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1.发明授权公开(公告)号：US11381165B2
公开(公告)日：2022-07-05
申请号：US17145464
申请日：2021-01-11
Applicant: Richtek Technology Corporation
Inventor： Chia-Chi Liu , Yu-Chieh Lin , Yen-Hsun Wang , Ruei-Pei Jiang
Abstract: The power supply controller is for use in a power supply circuit, for reducing acoustic noise. The power supply control circuit generates a control signal according to a voltage identification (VID) signal and a voltage sense signal, to operate a power switch in a power stage circuit, thus converting an input voltage to an output voltage. The power supply control circuit includes a conversion circuit and a PWM control circuit. The conversion circuit includes a DAC and a slope control circuit. When the power supply controller operates in an acoustic noise reduction mode and when a present level is higher than a requested level, the slope control circuit adjusts a descending slope of an analog voltage identification signal which is generated according to the VID signal, so as to restrain a decrease velocity of the output voltage to be higher than zero but not higher than a predetermined velocity.
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公开(公告)号：US11381173B2
公开(公告)日：2022-07-05
申请号：US17145402
申请日：2021-01-11
Applicant: Richtek Technology Corporation
Inventor： Yung-Jen Chen , Yu-Chieh Lin , Chia-Chi Liu , Fu-To Lin
Abstract: A switching regulator which has load transient quick response ability includes at least one power stage circuit and a control circuit. The control circuit includes a pulse width modulation (PWM) signal generation circuit and a quick response (QR) signal generation circuit. The PWM signal generation circuit generates a PWM signal according to an output voltage and a QR signal, to control a power switch of the corresponding power stage circuit, thus converting an input voltage to the output voltage. The QR signal generation circuit includes a differentiator circuit and a comparison circuit. The differentiator circuit performs a differential operation on a voltage sensing signal related to the output voltage, to generate a differential signal. The comparison circuit compares the differential signal with a QR threshold signal, such that when the differential signal exceeds the QR signal, the PWM signal generation circuit performs a QR procedure.
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3.发明申请公开(公告)号：US20210296985A1
公开(公告)日：2021-09-23
申请号：US17145464
申请日：2021-01-11
Applicant: Richtek Technology Corporation
Inventor： Chia-Chi Liu , Yu-Chieh Lin , Yen-Hsun Wang , Ruei-Pei Jiang
Abstract: The power supply controller is for use in a power supply circuit, for reducing acoustic noise. The power supply control circuit generates a control signal according to a voltage identification (VID) signal and a voltage sense signal, to operate a power switch in a power stage circuit, thus converting an input voltage to an output voltage. The power supply control circuit includes a conversion circuit and a PWM control circuit. The conversion circuit includes a DAC and a slope control circuit. When the power supply controller operates in an acoustic noise reduction mode and when a present level is higher than a requested level, the slope control circuit adjusts a descending slope of an analog voltage identification signal which is generated according to the VID signal, so as to restrain a decrease velocity of the output voltage to be higher than zero but not higher than a predetermined velocity.
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公开(公告)号：US20210296989A1
公开(公告)日：2021-09-23
申请号：US17145402
申请日：2021-01-11
Applicant: Richtek Technology Corporation
Inventor： Yung-Jen Chen , Yu-Chieh Lin , Chia-Chi Liu , Fu-To Lin
Abstract: A switching regulator which has load transient quick response ability includes at least one power stage circuit and a control circuit. The control circuit includes a pulse width modulation (PWM) signal generation circuit and a quick response (QR) signal generation circuit. The PWM signal generation circuit generates a PWM signal according to an output voltage and a QR signal, to control a power switch of the corresponding power stage circuit, thus converting an input voltage to the output voltage. The QR signal generation circuit includes a differentiator circuit and a comparison circuit. The differentiator circuit performs a differential operation on a voltage sensing signal related to the output voltage, to generate a differential signal. The comparison circuit compares the differential signal with a QR threshold signal, such that when the differential signal exceeds the QR signal, the PWM signal generation circuit performs a QR procedure.
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