发明名称 |
Synchronous rectifier having phase lock circuit coupled to feedback loop for resonant power converters |
摘要 |
A synchronous rectifier for a switching power converter is provided and includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for the rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a phase-lock circuit. The phase-lock circuit generates an off signal to switch off the power transistor in response to a pulse width of the drive signal. The pulse width of the drive signal is shorter than a turned-on period of the diode. The phase-lock circuit further reduces the pulse width of the drive signal in response to a feedback signal. The feedback signal is correlated to an output load of the power converter. |
申请公布号 |
US8649191(B2) |
申请公布日期 |
2014.02.11 |
申请号 |
US20090579462 |
申请日期 |
2009.10.15 |
申请人 |
YANG TA-YUNG;WANG CHOU-SHENG;LU RUI-HONG;SYSTEM GENERAL CORPORATION |
发明人 |
YANG TA-YUNG;WANG CHOU-SHENG;LU RUI-HONG |
分类号 |
H02M3/335 |
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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