TPS3430: increase reset pulse duration

joao martins

Part Number: TPS3430

the datasheet states "WDO delay time can be set to any value between 700 μs (CCRST = 100 pF) and 3.2 seconds (CCRST = 1 μF)"

I need at least 5s for reset. Is it really not possible to use a 2.2uF cap in CCRST?

thanks

over 1 year ago

+1 Joshua Garcia over 1 year ago

TI__Genius 11740 points

Hi Joao,

The recommended maximum reset delay capacitor value is to make sure that there is enough time for capacitor to fully discharge when a voltage fault occurs so that consecutive faults may all have the same programmed reset delay. Our TPS3436BFACADDFRQ1 device is our latest and greatest standalone window watchdog and has a capacitor adjustable reset time up to 8.91 seconds.

Thanks,
Joshua

0 joao martins over 1 year ago in reply to Joshua Garcia

Prodigy 50 points

Thanks Joshua.

I understand and thanks for the alternative part, I will take a look.

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TPS3430: increase reset pulse duration