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TPS65261: TPS65261 hiccup

Koen Ven, van de
Prodigy 90 points
Part Number: TPS65261

Would it be possible to disable hiccup mode for the TPS65261 by lowering SS voltage or toggling EN within 256 switching cycles?

If not, are there other means of disabling hiccup mode?

Otherwise, is there a triple buck available without hiccup mode?

For an application I would like to use 1 buck channel to charge a supercap in constant current mode.

Thanks.

  • 0
    TI__Genius 15135 points

    Hi, Sir 

    Toggling EN within 256 cycles can make IC re-startup, which can shorten hiccup wait time(256 cyles) when OCP happens. 

    However, there is no means to disable hiccup mode. 

    How much value of supercap? 

    Theoretically, we can enlarge soft start time(increase SS cap) to avoid triggering OCP when driving supercap. 

  • 0 in reply to Zhao Ma
    Prodigy 90 points

    Hi Zhao,

    If possible I would like to charge 2 series connected 35-50F supercaps by one channel.

    If the EN pin is toggled does this immediately reset the hiccup counter? For example would a 10-100us pulse on EN be sufficient to restart the channel?

    So the OCP counter is also active during softstart?

    Thanks.

  • 0 in reply to Koen Ven, van de
    TI__Genius 15135 points
    Hi, Sir

    Yes, EN toggling can reset hiccup timer immediately.
    Yes, OCP timer keeps active all the time.
    I think using buck converter cannot charge this huge supercaps, suggest using charger IC to do this.