Title:
PULSE MIXING MODULATED - TYPE SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2002/025799
Kind Code:
A1
Abstract:
The present invention discloses a pulse mixing modulated - type switching power supply. It comprises: a direct current voltage input terminal, a transformer, a main switch tube, a resonant capacitor and a controlling circuit. The resonant capacitor is connected parallel with the primary side of the transformer. One terminal of the main switch tube is connected with one terminal of the primary side of the transformer, another terminal is connected with earth, its control terminal is connected with output signal of the controlling circuit. It characterized in that further comprises feedforward sampling resistor, one terminal of the resistor being connected with positive terminal of direct current voltage input terminal, another terminal being connected with triangular wave oscillator of pulse width modulator, as a part of clock oscillation charging signal. The present invention can ensure high reliability of the main switch tube.
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Inventors:
YANG GUANGCHENG (CN)
LIU FEI (CN)
LIU FEI (CN)
Application Number:
PCT/CN2001/001212
Publication Date:
March 28, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
AVANSYS POWER CO LTD (CN)
YANG GUANGCHENG (CN)
LIU FEI (CN)
YANG GUANGCHENG (CN)
LIU FEI (CN)
International Classes:
H02M3/335; (IPC1-7): H02M3/335
Foreign References:
| US5675485A | 1997-10-07 | |||
| CN1168200A | 1997-12-17 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD (Zhongke Building No. 80, Haidian Roa, Haidian District Beijing 0, CN)
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