Samsung SCH-211 Service Manual page 36

Current detectION Circuit : R14, R15, R16,
U4
Battery charging current is changed voltage
through R14, R15, R16. This voltage inputed
u-COM to 16 times amplifiered through U4.
Voltage detectION circuit : U4
u-COM A/D through U4 pin 15 detected voltage.
5-9 CLA (Cigarette Lighter Adaptor)
5-9-1 Functional Specification
SUMMARY
This standard describes on the specifications of
CLA (Cigarette Lighter Adaptor) for the SCH-210
of SAMSUNG.
SCOPE
CLC includes the following two function.
Adapter function
It supplies power needed to operate Cellular
Phone with battery pack.
Charger function
Charger for battery pack.
Samsung Electronics-Contents may change without notice.
BATTERY TEMPERATURE DETECTION CIR-
CUIT : U4
Battery temperature detection determined temper-
ature by ues of thermistor resistor variation of bat-
tery by U4.
C C
URRENT LIMIT IRCUIT
When soft-change, current detection circuit limit-
ed current flow to battery, reference voltage more
than detected current, detected current and U4
internal reference voltage.
ELECTRONIC SPECIFICATION
Input voltage : 11~30V DC
(normal voltage 13.7V DC)
Output current
-HHP power and battery power setting : 8.2V DC
± 0.05V/0mA
-Output current : 0A to 660mA
-Current limit of this unit should be kept 660mA
± 40mA
-Output voltage range : 8.2V -0.4/+0.2
-LED green : 180mA ¡¾ 30mA
Ripple and noise : 100mVpp
Proper fuse capacity : 250V, 2A
Charge time
Small Capacity
Medium Capacity
Large Capacity
Circuit Description
: U4
about 2hrs.
about 3hrs.
about 41/2hrs.
5-15