发明名称 |
SWITCHING POWER SOURCE CIRCUIT WITH DRIVE FREQUENCY VARIABLY CONTROLLED BY SWITCHING ELEMENT |
摘要 |
A complex resonance type switching converter comprising a self-excited voltage resonance type converter has a conduction control element (Q2) series-connected to a drive transformer (CDT) wherein a detection winding (NA) and a drive winding (NB) and the control winding (Nc) of a self-oscillated drive circuit are wound around the same core. The current conduction quantity of the conduction control element (Q2) is variably controlled to vary the level of a base current flowing through the base of the switching element (Q1) from the self-oscillated drive circuit, so that the switching frequency is variably controlled. Thus, the conduction angle and the switching frequency of a switching element are varied simultaneously, resulting in the constant voltage control of the secondary side DC output of the converter. Use of this drive transformer (CDT) enables the suppression of a variation in a self-oscillated drive circuit and attains miniaturization.
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申请公布号 |
WO02071589(A1) |
申请公布日期 |
2002.09.12 |
申请号 |
WO2002JP02018 |
申请日期 |
2002.03.05 |
申请人 |
SONY CORPORATION;YASUMURA, MASAYUKI |
发明人 |
YASUMURA, MASAYUKI |
分类号 |
H02M3/338;(IPC1-7):H02M3/28 |
主分类号 |
H02M3/338 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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