发明名称 |
Transformer-isolated flyback converters and methods for regulating output current thereof |
摘要 |
A system and method for delivering regulated power and current to an output load has a flyback transformer having a primary winding and a secondary winding. The secondary winding delivers stored energy to the output load. An oscillator circuit is provided for generating a periodical signal. A switching circuit is coupled to the flyback transformer and the oscillator circuit for energizing the primary winding to a reference current level each cycle of the oscillator circuit. The oscillator circuit has an integrator for deriving a time integral of a voltage at the primary winding. The oscillator circuit has a peak detector coupled to the integrator for holding a peak value of the time integral. The oscillator circuit further has a ramp generator for producing a ramp signal. A comparator is provided for comparing the peak value with the ramp signal and generating the periodical signal whenever the ramp signal exceeds the peak value.
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申请公布号 |
US7561452(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20060557258 |
申请日期 |
2006.11.07 |
申请人 |
SUPERTEX, INC. |
发明人 |
MEDNIK ALEXANDER;TIRUMALA ROHIT;TAO ZHIBO |
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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