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BQ25882: How to set a capacitor for boot strap.

Kengo.Y
Guru 11255 points
Part Number: BQ25882

Hi team.

I'd like to select a capacitor for BTST to SW.

1.  Are there any recommended value capacitance range for BTST to SW?

2. How much is the maximum voltage will biased at BTST to SW?

Sincerely.

Kengo.

  • 0
    TI__Guru**** 166336 points

    Hi Kengo,

    The only tested and therefore recommended value is 0.047uF.  The maximum voltage is the SW voltage (SYS) plus REGN.  Therefore, we recommend at least 1.5 X V(SW+REGN) to account for ceramic capacitor DC bias effects.  The EVM uses a 25-V rated capacitor.

    Regards,

    Jeff