage according to an adjusting reference voltage and a detecting voltage indicative of the output voltage. | 07-17-2014 |
20140152274 | CONTROLLER WITH PROTECTION FUNCTION - A controller with protection function, comprising a feedback circuit, a logic control circuit, an over-state judgment circuit, and a protection control circuit, is disclosed. The feedback circuit generates a modulation signal according to an output of a converting circuit. The logic control circuit is coupled to the feedback circuit and controls the converting circuit according to the modulation signal for stabilizing the output of the converting circuit. The over-state judgment circuit receives an over-state reference signal and a detecting signal, and generates a protection signal in response to levels of the detecting signal and the over-state reference signal. The protection control circuit is coupled to the logic control circuit and the over-state judgment circuit and controls the logic control circuit to lower the output of the converting circuit when receiving the protection signal. | 06-05-2014 |
20140103896 | DC TO DC BUCK CONVERTING CONTROLLER WITH PROGRAMMABLE ON-TIME PERIOD UNIT - A programmable on-time period of a DC to DC buck converting controller is adjusted according to a level of a preset output voltage or a reference signal. Therefore, the DC to DC buck converting controller of the present invention is suitable for any applications with different requests of output voltages or different operating mode. | 04-17-2014 |
20140062428 | FEEDBACK DETECTION CIRCUIT - Disclosed is a feedback detection circuit, adapted to provide a feedback detection signal wherein a converting circuit provides a driving power source to drive a load according to the feedback detection signal. The feedback detection circuit comprises an operational conversion circuit and a signal limitation circuit. The operational conversion circuit generates the feedback detection signal in response to a level of a detected node of the load. The operational conversion circuit has an operational amplifier, which modulates the level of the feedback detection signal in response to the level of the detected node. The signal limitation circuit is coupled to the operational conversion circuit for clamping a level rang of the feedback detection signal. | 03-06-2014 |
20130314027 | BATTERY BALANCE CIRCUIT - A battery balance circuit is adapted to balance battery voltages among a plurality of battery cells. The battery balance circuit is enabled to perform a battery balance process when the battery cells are charged, and is disabled when one of the batter cells is fully charged or the battery cells are un-charged. | 11-28-2013 |
20130301178 | Control Circuit and Synchronous Protection Control System - A control circuit, comprising a protection detection circuit, a protection synchronous output circuit, a protection synchronous input circuit and a protection circuit, is provided. The protection detection circuit is adapted to generate an error notice signal when detecting an error condition. The protection synchronous output circuit is coupled to the protection detection circuit far enabling a level of a protection synchronous pin to be a protection level when receiving the error notice signal. The protection synchronous input circuit is coupled to the protection synchronous pin for generating a synchronous protection signal when the level of the protection synchronous pin has been at the protection level for a predetermined time period. The protection circuit generates a protection signal to make the control circuit enter a protection mode when receiving one of the error notice signal and the synchronous protection signal. | 11-14-2013 |
20130271097 | CONTROLLER AND CONVERTING CONTROLLER WITH MULTI-FUNCTION PIN - A controller with a multi-function pin, adapted to control a converting circuit according to a control signal for converting an input voltage into an output voltage, is disclosed. The controller has the multi-function pin, an enable unit, an over-current detecting unit and a logic control unit. The enable unit is coupled to the multi-function pin for receiving an enable signal and activates the controller in response to the enable signal. The over-current detecting is coupled to the multi-function pin and determines an over-current value according to an over-current set resistance coupled between the multi-function pin and a voltage source. The over-current detecting unit generates an over-current protection signal according to the over-current value and a current flowing through the converting circuit. The logic control unit determines whether executing an over-current protection according to the over-current protection signal. | 10-17-2013 |
20130271006 | LED Driving Circuit - An LED driving circuit comprises a converting circuit, a current regulator, a converting controller and a low dimming protection blocking circuit, is disclosed. The converting circuit is adapted to perform a power conversion to provide a driving voltage for lighting an LED module. The current regulator is coupled to the LED module for regulating a current flowing through the LED module. The current regulator conducts and stops conducting the current flowing through the LED module according to a dimming signal, and executes a protection process when the LED module operates abnormal. The converting controller controls the power conversion of the converting circuit according to a voltage level of at least one connection node of the current regulator and the LED module. The low dimming protection blocking circuit stops the protection process of the current regulator when the driving voltage is lower than a predetermined value. | 10-17-2013 |
20130175869 | POWER-GOOD SIGNAL GENERATOR AND CONTROLLER WITH POWER SEQUENCING FREE - A power-good signal generator generates a power-good signal according to a control signal of a controller, and comprises an impedance element, a controlled transistor and a power sequencing free circuit. An end of the impedance element is coupled to a second voltage source. The controlled transistor has first and second input/output ends and a controlled end, wherein the first input/output end is coupled to the other end of the impedance element to generate the power-good signal. An operating state of the controlled transistor is changed in response to the control signal. The power sequencing free circuit is coupled to the controlled end and one of the first input/output end and the second voltage source. When the second voltage source is supplied before the first voltage source, the power sequencing free circuit turns on the controlled transistor to clamp the power-good signal to be lower than a predetermined voltage level. | 07-11-2013 |
