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BQ25898D: About Behavior at system shorted

user777540
Expert 1020 points
Part Number: BQ25898D

Hello

In e2e below, there is "the HSFET cycle by cycle protection is typically around 8.5A with a minimum of around 6.4A."
Does the inductor current (average) when SYS is short-circuited continue to flow this much?
Or will it work in Hiccup mode?

e2e.ti.com/.../691968

best regards

  • 0
    TI__Guru 57781 points

    Hi,

    Referring to the d/s,

    9.2.15.3 System Overcurrent Protection

    When the system is shorted or significantly overloaded (IBAT > IBATOP) so that its current exceeds the overcurrent

    limit, the device latches off BATFET.

    Thanks,

    Ning.

  • 0 in reply to Ning T
    Expert 1020 points

    Hello

    Isn't 9.2.15.3 about supplying SYS to the battery?

    What I want to know is the behavior of the inductor current when SYS is short-circuited when applying, for example, 12V, 1.5A from VBUS.

    In e2e below, there is "the HSFET cycle by cycle protection is typically around 8.5A with a minimum of around 6.4A."
    Does the inductor current (average) when SYS is short-circuited continue to flow this much?
    Or will it work in Hiccup mode?

    e2e.ti.com/.../691968

    best regards

  • 0 in reply to user777540
    TI__Guru 57781 points

    Hi,

    The HSFET current limit is cycle-by-cycle peak-current control.

    Thanks,

    Ning.