CONVERTER AND POWER ADAPTER

WIPO Patent Application WO/2024/026733

A1

Provided in the present application are a converter and a power adapter. The converter comprises an inverter circuit, a resonant network, a transformer and a drive control module, wherein the inverter circuit comprises at least two switching tubes including a main switching tube and an auxiliary switching tube, which are connected in series; the transformer comprises a primary winding, a secondary winding and a primary auxiliary winding; a first connection end of the main switching tube is an input end of the inverter circuit and is connected to a power supply; a second connection end of the main switching tube is grounded by means of the auxiliary switching tube; the primary winding of the transformer is connected in parallel to two ends of the auxiliary switching tube or two ends of the main switching tube by means of the resonant network; the secondary winding of the transformer is an output end of the converter and is connected to a load; the primary auxiliary winding of the transformer is connected in parallel to two ends of at least two divider resistors connected in series; and the drive control module is configured to control, when the main switching tube is turned on and voltage zero-crossing of the primary auxiliary winding is detected, the main switching tube to be opened. By using the present application, the input voltage range of the converter can be widened.

WANG SHUAIBING (CN)
CHIN KEN (CN)
DAI BAOLEI (CN)

PCT/CN2022/109978

February 08, 2024

August 03, 2022

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HUAWEI DIGITAL POWER TECH CO LTD (CN)

H02M3/335

CN114710012A	2022-07-05
CN113937988A	2022-01-14
CN113659837A	2021-11-16
CN114039486A	2022-02-11

SCIHEAD IP LAW FIRM (CN)

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