20130169249 | MULTI-PHASE DC-DC CONVERTER AND METHOD OF CONTROLLING THE SAME - A multi-phase DC-DC converter and a method of controlling a multi-phase DC-DC converter are disclosed. The multi-phase DC-DC converter is adapted to control a plurality of channels in a multi-phase DC-DC converting circuit for providing an output voltage. The multi-phase DC-DC converter comprises a constant on unit, a plurality of PWM units and a pulse width logic unit. The constant on unit determines a time point of generating a turning on signal indicative of a preset time period according to the output voltage. Each PWM unit generates a PWM signal, and a pulse width thereof is determined according to the turning on signal and currents of the channels. The pulse width logic unit controls the channels according to the corresponding PWM signals generated by the plurality of PWM units. | 07-04-2013 |
20130121037 | Resonant Converting Circuit and Resonant Controller - A current detecting circuit detects a resonant current in a primary side of a resonant converting circuit to generate a current detecting signal. An output detecting circuit generates a feedback signal according to the output voltage. A resonant controller generates a clock signal and adjusts an operating frequency of the clock signal in response to the feedback signal for modulating the output voltage of the resonant circuit. The resonant controller includes a resonance deviation protection unit which detects the current detecting signal according to a phase of the clock signal to determine whether the resonant circuit enters a region of zero current switching or not. When the resonant circuit enters the region of zero current switching, the resonant controller executes a corresponding protection process in response to that the resonant controller operates in a starting mode or a normal operating mode. | 05-16-2013 |
20130121036 | RESONANT CONVERTING CIRCUIT AND RESONANT CONTROLLER - The resonant converting circuit comprises a resonant circuit, a current detecting circuit and the resonant controller. The resonant controller controls a power conversion of the resonant circuit for converting an input voltage into an output voltage and the resonant controller comprises an over current judgment unit and an over current protection unit. The over current judgment unit determines whether the resonant current is higher than an over current value according to a current detecting signal generated by the current detecting circuit. The over current protection unit generates a protection signal in response to a determined result of the over current judgment unit and an indication signal indicative of an operating state of the resonant controller. The resonant controller executes a corresponding protecting process in response to the protection signal. | 05-16-2013 |
20130119895 | LED DRIVING CIRCUIT AND DRIVING CONTROLLER FOR CONTROLLING THE SAME - A driving controller for driving a load is disclosed. The driving circuit includes a driving power supply and the driving controller. The driving power supply provides a first power source to the load. The controller is coupled to a second power source to receive an electric power for operating. The controller controls the amount of the electric power to the load when operating in a first mode and stops the driving power supply from providing the electric power to the load when operating in a second mode. The controller operates exclusively in the first mode before the driving power supply provides the first power source to the load. | 05-16-2013 |
20130107411 | DRIVING CIRCUIT WITH OUTPUT PROTECTION AND DRIVING PROTECTION CIRCUIT APPLIED TO THE SAME | 05-02-2013 |
20130009547 | LED DRIVING CIRCUIT WITH OPEN-CIRCUIT PROTECTION - An LED driving circuit with open-circuit protection is disclosed. The LED driving circuit pulls down an operation voltage supplied to a converting controller of the LED driving circuit when a voltage across an LED module of the LED driving circuit is too high, so as to stop the converting controller operating and further latch the converting controller at the protection state until that the converting controller is restarted or the condition of the voltage supplied to the LED module being too high is solved. | 01-10-2013 |
20120319754 | TRANSISTOR SWITCH CONTROL CIRCUIT - A synchronous driving circuit in the arts may cause a short through pheromone when a duty cycle of a duty cycle control signal is too short. The present invention sets a delay time with a suitable period when the duty cycle of the duty cycle control signal is too short to avoid the short through phenomenon. | 12-20-2012 |
20120286667 | LED DRIVING CIRCUIT AND PROTECTING CIRCUIT THEREOF - An LED driving circuit for driving an LED module is provided. The LED module is coupled to an inductor and a flywheel unit to provide a continuous current conduction of the inductor. A terminal of a converting switch is coupled to the LED module, and another terminal thereof is coupled to ground through a current detection unit that generates a current feedback signal to a controller, so as to stabilize a current flowing through the LED module. The LED driving circuit also includes a protecting circuit, which detects a potential of one end of the LED module to generate a detection signal and makes/has the converting switch to be turned off responsive to the detection signal. If the converting switch is turned off, driving of the LED module is stopped. | 11-15-2012 |
20120274294 | CONTROLLER FOR CONVERTING CIRCUIT - A control circuit adapted to a DC-DC converting circuit is disclosed. The controller comprises a reference voltage generator, a reference voltage adjusting circuit, a feedback circuit and a driving circuit. The reference voltage adjusting circuit generates an adjusted reference voltage according to a reference voltage generated by the reference voltage generator. The feedback circuit generates a feedback control signal according to the adjusted reference voltage and the feedback signal. The driving circuit generates at least one control signal for controlling the converting circuit according to the feedback control signal. | 11-01-2012 |
