LG -A100 Service Manual page 22

3. TECHNICAL BRIEF
The ADC and the oscillator for the ADC needs the VDD_ADC supply voltage from the LADC LDO. LADC uses
either the charger voltage VDD_CHARGE or VDDRTC as input voltage. The input voltage is selected
automatically by a bulk switch circuit. LADC, the ADC and the oscillator are enabled on request for every battery
measurement if the charger unit is not running. This is handled by an ADC control block in one of the state-
machines. If the charger unit is running the ADC is controlled by the charger state-machine
Figure.3.2.1 First Part of the State Machine, Running in Different Power Domains than the Second Part
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