Title:
PFWM CONTROL SYSTEM FOR SWITCHED-MODE POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/206068
Kind Code:
A1
Abstract:
The present invention provides a PFWM control system for a switched-mode power supply circuit, for controlling an output voltage, an output current, or an output power of the switched-mode power supply. The PFWM control system for the switched-mode power supply circuit comprises a duty cycle control unit, a frequency control unit, and a PFWM signal generation module. The switched-mode power supply circuit comprises a boost conversion circuit and a DC-DC converter. The duty cycle control unit samples an output voltage, an output current, or an output power of the DC-DC converter, and calculates a duty cycle of a switch device of the switched-mode power supply according to the sampling result. The frequency control unit samples an input voltage or an output voltage of the boost conversion circuit, and calculates an operation frequency of the switch device of the switched-mode power supply circuit according to the sampling result. The PFWM signal generation module synthesizes a PFWM drive signal according to the duty cycle and the operation frequency. The PFWM drive signal drives a switch device of the boost conversion circuit and the DC-DC converter, so as to control an output voltage, an output current, or an output power provided to a load by the DC-DC converter.
Inventors:
LI RENHONG (CN)
SHEN ZHUO (CN)
SHEN ZHUO (CN)
Application Number:
PCT/CN2019/083638
Publication Date:
October 31, 2019
Filing Date:
April 22, 2019
Export Citation:
Assignee:
SHANGHAI TUITUO TECH CO LTD (CN)
International Classes:
H02M3/335; H02M1/42
Foreign References:
| CN108539984A | 2018-09-14 | |||
| CN108512421A | 2018-09-07 | |||
| CN103856079A | 2014-06-11 | |||
| CN205509881U | 2016-08-24 | |||
| US9601990B2 | 2017-03-21 | |||
| TW201739155A | 2017-11-01 |
Attorney, Agent or Firm:
SHANGHAI SAVVY IP AGENCY CO., LTD. (CN)
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