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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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2.发明申请公开(公告)号：US20240388193A1
公开(公告)日：2024-11-21
申请号：US18494888
申请日：2023-10-26
Applicant: Richtek Technology Corporation
Inventor： Chun-Lien Chen , Yung-Jen Chen , Chong-Rong Lee
Abstract: A switching converter includes: a power stage circuit configured to switch at least one switch of the power stage circuit according to a control signal, to convert an input voltage to an output voltage; and a control circuit configured to execute modulation on a pulse width according to a feedback voltage related to the output voltage, to generate the control signal in a heavy load status. In a light load status, and when the switching converter operates at a discontinuous conduction mode (DCM), after an inductor current flowing through the power stage circuit has already become a zero current, the control circuit ceases executing modulation on the pulse width according to the feedback voltage and ceases keeping a compensation voltage correlated with the output voltage at a present level.
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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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