Title:
OVERVOLTAGE OUTPUT PROTECTION METHOD FOR CRITICAL MODE POWER FACTOR CORRECTION (PFC) CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2024/093626
Kind Code:
A1
Abstract:
Disclosed in the present invention is an overvoltage output protection method for a critical mode power factor correction (PFC) circuit, comprising: acquiring an input voltage Vin of a power factor correction (PFC) circuit; acquiring a discharge duration Tr of an inductor in the power factor correction (PFC) circuit; acquiring a discharge duration Ton of the inductor in the power factor correction (PFC) circuit; adding an overvoltage protection floating value to an estimated value of an output voltage Vbus, so as to generate an overvoltage output protection voltage threshold; and, according to the overvoltage output protection voltage threshold, determining an actual output voltage Vbus, so as to determine whether an overvoltage output protection needs to be started.
Inventors:
HU CHENGYU (CN)
WANG NAILONG (CN)
WANG NAILONG (CN)
Application Number:
PCT/CN2023/123845
Publication Date:
May 10, 2024
Filing Date:
October 10, 2023
Export Citation:
Assignee:
X SIGNAL INTEGRATED CO LTD (CN)
International Classes:
H02H3/20; H02H1/00; H02M1/08; H02M1/42
Foreign References:
| CN115566636A | 2023-01-03 | |||
| CN111082676A | 2020-04-28 | |||
| CN105514934A | 2016-04-20 | |||
| CN103454481A | 2013-12-18 | |||
| CN109713889A | 2019-05-03 | |||
| KR20170000634A | 2017-01-03 |
Attorney, Agent or Firm:
BEIJING ZHIYU ZHENGXIN INTELLECTUAL PROPERTY AGENCY (CN)
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