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Title:
OUTPUT SOFT-START CIRCUIT FOR SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2019/085544
Kind Code:
A1
Abstract:
An output soft-start circuit for a switching power supply, used for implementing slow establishment of a switching power supply output voltage. After a power supply is started, an output voltage is increased, a capacitor is charged, signals in the charging process are introduced into a voltage feedback loop in real time, and the duty cycle of a PWM control chip is limited, so as to enable the output voltage to be increased to a specified value in a capacitor charging index form. In a case where the feedback loop has a power supply mode such as an auxiliary power supply, the soft-start circuit can still work normally, and the circuit is simple, low in costs, and high in reliability.

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Inventors:
SHEN ZHIPENG (CN)
SONG JIANFENG (CN)
LUO HAO (CN)
Application Number:
PCT/CN2018/095132
Publication Date:
May 09, 2019
Filing Date:
July 10, 2018
Export Citation:
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Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
H02M1/36
Foreign References:
CN107733219A2018-02-23
CN204598412U2015-08-26
CN106604463A2017-04-26
CN201928186U2011-08-10
CN106685204A2017-05-17
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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