发明名称 |
Offline synchronous rectifier circuit with turned-on arbiter and phase-lock for switching power converters |
摘要 |
A synchronous rectifier circuit of a switching power converter is provided and includes first and second power transistors and first and second diodes connected to a transformer and an output of the power converter for rectifying. An arbiter circuit generates a lock signal to prevent the second power transistor from being turned on when the first power transistor is turned on. A controller generates a drive signal to control the first power transistor according to an on signal and an off signal. A phase-lock circuit generates the off signal according to the on signal. The on signal is enabled once the first diode is forward biased. The one signal enables the drive signal for turning on the first power transistor. The off signal disables the drive signal for turning off the first power transistor. The off signal is enabled before the disabling of the on signal. |
申请公布号 |
US8154888(B2) |
申请公布日期 |
2012.04.10 |
申请号 |
US20090348335 |
申请日期 |
2009.01.05 |
申请人 |
YANG TA-YUNG;WANG CHOU-SHENG;TSU PEI-SHENG;SYSTEM GENERAL CORPORATION |
发明人 |
YANG TA-YUNG;WANG CHOU-SHENG;TSU PEI-SHENG |
分类号 |
H02M3/335;H02H7/122 |
主分类号 |
H02M3/335 |
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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