20120274235 | Power Converting Circuit and Converting Controller - A converting controller, adapted to control a converting circuit to convert an electric power from an input power source, is provided. The controller comprises a duty cycle control unit, a protection enabling control unit and a protection unit. The duty cycle control unit controls the converting circuit according to a feedback signal for converting the electric power from the input power. The protection enabling control unit outputs protection enabling signals according to time results of a timing circuit. The protection unit detects the converting circuit and generates a protection signal when any circuit error is determined, so as to stop the duty cycle control unit, wherein the protection unit has a plurality of protection functions and enables the protection functions with respect to the protection enabling signals, respectively. | 11-01-2012 |
20120268088 | DC TO DC BUCK CONVERTING CONTROLLER - A constant on-time period of a DC to DC buck converting controller is adjusted according to a level of a preset output voltage. Therefore, the DC to DC buck converting controller of the present invention is suitable for any applications with different requests of output voltages or different operating mode. | 10-25-2012 |
20120268085 | POWER CONVERTING CIRCUIT AND FEEDBACK CONTROL CIRCUIT - A power converting circuit and a feedback control circuit for the power converting circuit are disclosed. The feedback control circuit comprises a feedback controller and a level controlling unit. The feedback controller generates a feedback control signal according to a reference voltage signal and a feedback signal. The level controlling unit receives one of the reference voltage signal and the feedback signal and modules a level of the received signal from a first level to a second level with time according to a level adjusting signal. | 10-25-2012 |
20120268011 | LED DRIVING CIRCUIT - An LED driving circuit includes a first and a second LED modules, a first and a second switching converters, an extreme voltage detecting and selecting circuit, a current balance circuit and a controller. The first switching converter transforms electric power of an input power supply into a first output voltage for lighting the first LED module. The second switching converter transforms electric power of the input power supply into a second output voltage for lighting the second LED module. The current balance circuit balances the currents flowing through the first and the second LED modules. The extreme voltage detecting and selecting circuit detects the first and the second LED modules and selects to output one of detecting results. The controller controls the transforming of the first switching converter and the second switching converter to light the first and the second LED modules in response to the outputted detecting result. | 10-25-2012 |
20120242249 | Controller and LED driving circuit with protection function - A controller with protection function, for controlling a transistor having a control terminal, a first terminal coupled to a load, a second terminal, is disclosed. The controller comprises a judgment unit and a current control unit. The judgment unit is coupled to the transistor and generates a current reducing signal when a potential of the first terminal of the transistor or a voltage difference between the first terminal and the second terminal of the transistor is higher than a preset value. The current control unit is coupled to the control terminal of the transistor for substantially stabilizing the current flowing through the transistor at a preset current value, and reduces the current flowing from the preset current value when receiving the current reducing signal. | 09-27-2012 |
20120235570 | LED DRIVING CIRCUIT AND LED DRIVING CONTROLLER - The present invention discloses an LED driving circuit and controller, capable of maintaining an average value of a current flowing through an LED module at a predetermined current value. The LED driving circuit and controller compensates influences of any factors deviating the average value of the current flowing through the LED module by modulating a period of constant on time or constant off time, or by modulating the determining value(s) of current peak value and/or current valley value according to a difference between an actual average value and the preset current value. | 09-20-2012 |
20120229050 | CONVERTING CONTROLLER - A converting controller is provided and comprises a first comparing unit, a second comparing unit, a duty cycle operating unit and a reference voltage supplying unit. The first comparing unit receives a detecting signal representing a state of the load and a first reference signal, and generates a first comparing signal accordingly. The duty cycle operating unit controls power conversion of the converting circuit according to the first comparing signal. The second comparing unit receives the detecting signal and a second reference signal, and generates a second comparing signal accordingly. The reference voltage supplying unit supplies the first reference signal and adjusts a level of the first reference signal in response to the second comparing signal. | 09-13-2012 |
20120229034 | DRIVING CONTROLLER AND FULL-BRIDGE CONVERTING CIRCUIT - The present invention provides a full-bridge driving controller and a full-bridge converting circuit, which have the function of soft switch, to provide a DC output voltage. The present invention employs a resonant unit to oscillate the current flowing through the converting circuit at a resonant frequency. The full-bridge driving controller switches four full-bridge transistor switches at an operating frequency higher than the resonant frequency, so as to achieve the function of soft switch. | 09-13-2012 |
20120229031 | Converting Controller - A converting controller comprises a power pin, a ground pin, at least one input pin, at least one output pin, at least one set pin and a failure generating circuit. The power pin is adapted to be coupled with a power source to receive electric power for operation, and the ground pin is adapted to be grounded. The input pin is adapted to receive a corresponding input signal and the output pin is used to output a corresponding output signal. The set pin is adapted to set a corresponding operating parameter of the converting controller. The failure generating circuit is coupled with and uses one of the input pin and the set pin as a protection output pin. The failure generating circuit modulates the level of the protection output pin to be a protection logic level when the converting controller is under a protection state. | 09-13-2012 |
