Lenovo G560 Compal LA-5752 charger stops with overcurrent

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  • Hexel
    Member
    • Jan 2019
    • 15
    • Ukraine
    #1

    Lenovo G560 Compal LA-5752 charger stops with overcurrent

    Hello!

    Need help in troubleshooting notebook G560. When with battery, charger ISL6521 starts charging, and after few seconds, when CHLIM input (current setpoint from EC) reaches 250mV, charger shuts down with audible click. After ~5ms EC turns off adapter input (ACOFF is asserted) and switch to battery input.
    When with only adapter, or battery, no problem.
    Tried different batteries, adapters. ISL, charger mosfets, bootstrap caps are replaced, no effect. Its nothing else issue, as process interrupts when ADP_I signal peaks and charger PWM pulses disappers. After that, EC puts EN input to ISL low.
    Maybe, any ideas?
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