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TL494: TL494 cannot control current when used in current limiting circuits

JINCHENG WEN
Prodigy 10 points
Part Number: TL494


I used TL494 in my circuit to limit the charging current of the battery. The original circuit worked normally, but when I removed capacitor C157, the current value was incorrect. Why is this？TKS！

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  • 0
    TI__Mastermind 42700 points

    May I know what the intention is behind removing the capacitor? or Are you just curious as to why there's difference?

    JINCHENG WEN 说：
    current value was incorrect

    Just to confirm, by current limit, you mean "I1+", right?

    Could you please clarify what you mean by "incorrect"? What difference you see? 

    To investigate this further, please share the waveforms (for both cases: with and without the capacitor) of "MOS_DRV1", "E1", "I1+", and "OUT-" in one screen.