20120223644 | LED DRIVING CIRCUIT AND SHORT-CIRCUIT PROTECTION CIRCUIT - An LED driving circuit, adapted to drive an LED module, is disclosed. The LED driving circuit comprises a converting circuit, a converting controller, and a short-circuit protection circuit. The converting circuit, having a capacitor coupled to the LED module, is coupled to an input power source to proceed converting operation to supply an output current for driving the LED module. The converting controller controls the converting circuit to provide a stable current flowing through the LED module. The short-circuit protection circuit is coupled to the LED module in series and cuts the current flowing through the LED module off when detecting that the current higher than a current protection value. | 09-06-2012 |
20120176050 | LED DRIVING CONTROL CIRCUIT AND LED DRIVING CIRCUIT - The present invention provides an LED (Light-Emitting Diode) driving control circuit for controlling a converting circuit to transform an input power source into an output voltage for driving an LED module. The LED module has a plurality of LED strings. The LED driving control circuit includes a voltage detecting circuit and a feedback control circuit. The voltage detecting circuit has a plurality of detection circuits, and each detection circuit is coupled to a terminal of the corresponding LED string to determine whether a voltage of the terminal is higher or lower than a preset value. The voltage detecting circuit generates a feedback signal according to the determination results. The feedback control circuit controls the converting circuit to modulate the output voltage according to the feedback signal. | 07-12-2012 |
20120176048 | LED DRIVING CIRCUIT AND FEEDBACK CONTROL CIRCUIT THEREOF - An LED (Light-Emitting Diode) driving circuit to drive an LED module is provided. The LED driving circuit includes a converting circuit and a feedback control circuit. The converting circuit is coupled to the LED module, and converts an input voltage into an output voltage according to at least one control signal. The feedback control circuit generates the control signal to control the converting circuit to perform voltage conversion according to a feedback signal. In addition, the feedback control circuit receives a dimming signal, and is operated in a first state or a second state in response to the dimming signal, wherein the feedback control circuit adjusts the duty cycle of the control signal to have the duty cycle larger than or equal to a predetermined duty cycle in a predetermined period right after the feedback control circuit is operated from the second state to the first state. | 07-12-2012 |
20120126384 | PACKAGE STRUCTURE - The present invention employs tie bar(s) of a lead frame as contact(s) so as to increase the number of contacts in a package structure. Therefore, a die can be packaged in a package structure with a smaller dimension to lower packaging cost of an integrated circuit. | 05-24-2012 |
20120112646 | CONVERTING CONTROL CIRCUIT - A converting control circuit, adapted to control a converting circuit to convert an input voltage into an output voltage for driving a load, is provided. The converting control circuit comprises a current control circuit, a first detecting circuit, a second detecting circuit, a feedback controller and a feedback circuit. The current control circuit comprises at least one control end coupled to the load to adjust a current flowing through the load. The first detecting circuit is coupled to the current control circuit and generates a first detecting signal according to the voltage at the least one control end. The second detecting signal is coupled to the converting circuit and generates a second detecting signal according to the output voltage. The feedback circuit is coupled to the first and second detecting circuit and modulates a level of the second signal according to the first detecting signal. | 05-10-2012 |
20120112645 | FEEDBACK CONTROL CIRCUIT AND LED DRIVING CIRCUIT - The present invention provides a feedback control circuit and an LED driving circuit for using the same, wherein the feedback control circuit receives a dimming signal. The dimming signal is changed between a first state and a second state. When being in the first state, the feedback control circuit controls a converter circuit to drive the LED module for lighting stably. When being in the second state, the feedback control circuit controls the converter circuit to maintain the power conversion of the converter circuit to have an output voltage outputted by the converter circuit maintained at a level close to a lighting threshold voltage of the LED module. | 05-10-2012 |
20120106013 | CURRENT SENSE CIRCUIT AND BATTERY OVER-CURRENT PROTECTION CONTROLLER - A battery over-current protection controller includes a current sense circuit, a first pin coupled to one end of the current detection circuit, a second pin, and a third pin. The second pin and the third pin are respectively coupled to a positive end and a negative end of a battery module. The current sense circuit includes a reference voltage generation unit, a voltage dividing unit, and a comparison unit. The reference voltage generation unit is coupled between the second pin and the third pin to generate a reference voltage. The voltage dividing unit has one end coupled to the reference voltage to thereby generate a voltage dividing signal. The comparison unit receives the voltage dividing signal and a current detection signal indicative of a value of a current flowing through the current detection circuit to thereby generate an over-current protection signal when the current is greater than the predetermined current. | 05-03-2012 |
20120106008 | SPIKE SUPPRESSION CIRCUIT AND CONVERSION CONTROL CIRCUIT - A spike suppression circuit for filtering out voltage oscillation produced by an inductive component and a conversion control circuit are disclosed. The spike suppression circuit includes an energy release path and a detection circuit. One end of the energy release path is coupled to a connection terminal of a circuit, and the other end thereof is coupled to a reference voltage. The detection circuit is coupled to the connection terminal. The detection circuit has a high-pass component for turning on the energy release path when the voltage on the connection terminal has a high-frequency signal. | 05-03-2012 |
20120104968 | POWER CONVERTING CONTROLLER AND LIGHT-EMITTING DIODE DRIVING CIRCUIT - A power converting controller and an LED driving circuit are provided. The power converting controller controls a converting circuit, which converts an input power source into an appropriate power source to drive a load. The power converting controller includes a feedback control unit, an open-circuit judging unit and a protection unit. The feedback control unit controls the converting circuit according to a feedback signal representing the status of the load. As the open-circuit judging unit has judged that the load is continuously in an open-circuit status for a predetermined time length, the open-circuit judging unit generates an open-circuit protection signal. The protection unit is coupled to the feedback control unit and the open-circuit judging unit so as to generate a protection signal as receiving the open-circuit protection signal and thereby the feedback control unit enters a latch status to stop controlling the converting circuit. | 05-03-2012 |
20120104967 | NON-LINEAR LOAD DRIVING CIRCUIT AND CONTROLLER - A non-linear load driving circuit and a controller for controlling a conversion circuit to drive a non-linear load are provided. The controller includes a feedback unit, a pulse width control unit, and an overshoot reduction unit. The feedback unit generates a feedback signal according to a current feedback signal that represents a load current flowing through the non-linear load. The pulse width control unit generates a control signal according to the feedback signal to control a power output of the conversion circuit. The overshoot reduction unit generates an overshoot reduction signal when the load current changes from being smaller than to being greater than a predetermined value according to the current feedback signal. The pulse width control unit receives the overshoot reduction signal and reduces the duty cycle of the control signal accordingly. Thereby, stability of feedback control is improved and damage to circuit is prevented. | 05-03-2012 |
20120068731 | CIRCUIT FOR RESTRAINING SHOOT THROUGH CURRENT - A circuit for restraining a shoot through current comprises a master selecting unit and a logic unit. The master selecting unit receives an input signal, and outputs first and second master selecting signals. The logic unit comprises first and second logic elements which generate first and second control signals for controlling two transistor switches connected in series. The first and second logic elements change the logic states of the first and second control signals according to the first and second master selecting signals. When the input signal is at a first logic level, the first logic element acquires a control privilege to change the logic state of the first control signal and trigger the second logic element to change the logic state of the second control signal. When the input signal is at a second logic, the second logic element acquires the control privilege. | 03-22-2012 |
20120068674 | MULTIPHASE CONTROL SYSTEM AND CONTROL UNIT - A multiphase control system is provided, which is adapted to convert power of an input power source into an output voltage for outputting through an output terminal. The multiphase control system comprises a plurality of control units connected in series to form a loop. Each of the control units receives a sequential input signal from an adjacent control unit connected there before through a multiphase input terminal, and generates a control signal to control power transmission from the input power source to the output terminal when determining that the output voltage is lower than a predetermined voltage value, and generates a sequential output signal at a multiphase output terminal for outputting to an adjacent control unit connected there after. | 03-22-2012 |
20120062196 | CONVERTING CONTROLLER - The present invention employs a pin of a controller to set an over current protection value and a time period respectively by means of time-division and/or voltage and current. Therefore, the cost of the controller is reduced due to reducing the amount of pins thereof. Furthermore, the time period is not only used to setting a constant on time, but also used to setting a constant off time and an operating frequency for different controlling mode. | 03-15-2012 |
20120061771 | MOSFET LAYOUT AND STRUCTURE - A MOSFET layout is disclosed. The MOSFET comprises a drain region, a gate region, a source region and a body region. The gate region is disposed outside the drain region and adjacent to the drain region. The source region has a plurality of source sections, which are disposed outside of the gate region and adjacent to the gate region. Each of two adjacent source sections has a source blank zone there between. The body region has at least two body portions, which are disposed at the source blank zones and adjacent to the gate region. | 03-15-2012 |
20120057259 | CONTROLLER WITH BATTERY RECHARGE PROTECTIVE FUNCTION - A controller with battery recharge protective function is disclosed in this invention. The controller is used for protecting a battery module. When the battery module is in a protective state, a recharge protection circuit of the controller is activated. A charging current from a positive recharge terminal flows into one pin of the controller. Afterward, the charging current passes the recharge protection circuit, flows out through another pin of the controller, and then returns to a negative recharge terminal. Accordingly, the recharge protection circuit makes the charging current bypass the battery module, so as to prevent the battery module from being damaged. | 03-08-2012 |
20120038391 | TRANSISTOR MODULE AND TRANSISTOR DRIVING MODULE - The present invention discloses a transistor driving module, coupling to a converting controller, to driving a high side transistor and a low side transistor connected in series, wherein one end of the high side transistor is coupled to an input voltage and one end of the low side transistor is grounded. The transistor driving module comprises a high side driving unit, a low side driving unit, a current limiting unit and an anti-short through unit. The high side driving unit generates a high side driving signal to turn the high side transistor on according to a duty cycle signal, and the low side driving unit generates a low side driving signal turn the low side transistor on according to the high side driving signal. The current limiting unit is coupled to the high side transistor and the high side driving unit, and generates a current limiting signal when a current flowing through the high side transistor higher than a current limiting value. The high side driving unit is stopped to generate the high side driving signal when receiving the current limiting value. The anti-short through unit is coupled to the high side driving unit and the low side driving unit to control the generations of the high side driving signal and the low side driving signal to have the timings of the high side driving signal and the low side driving signal non-overlapped. | 02-16-2012 |
