发明申请
- 专利标题： Switching control circuit for primary-side controlled power converters
- 专利标题（中）： 初级侧电源转换器的开关控制电路
-
申请号： US10943318申请日： 2004-09-16
-
公开(公告)号： US20060056204A1公开(公告)日： 2006-03-16
- 发明人: Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Chuh-Ching Li , Shao-Wei Chiu
- 申请人： Ta-yung Yang , Guo-Kiang Hung , Jenn-yu Lin , Chuh-Ching Li , Shao-Wei Chiu
- 主分类号： H02M5/27
- IPC分类号： H02M5/27
摘要：
The present invention discloses a switching control circuit for a primary-side controlled power converter. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by measuring a primary-side switching current. An integrator generates a current-feedback signal by integrating the current-waveform signal with the discharge time. A time constant of the integrator is correlated with the switching frequency, thus the current-feedback signal is proportional to an output current of the power converter. A PWM circuit controls the pulse width of the switching signal in response to the outputs of a voltage-loop error amplifier and a current-loop error amplifier. The output voltage and the maximum output current of the power converter are therefore regulated.
公开/授权文献
信息查询
IPC分类:
