| 摘要 |
控制电路包含一辅助接脚，用以接收一电源转换器之一辅助绕组的辅助电压；一第一侦测单元，用以侦测该辅助电压开始共振之一第一时间，并根据该第一时间输出一第一侦测信号；一第二侦测单元，用以侦测该辅助电压到达一预定电压之一第二时间，并根据该第二时间输出一第二侦测信号；一延迟时间控制器，用以根据该第一侦测信号及该第二侦测信号之输出时间差得到一延迟时间，及于收到该第二侦测信号并经过该延迟时间后输出一开启信号；及一闸极信号产生器，用以根据该延迟时间控制器之开启信号，产生一闸极控制信号至该电源转换器之一功率开关。; a first detection unit for detecting a first time point when the auxiliary voltage begins resonance, and outputting a first detection signal according to the first time point; a second detection unit for detecting a second time point when the auxiliary voltage reaches a predetermined voltage, and outputting a second detection signal according to the second time point; a delay time controller for obtaining a delay time according to a output time difference between the first detection signal and the second detection signal, and outputting a driving signal with the delay time later when receiving the second detection signal; and a gate control signal generator for generating a gate control signal to a power switch of the power converter according to the driving signal of the delay time controller. |