20120007751 | DE-BOUNCE CIRCUIT - A de-bounce circuit is disclosed. The de-bounce circuit comprises a wave-shaping circuit, a filtering circuit and a trigger circuit. The wave-shaping circuit is adapted to shape a control signal and output a wave-shaping signal. The control signal may be generated from a mechanical switch. The filtering circuit charges/discharges a capacitor according to the wave-shaping signal, and determines whether to generate a judgment signal according to a voltage of the capacitor. The trigger circuit determines whether to generate an enable signal according to the number of times of the judgment signal. | 01-12-2012 |
20110291591 | DRIVING CIRCUIT AND CONTROL CIRCUIT - A driving circuit, comprising a power supply, a transistor unit and a feedback control circuit, is disclosed. The power supply is adaptor to provide an electric power to drive a load. The transistor unit comprises at least one load coupling end to couple to the load for adjusting an amount of current flowing through the load. The feedback control circuit controls an amount of the electric power provided by the power supply according to a voltage level of the least one load coupling end. Wherein, the feedback control circuit comprises an error amplifying circuit and a feedback control switch. The error amplifying circuit generates an error amplified signal according to the voltage level of the least one load coupling end, and the feedback control switch is coupled to an output of the error amplifying circuit and is switched between a turn-on state and a turn-off state based on a dimming signal. | 12-01-2011 |
20110291575 | LED DRIVING CIRCUIT AND CONTROL CIRCUIT - A control circuit adapted to control a power converting circuit for stabilizing an output of the power converting circuit is provided. The control circuit includes a capacitor, a charging unit, a discharging unit, a feedback control unit, and a duty-cycle adjusting unit. The charging unit has a first current source coupled to the capacitor for charging the capacitor. The discharging unit is coupled to the capacitor for discharging the capacitor. The feedback control unit controls the charging unit to charge the capacitor according to a feedback signal which represents the output of the power converting circuit. The duty-cycle adjusting unit generates a control signal and adjusts a duty cycle of the control signal according to a voltage of the capacitor. | 12-01-2011 |
20110279103 | POWER CONVERTER AND PULSE WIDTH MODULATION SIGNAL CONTROLLING APPARATUS THEREOF - A pulse width modulation signal controlling apparatus including a signal pin, a core circuit, a setting judging circuit, a signal adjusting and selecting circuit, and a timer circuit is disclosed. The signal pin is connected to a setting device for receiving an external input signal. The setting judging circuit receives and compares a setting signal with a reference value to generate a setting judgment result. The signal adjusting and selecting circuit couples the signal pin to the setting judging circuit and adjusts the external input signal into the setting signal according to the setting device in a first state, and couples the signal pin to the core circuit in a second state. The timer circuit controls the state of the signal adjusting and selecting circuit, wherein the timer circuit sets the signal adjusting and selecting circuit in the first state during a predetermined time period. | 11-17-2011 |
20110279061 | FEEDBACK CONTROL CIRCUIT AND POWER CONVERTING CIRCUIT - An exemplary embodiment of the invention provides a set of an initial value of an error amplifying signal in the feedback control circuit for feedback control, so as to reduce the time and the amplitude of oscillation of the error amplifying signal. Accordingly, a feedback control circuit and a power converting circuit provided in an exemplary embodiment of the invention not only reduce the degree and the time of overshoot but also provide accurate and stable feedback control. | 11-17-2011 |
20110266975 | ILLUMINATION CONTROLLER AND ILLUMINATION DRIVING SYSTEM - An illumination controller adapted to control a converting circuit to convert an electric power of a DC input power source to drive a light source is provided. The illumination controller includes a dimming unit and a control unit. The dimming unit receives a dimming signal and correspondingly generates a dimming control signal according to the number of the dimming signal. The control unit controls the electric power provided to the light source by the converting circuit according to the dimming control signal, so as to adjust a brightness of the light source. Furthermore, an illumination driving system is also provided. | 11-03-2011 |
20110248675 | BATTERY VOLTAGE BALANCE APPARATUS AND BATTERY CHARGE APPARATUS - In the related art, the measurement error due to the internal resistance of the battery is not considered in the battery balance method, such that the battery balance is not accurate, or the battery balance process is frequently started and stopped. In exemplary embodiments of the invention, detecting battery voltage and balancing battery voltage are performed in different time, such that the difference of charge current/discharge current among the batteries due to the battery voltage balance process do not affect the battery voltage detecting. | 10-13-2011 |
20110215780 | DE-GLITCH SWITCHING CONVERTING CIRCUIT AND CONTROLLER THEREOF - A de-glitch switching converting circuit and a controller thereof are provided. In the embodiment of the invention, the circuit can filter noises with high frequency by way of time judgment, so as to avoid the erroneous operation of the controller affecting the stability of the output voltage or the output current. Compared with the method of using low-pass filters with large capacitors to filter noises, highly increasing the cost of the circuit is unnecessary in the embodiment of the invention. The circuit in the embodiment of the invention also has the capability for filtering noises with high amplitudes. In addition, by setting suitable parameters, the circuit in the embodiment of the invention can also avoid affecting the transient response of the circuit while filtering noises. | 09-08-2011 |
