Samsung VP-L900, Training Manual

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Circuit Operating Description
6-12 Samsung Electronics
(4) Battery Voltage Check
In order to detect a battery voltage, The BATTERY the REF and CHARGE REF must become the input.
(BATT REF: Pin 118 / CHARGE REF.IN: Pin 120).
- Remaining amount voltage of the battery it calculates.
- Justice of PRE END and END Point of battery.
- Charging mode decision of battery
(Trickle Change or Rapidity change)
A. Bettery Level Detect
120
118
133
IC601
MICOM
Battery B+
CHARGE REF. IN
BATT REF.
SS 3V
10k
Ω
1M
Ω
R451
470k Ω
R452
220k Ω
AV ref
EVER 3V
Battery Level Battery Voltage
100% ~ 90% 8.4V ~ 7.75V
90% ~ 60%
60% ~ 40%
40% ~ 20%
20% ~ 5%
5% below
END 0% 6.0V below
Fig. 6-11
<Table 6-8>