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About delay time of TPS3808G01

Satoshi
Guru 19495 points

Please let me know about delay time of TPS3808G01.

If connect 47kΩ between 5V and CT pin, is this resister influence delay time?

(Schematic is attached below, please see red area)

Best regards,

Satoshi

  • 0
    TI__Guru 55940 points
    Hi Satoshi,

    The reset delay time is determined by the time it takes for the external capacitor to reach 1.23V. The equations and descriptions in the datasheet assume that only the internal 220nA current source is used to charge the capacitor. By adding a pullup resistor, you are adding an additional current source. As a result, the capacitor will charge faster and the time delay will be shorter.

    Very Respectfully,
    Ryan