Read Panasonic KX-TCA285RU Service Manual online
9
KX-TCA285RU
• The charge current is controlled by IC203 of Handset.
Charge current characteristic is as follows.
Charging method is CCCV. (CC: constant current, CV: constant voltage)
Charging method is CCCV. (CC: constant current, CV: constant voltage)
• IC100-88pin (CHG_state)
• When handset is put on charger, handset detects battery charge.
• TH(IC203-6pin) is temperature detecting pin of battery.
The charge temperature range is 5 degree C to 40 degree C.
If charge temperature is above 40 degree C or below 5 degree C, charge stops.
If charge temperature is above 40 degree C or below 5 degree C, charge stops.
4.2.7.
Battery Low/Power Down Detector
"Battery Low" and "Power Down" are detected by BBIC (IC1) which checks the battery voltage.
The detected voltage is as follows;
The detected voltage is as follows;
• Battery Low
Battery voltage: V(Batt) 3.4V ± 50mV
The BBIC detects this level and "
“ starts flashing.
• Power Down
Battery voltage: V(Batt) 3.2V ± 50mV
The BBIC detects this level and power down.
The BBIC detects this level and power down.
IC100-88pin (CHG_state)
Charge controll
High
Charging
Low
Charge complete
Charge detect
IC1-24pin (CHG_DET)
Charge LED (Red LED)
ON
Above 1.5V
ON
OFF
Below 1.2V
OFF
Charge
Battery temperature
ON
0
C to 40 C
OFF
Below 5
C or above 40 C
CC charge
CV charge
Charge stop
CC charge
CV charge
Charge stop
I mA
I/10 mA
4.2 V
3.97 V
t
V, I
Battery voltage
Charge current
0 mA
0 V
Charge complete
Recharge
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