请教各位专业人士,UC3842作为电压模式运行时,这部分电路是什么作用,不太明白
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HI
如果PWM dutymax超过50%是需要增加这个斜波补偿电路的,如果dutymax不超过50%就不需要。
Hi
你需要确认一下,这个电路是电流模式,还是电压模式下运行。
HI
Datasheet有描述: The oscillator timing capacitor CCT is used to generate a sawtooth waveform on both current or voltage mode ICs. To use the UCx84x in a voltage mode configuration, this sawtooth waveform will be input to the current sense input, ISENSE, for comparison to the error voltage at the PWM comparator.