公开(公告)号：US20210399625A1

公开(公告)日：2021-12-23

申请号：US17018172

申请日：2020-09-11

Applicant: ACBEL POLYTECH INC.

Inventor： CHIA-CHIH HSIANG

IPC: H02M1/32 ,  H02J1/10 ,  H02M3/158

Abstract: A power supply device with improved current balancing mechanism includes a power supply module, and a current detecting module detecting the output current to generate a sample voltage. A compensation voltage is provided that is in superposition with the sample voltage to synthesizes a corrected sample voltage, and a current mirror unit receives the corrected sample voltage at a first end. A positive input end of a comparator unit is connected to a second end of the current mirror unit, and is connected to the first end through a voltage divider, while the comparator unit outputs the current share voltage under negative feedback control. The current share output is corrected by compensating the sampling voltage and reflecting it by a current mirror with a certain ratio, the inconvenience of manually adjusting variable resistor, or the problem of temperature influenced BJT and MOSFET, or phase delay of digital sampling is solved.