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Synconizing TPS55330 with LM27403

Andreas Ramseier
Prodigy 250 points
Other Parts Discussed in Thread: LM27403, TPS55330

Hi

I would like to clock both with 350Hz. Is it a way to sycroniize both with 350Hz without an external clock? For example the internal clock of LM27403 to TPS55330?

Thank you very much for help

Andy

  • 0
    TI__Mastermind 35165 points

    You may be able to use the LM27403 switching node to generate a signal to synchronize the TPS55330. However you will need to watch out how this signal would change for all of the operating conditions of the LM27403, such as fault conditions. I'm not very familiar with the LM27403 to say any specific cases to watch out for.  If the switching node changes from a regular 350 kHz signal the TPS55330 would try to follow it causing it to also behave differently.

  • 0 in reply to Anthony F
    Prodigy 250 points

    Thank's Anthony

    May i ask another question to you or somebody else who is familiar with the LM27403?

    I would like to disable the OCP. The comparator may must have a voltage difference for about 20mV. So my thought is to shortcircuit CS- to CS+ with a resistor (6K). I have shorted D+ to D- also. so the current limit offset current  is about 5uA (see 7.5 on the manual) and with a 6K Resistor i will have about 30mV.

    Or do i have supply the CS+ with voltage from VIN?

    Thank's for verify my thoughts

    Andy