公开(公告)号：US09859783B1

公开(公告)日：2018-01-02

申请号：US14075432

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Yu-Lun Chang ,  Yuan-Wen Hsiao ,  Jian-Rong Huang

IPC: G05F1/569 ,  H02M1/088 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M1/088 ,  H02M1/38 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0048

Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.

公开(公告)号：US20170366080A1

公开(公告)日：2017-12-21

申请号：US14075432

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Yu-Lun Chang ,  Yuan-Wen Hsiao ,  Jian-Rong Huang

IPC: H02M1/088 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M1/088 ,  H02M1/38 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0048

Abstract: A voltage converter controller, adapted to a voltage converter circuit, includes a power switch controller and a dead-time determining circuit. The power switch controller receives a PWM signal and outputs a high-side control signal and a low-side control signal accordingly to control the conduction and cut-off of a high-side power switch and a low-side power switch respectively. When the power switch controller starts to control the low-side power switch cut-off, after a first dead-time, the power switch controller starts to control the high-side power switch conducting. The dead-time determining circuit detects a current of the low-side power switch to be larger or smaller than a threshold current when the low-side power switch is conducted, and determines the first dead-time to be a first value or a second value accordingly.