LG L705ix Service Manual page 39

3. TECHNICAL BRIEF
3.9.3 Charging control
A programmable charging block in PM6650 is used for battery charging. It is possible to set limits for
the charging current. The external supply typically connects directly to pin (VCHG).
The voltage on this pin (VCHG) is monitored by detection circuitry to ascertain whether a valid external
supply is applied or not. For additional accuracy or to capture variations over time, thism voltage is
routed internally to the housekeeping ADC via the analog multiplexer. PM6650 circuits monitor
voltages at VCHARGER and ICHARGE pins to determine which supply should be used and when to
switch between the two supplies. These pins are connected to the Source (or emitter) and Drain (or
collector) contacts of the pass transistor respectively.
[Call]3.70V ± ± 0.05V
[Idle]3.7 5V ± ± 0.05V
LGE Internal Use Only
[Call]3.58V ± ± 0.05V
[Call & Idle]3.25 ± ±
[Idle]3.6 3V ± ± 0.05V
L705iX Battery Bar Display
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0.05V
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