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4-5 Desk-Top Rapid Charger
4-5-1 Description
This specification describes requirements of
DTC55 desktop charger. DTC55 is designed as
desk-top rapid charger for Li-ion battery for
SAMSUNG PCS Cellular phone SCH2000.
This charger include AC/DC adapter circuitry in
its own board. This characteristic offers operating
with direct indoor AC input without additional
AC/DC adapter unit.
Integrated AC/DC adapter circuitry adopts
switching mode power supply to keep lightness of
whole charger.
And it has two battery slot, the front one is
intended for cellular phone with battery and rear
one is for another battery only. Two bi-color LED
include charging status of each battery slot.
Charging current is automatically controlled by
programmed microprocessor inside of charger, to
proper to each type of battery.
Samsung Electronics
4-5-2 Electrical Characteristic
AC IN PUT
¶UAC input voltage : 110/220Vac
¶UAC input voltage : 85Vac ~ 264Vac
¶UAC input frequency : 60Hz
¶UAC input ON/OFF cycle : MIN 5 sec
OUT PUT
¶UBattery Charging Method : CC-CV mode
¶UBattery Charging Current Range under CC
mode
800mA °æ 70mA
-Front slot :
400mA °æ 50mA
-Rear slot :
¶UBattery Charging Voltage Range under CC
mode
-Front slot voltage setting (V/F : 5.1K)
4.1 °æ 0.05 VDC with 110Vac input and 180mA
load current.
- CV mode 4.05V ~ 4.15V
- Voltage range (4.05V ~ 4.15V), is to be tested
with 180mA ~ 600mA load range for Front slot.
- Rear slot voltage (V/F : 5.1K)
- CV mode 4.0V ~ 4.15V at 150mA load
¶URipple & Noise
- Ripple & Noise Lim it : 60mVp_p MAX
- Test Condition
- Front : At output contact with 20MHz
bandwidth using resistive load 650mA and
nominal input.
¶UEfficiency
- 55% MIN
- Efficiency is to be tested with 650mA and
150mA resisted load and 110Vac input.
Circuit Description
4-7
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