3. TECHNICAL BRIEF
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Only for training and service purposes
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3.9.3.2 Constant Current Charging
The PMIC supports constant current charging of the main battery by closing the battery MOSFET (connecting
the battery to VDD), and closed-loop controlling the charging pass transistor. If current limiting is not
implemented by the external supply, the closed-loop control regulates the total current (handset electronics
plus charging current) to match the programmed value (IMAXSEL).
Software monitors the charging process as described earlier and continues the constant current mode until the
battery reaches its target voltage. Charging of Li-ion batteries require further charging using constant voltage or
pulse techniques for top-off and maintenance.
G
PM8058 Charging Flow (CC Charging) : 1/2