Identifying single cell Li-ion charger IC

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  • martonmiklos
    Member
    • Jun 2021
    • 20
    • Hungary
    #1

    Identifying single cell Li-ion charger IC

    I am trying to repair an Autec A08 remote which does not turn off and depleting the battery
    I spotted a burn mark on the li-ion charger IC what I removed, and after the removal the power ON LED is no longer continously on, however it does not turn on at all.
    I traced the enable signal of the VBA - 3V3 DCDC LM3674 converter and it is wired to the charger IC through some passive network.

    Likely to disable the power for the MCU/RF part during charging in the bay.

    After investigating the IC further I got to the following:

    The markings were barely visible as the board was coated, my best readout from the IC was:
    AAAC
    1702

    I have attached an photo from the IC itself but it is quite useless in quality.

    The board itself is made from mostly western semiconductors (Atmega128A, MSP430, LM3674).

    Does anyone has a good tip about what type of IC could it be?
    Attached Files
    Tags: None
    • martonmiklos
      Member
      • Jun 2021
      • 20
      • Hungary
      #2
      For the shake of posterity: finally figured out: MCP73833-FCI/MF

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