20110210682 | LED DRIVING CIRCUIT AND POWER CONVERTING CIRCUIT - A power converting circuit having the function of circuit detecting is provided. The power converting circuit has a transistor, a controller and a detecting circuit. The transistor receives an input voltage. The controller is coupled to a control end of the transistor to control the conducting state of the transistor so as to stabilize the output of the power converting circuit. The detecting circuit detects at least one of the control end and the low voltage end of the transistor, and generates a state signal when the detected voltage of any one of the control end and the low voltage end does not fall within a corresponding predetermined voltage range. The state signal is utilized for stopping a power circuit which provides the input voltage providing the input voltage. In addition, a light emitting diode driving circuit having the function of circuit detecting is also provided. | 09-01-2011 |
20110175538 | LAMP DRIVING APPARATUS AND LEVEL SHIFT DRIVING CIRCUIT - A lamp driving apparatus includes a switch module, a controller, a resonant module, and a level shift circuit. The switch module includes a high side transistor switch and a low side transistor switch connected in series between an input power source and a common level. The controller controls the high side and the low side transistor switches to control the power from the input power source transmitted through the switch module. The resonant module coupled to the switch module converts the power into an AC output signal to drive a lamp. The level shift circuit generates a high side control signal based on an voltage level of a connecting node of the high side and the low side transistor switches, the level shift voltage, and a control signal generated by the controller so as to control the high transistor switch. | 07-21-2011 |
20110113397 | LAYOUT STRUCTURE OF MOSFET AND LAYOUT METHOD THEREOF - A layout structure of a MOSFET is provided. The layout structure of the MOSFET includes a plurality of MOSFET cells, a first source/drain metal bus structure and a second source/drain metal bus structure. The first source/drain metal bus structure is electrically connected to first sources/drains of the MOSFET cells, and a width thereof is gradually decreased in a predetermined direction. The second source/drain metal bus structure is electrically connected to second sources/drains of the MOSFET cells, and a width thereof is gradually increased in the predetermined direction. | 05-12-2011 |
20110109373 | TEMPERATURE COEFFICIENT MODULATING CIRCUIT AND TEMPERATURE COMPENSATION CIRCUIT - In the conventional temperature compensation circuit, the thermal resistor is used to perform the temperature compensation, but the provided compensation range is limited due to the temperature coefficient of the thermal resistor. The embodiment of the invention provides a temperature coefficient modulating circuit capable of amplifying the temperature coefficient of the thermal resistor, so as to provide a wider compensation range in different applications. | 05-12-2011 |
20110109288 | POWER CONVERTING CIRCUIT - A power converting circuit including a converting circuit and a controller is provided. In an embodiemnt of the invention, the inductance of the converting circuit and the operation frequency of the controller can be adjusted according to the power required by the load and/or the size of the inductor current to effectively reduce the switching times and the switching loss of the switch in the converting circuit when the load is light. Accordingly, no matter the load is light or heavy, the efficiency of the power converting circuit can be maintained at a higher standard. | 05-12-2011 |
20110109268 | BATTERY VOLTAGE BALANCE APPARATUS AND BATTERY CHARGE APPARATUS - A battery voltage balance apparatus including a balance determining unit and a converting unit is provided. The balance determining unit is coupled to a plurality of battery units and determines whether to perform a battery voltage balance process according to battery voltages of each battery units. The converting unit has an energy storage circuit and is coupled to the battery units. In the battery voltage balance process, the converting unit stores energy in the energy storage circuit and selectively charging at least one of the battery units by the energy storage circuit, so that the voltage differences between any two of the battery units are reduced to be lower than a predetermined value or a predetermined percentage. | 05-12-2011 |
20110109231 | LED CURRENT CONTROL CIRCUIT, CURRENT BALANCER AND DRIVING APPARATUS - An LED current control circuit including a current adjusting unit, a detecting unit, and a current control unit is provided. The current adjusting unit has a current control end coupled to an LED string for determining an amount of current flowing through the LED string according to a current control signal. The detecting unit detects the current control end and determines whether to generate a protecting signal according to a protecting voltage value. The current control unit generates the current control signal to control the amount of current flowing through the LED string of and determines whether to stop the current flowing through the LED string according to the protecting signal. | 05-12-2011 |
20110089865 | LOAD DRIVING CIRCUIT AND MULTI-LOAD FEEDBACK CIRCUIT - A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof. | 04-21-2011 |
20110089858 | LOAD DRIVING CIRCUIT AND MULTI-LOAD FEEDBACK CIRCUIT - A load driving circuit and a multi-load feedback circuit are disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive an LED module comprising a current balancing circuit for balancing the current flowing through LEDs. The load driving circuit and the multi-load feedback circuit modulate the electric power transmitted by the LED driving apparatus to an LED module according to voltage level(s) of one or more current balancing terminals having insufficient voltage in the current balancing circuit, so the voltage levels of the current balancing terminals are higher than or equal to a predetermined voltage level, further increasing the efficiency thereof. | 04-21-2011 |
