User Guide

RH-26
2 - System Module CCS Technical Documentation
Page 20 ©Nokia Corporation Issue 1 02/04
Figure 4: Interconnection diagram
Charging
Supported chargers are ACP-7, ACP-8, ACP-9, ACP-12, LCH-8, LCH-9 and LCH-12.
Charging is controlled by the UEMK ASIC. External components are needed for current
sensing, EMC, reverse polarity and transient protection of the input to the baseband
module. The charger is connected to the system connector interface. The RH-26 base-
band is designed to support DCT3 chargers. Both 2- and 3-wire type chargers are sup-
ported.
The operation of the charging circuit has been specified in such a way as to limit the
power dissipation across the charge switch and to ensure safe operation in all modes.
Overcharge /
Overdischarge
protection
VBATT
BSI
GND
Li-Ion