公开(公告)号：US11984807B2

公开(公告)日：2024-05-14

申请号：US17734396

申请日：2022-05-02

Applicant: Richtek Technology Corporation

Inventor： Jian-Ming Fu ,  Huan-Chien Yang

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/0009

Abstract: A power converter includes an upper-gate circuit, a lower-gate circuit, an inductor, a first current sensor, a second current sensor, a weight adjustment circuit, and a PWM (Pulse Width Modulation) controller. The upper-gate circuit receives an input voltage. The lower-gate circuit is coupled to a ground node. The upper-gate circuit and the lower-gate circuit are operated according to the PWM voltage. The inductor is coupled to the upper-gate circuit and the lower-gate circuit. The first current sensor monitors the upper-gate circuit, so as to generate a first detection current. The second current sensor monitors the lower-gate circuit, so as to generate a second detection current. The weight adjustment circuit generates a control current according to the first detection current and the second detection current. The PWM controller generates the PWM voltage according to the control current.

公开(公告)号：US11658650B1

公开(公告)日：2023-05-23

申请号：US17722796

申请日：2022-04-18

Applicant: Richtek Technology Corporation

Inventor： Jian-Ming Fu ,  Huan-Chien Yang

IPC: H03K7/08 ,  G01R19/10

CPC classification number: H03K7/08 ,  G01R19/10

Abstract: A PWM (Pulse Width Modulation) controller includes a current detector, a current emulator, a voltage-to-current converter, and a current adder. The current detector detects a first current, and generates a second current according to the first current. The current detector receives an input voltage and outputs an output voltage. The current emulator obtains the relative information of a lower-gate current. The voltage-to-current converter draws a third current from the current emulator according to the input voltage and the output voltage. The current emulator generates a fourth current according to the relative information and the third current. The current adder adds the fourth current to the second current, so as to generate a sum current.