20110062917 | BATTERY VOLTAGE EQUALIZER CIRCUIT AND METHOD FOR USING THE SAME - A battery voltage equalizer circuit for equalizing battery voltages among a plurality of battery cells in a serial connection is disclosed. The battery voltage equalizer circuit includes a battery voltage equalizer unit having a plurality of equalizer parts, wherein each equalizer part, coupled to a positive terminal and a negative terminal of a corresponding battery cell, is conducted with an equalization current upon a receipt of an equalization signal, and a battery voltage detector unit, coupled to the positive and negative terminals of the plurality of battery cells, generates the equalization signal so as to conduct the battery voltage equalizer unit as long as a voltage of any one of the battery cells reaches an equalization voltage. | 03-17-2011 |
20110043139 | LED DRIVING CIRCUIT AND DRIVING CONTROLLER FOR CONTROLLING THE SAME - A driving controller for driving a load is disclosed. The driving circuit includes a driving power supply and the driving controller. The driving power supply provides a first power source to the load. The controller is coupled to a second power source to receive an electric power for operating. The controller controls the amount of the electric power to the load when operating in a first mode and stops the driving power supply from providing the electric power to the load when operating in a second mode. The controller operates exclusively in the first mode before the driving power supply provides the first power source to the load. | 02-24-2011 |
20110037401 | POWER CONVERSION DRIVING CIRCUIT AND FLUORESCENT LAMP DRIVING CIRCUIT - A power conversion driving circuit is provided. The power conversion drive circuit includes a converting circuit, a control circuit and a load circuit. The converting circuit is coupled to an input voltage. The control circuit is coupled to the converting circuit for controlling the converting circuit to convert the input voltage to an output voltage. The load circuit includes a load detecting unit and a load. The load is coupled to the output voltage, and the load detecting unit is coupled to a detecting voltage source. The load detecting unit generates a load detecting signal to re-start the control circuit when the load circuit is inserted into the power conversion driving circuit. | 02-17-2011 |
20110018618 | CHARGE PUMP CIRCUIT - A rectifying device is used to prevent any reverse current in a charge pump circuit. Accordingly, energy stored in the charge pump circuit is prevented from being transmitted back to an input voltage source, or energy stored in a capacitor coupled to an output end is prevented from being transmitted back to the charge pump circuit and the input voltage source. Besides, a current limiting unit coupled to the input voltage source or/and the output end is used to protect devices of the charge pump circuit from being burned out due to an overly large current provided by the input voltage source to the charge pump circuit or/and an overly large current provided by the charge pump circuit to the output end when a short circuit occurs. | 01-27-2011 |
20100327828 | MOSFET CURRENT LIMITING CIRCUIT, LINEAR VOLTAGE REGULATOR AND VOLTAGE CONVERTING CIRCUIT - A MOSFET current limiting circuit, a linear voltage regulator, and a voltage converting circuit are provided. A current limiting value of the MOSFET is adjusted with the temperature or the voltage drop across the drain and the source of the MOSFET. Accordingly, it is ensured that the MOSFET operates in the safe operating area in any situation. Therefore, the MOSFET is prevented from being burnt out, and the reliability thereof is also increased. | 12-30-2010 |
20100301762 | LED DRIVING CIRCUIT AND BACKLIGHT MODULE - A LED driving circuit and a backlight module using the same are disclosed. The LED driving circuit comprises a LED module and a current controlling unit. The LED module has a plurality of the LED strings, each having a driving terminal. The current controlling unit has a plurality of current balancing terminal coupled to the driving terminal, for balancing the currents flowing through the LED strings. The current controlling unit receives a mode switch signal, controls the amount of the currents of the LED strings about a first current value when the mode switch signal represent a first mode, and controls the amount of the currents of the LED strings about a second current value when the mode switch signal represent a second mode. | 12-02-2010 |
20100244912 | CONTROLLER AND VOLTAGE DETECTION ENABLING CIRCUIT THEREOF - A voltage detection enabling circuit is disclosed. The voltage detection enabling circuit includes a reference voltage generating unit, an enabling protection unit, and an enabling judgment unit. The reference voltage generating unit is coupled to a driving voltage, and generates a reference voltage signal. The enabling protection unit receives the reference voltage signal and outputs an enabling judgment signal when the reference voltage signal is higher than a voltage parameter. Particularly, the voltage parameter is a component parameter of an electronic component. Then the enabling judgment unit determines whether an enabling signal is generated or not according to the enabling judgment signal and the driving voltage. | 09-30-2010 |
20100244796 | CURRENT TRIGGER CIRCUIT AND SWITCHING POWER CONVERTER USING THE SAME - A bias voltage is compared with a voltage difference in a detecting element according to the present invention. A bias voltage unit is coupled to the detecting element, so that they have a common voltage level to avoid noises when the circuit is operating. Accordingly, the erroneous detection caused by the noise interference can be avoided. Hence, a detecting element with a low resistance, such as an MOEFET, can be used in the present invention to decrease power consumption arisen from current detection and to further increase conversion efficiency. | 09-30-2010 |
20100148741 | CONVERTING CIRCUIT AND CONTROLLER FOR CONTROLLING THE SAME - The present invention uses a discharge path to release the power stored in an output capacitor of a converting circuit when the time interval between two adjacent switching thereof is too long and may generate noises whose frequencies can be sensed by human ears. Hence, the present invention can keep the operating frequency of the converting circuit higher than a predetermined frequency and reduce the audio noise of the converting circuit. | 06-17-2010 |