Title:
DC-DC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2019/218706
Kind Code:
A1
Abstract:
A DC-DC converter, comprising a first side, a second side, a converter B, power transistors Q1, Q2, Q3 and Q4, and capacitors C1 and C2, wherein the converter B at least comprises a first winding Np and a second winding Ns; the connection relationship at the first side comprises Q1 being in series connection with Np, and Q3 being in series connection with C1 and then being in parallel connection with Np; the second side and the first side are symmetrical; Vgs1, Vgs2, Vgs3 and Vgs4 are drive signals that are sequentially applied between gate electrodes and source electrodes of Q1, Q2, Q3 and Q4; a drive timing sequence used by power transistors Q1 to Q4 overcomes the problem of a high switch-off voltage spike existing due to the resonance of the voltage leakage inductance of Q1 and Q2 with the combined capacitors thereof; and by means of limiting the conduction time of Q3 and Q4, the power loss generated by the resonance of C1 and C2 is reduced when Q1 and Q2 are switched off. The present invention has the advantages of simple circuitry and high conversion power.
Inventors:
LI YONGCHANG (CN)
WU HUI (CN)
LI BINHUA (CN)
WU HUI (CN)
LI BINHUA (CN)
Application Number:
PCT/CN2019/070645
Publication Date:
November 21, 2019
Filing Date:
January 07, 2019
Export Citation:
Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
H02M3/335
Foreign References:
| CN108418438A | 2018-08-17 | |||
| CN208424210U | 2019-01-22 | |||
| CN1352488A | 2002-06-05 | |||
| CN104300795A | 2015-01-21 | |||
| US9614447B2 | 2017-04-04 | |||
| CN107482921A | 2017-12-15 |
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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