CONTROL DEVICE AND METHOD FOR FLYBACK SWITCH-MODE POWER SUPPLY, AND CHARGER

WIPO Patent Application WO/2024/036790

A1

The present application provides a control device and method for a flyback switch-mode power supply, and a charger. The control device comprises a PWM logic module, and a valley detection module, a valley quantity determining module, and a peak current control module which are connected to the PWM logic module; the valley detection module detects valleys during operation of a flyback converter; the valley quantity determining module determines, by means of a feedback voltage, the quantity of valleys when a main power switch tube is switched on; the peak current control module obtains, according to the feedback voltage, a peak current signal when the main power switch tube is switched off, specifically: the peak current control module reduces the peak current signal by an offset when the quantity of valleys decreases, or increases the peak current signal by an offset when the quantity of valleys increases, so that transmission powers at adjacent valleys of the flyback converter overlap; the PWM logic module generates a PWM pulse for driving the main power switch tube. Embodiments of the present application can implement a valley locking function of flyback converters.

JP3806279	LIGHTING CIRCUIT OF DISCHARGE LAMP
JPH0710170	[Title of Invention] Series Resonant Converter
JP2012120330	DC/DC CONVERTER DEVICE

ZHU KUANG (CN)
CHEN WEI (CN)

PCT/CN2022/132295

February 22, 2024

November 16, 2022

Click for automatic bibliography generation  

SHENZHEN INJOINIC TECH CO LTD (CN)

H02M3/335; H02M1/08; H02M1/44

CN115065254A	2022-09-16
CN111490681A	2020-08-04
CN112217379A	2021-01-12
CN103701316A	2014-04-02
US9621053B1	2017-04-11

SCIHEAD IP LAW FIRM (CN)

View/Download PDF      PDF Help

Previous Patent: VALLEY LOCKOUT CONTROL METHOD FOR FLYBACK SWITCH POWER SUPPLY, AND RELATED APPARATUS

Next Patent: IN-VITRO TUMOR LOCALIZATION APPARATUS BASED ON PHOTOACOUSTIC EFFECT