Patent application number | Description | Published |
20090296805 | Pulse width modulation controller and pulse waveform control method - A pulse width modulation (PWM) controller includes: a first counter for counting a reference clock signal, and thus outputting a first count value, a leading edge control signal generator for outputting a leading edge control signal on a basis of the first count value, an adjustment clock generator for generating an adjustment clock signal, a second counter controller for instructing the adjustment clock generator to start to output the adjustment clock signal, a second counter for outputting a second count value, a trailing edge control signal generator for outputting a trailing edge control signal on a basis of the second count value, and a PWM pulse generator for synthesizing the leading edge control signal and the trailing edge control signal, and thus generating a pulse width modulation signal. | 12-03-2009 |
20100001705 | Power controller for supplying power voltage to functional block - A power controller includes a digital control circuit which performs a digital control on a basis of a difference between an output voltage supplied to a power control target device and a voltage reference, so that the output voltage is equal to the voltage reference, and a processor control circuit which conducts an operation of a processor in the digital control circuit, in response to a change of a control signal supplied by the power control target device and indicating a state of a load in the power control target device, which monitors an output from the digital control circuit, and which stops the operation of the processor when the load is judged to have no change. | 01-07-2010 |
20100052639 | Power supply controller having analog to digital converter - A power supply controller includes an analog to digital (A/D) converter that performs analog-digital conversion of an output voltage and outputs a digital signal, a deviation signal generator unit that generates a deviation signal from the digital signal and a standard voltage value serving as an output voltage target value, and a power controller unit that controls the output voltage based on the deviation signal. The power supply controller includes a conversion range setting unit that sets a range of the reference voltage into the A/D converter based on a first signal as the digital signal in a power supply startup period, and sets the reference voltage range into the A/D converter based on a second signal as the deviation signal or as a signal corresponding to the deviation signal in a steady state period. | 03-04-2010 |
20120159214 | POWER CONTROLLER FOR SUPPLYING POWER VOLTAGE TO FUNCTIONAL BLOCK - A power controller, includes a digital control circuit that outputs a result of comparing a first voltage being input and a voltage reference, and a processor control circuit that stops an operation of the processor based on the result of comparing. | 06-21-2012 |
20120182002 | POWER SUPPLY CONTROLLER HAVING ANALOG TO DIGITAL CONVERTER - A power supply controller includes a switching circuit which, in response to a control signal, transfers an analog signal to an output node as an outputted analog signal, the output node being coupled to an inductor and a capacitor, an analog to digital (A/D) converter which converts an outputted analog signal to a digital signal, a pulse width modulation (PWM) generator circuit which produces a PWM signal based on the digital signal, a driver which produces the control signal in response to the PWM signal, and a conversion range setting unit which sets a range data for the A/D converter based on the digital signal during a first period, and which sets the range data based on the PWM signal during a second period. | 07-19-2012 |
20120326685 | POWER SUPPLY CONTROL DEVICE AND POWER SUPPLY CONTROL METHOD - A control device includes a first terminal receiving a monitored output voltage and a second terminal transmitting a pulse width modulation (PWM) signal. A converting unit generates an A/D conversion synchronous signal, and an A/D converter samples the monitored output voltage in accordance with the A/D conversion synchronous signal. A pulse oscillator controls a position of a first edge on the PWM signal in accordance with the A/D conversion synchronous signal, and controls a position of a second edge based on the monitored voltage. | 12-27-2012 |
20130002222 | POWER SUPPLY CONTROLLER HAVING ANALOG TO DIGITAL CONVERTER - A power supply control method of performing a feedback control of an output voltage based on a deviation signal for a standard voltage value serving as a target value for the output voltage and a digital signal generated by analog/digital (A/D) conversion of the output voltage, the method includes selecting a range of the reference voltage for the A/D conversion based on the digital signal in a power supply startup period, and selecting a range of the reference voltage for the A/D conversion based on the deviation signal or a signal corresponding to the deviation signal in a steady state period. | 01-03-2013 |
20130009719 | PULSE WIDTH MODULATION CONTROLLER AND PULSE WAVEFORM CONTROL METHOD - A pulse width modulation (PWM) controller includes a first counter for counting a reference clock signal, and thus outputting a first count value, a leading edge control signal generator for outputting a leading edge control signal on a basis of the first count value, an adjustment clock generator for generating an adjustment clock signal, a second counter controller for instructing the adjustment clock generator to start to output the adjustment clock signal, a second counter for outputting a second count value, a trailing edge control signal generator for outputting a trailing edge control signal on a basis of the second count value, and a PWM pulse generator for synthesizing the leading edge control signal and the trailing edge control signal, and thus generating a pulse width modulation signal. | 01-10-2013 |