Nokia 9110 Service Manual
PAMS
Technical Documentation
RAE–2
Baseband
Page 2– 21
Original 02/99
Functional Descriptions
Power Management
Figure 9.
CMT power distribution
MAD
CHAPS
COBBA
Li–ion
PA SUPPLY
RF SUPPLIES
BASEBAND
VBATT
+
MEMORIES
VCOBBA
13MHz
CLK
CLK
RF
BS8
BS1
BS2
HF
VIN
CCONT
SIMCONN
CMT
UI
UI
BOTTOM CONNECTOR
BA
TT
.CONN
VREF
MAD
SYNPWR
VRX
VTX
VSYN
VCP
VREF
VCO
VBB
VSIM
PHASER
SCOTTY
Battery
3.6V
GND
AGND
HF–amp
CHARGER IF
VCORE
PURX
PWRKEYx
LIM
In normal operation the baseband is powered from the phone Li–ion bat-
tery. The battery consists of two Lithium–Ion cell connected in parallel.
An external charger is used for recharging the battery and supplying pow-
er to the phone. The charger is a ”performance travel charger” (Nokia
ACP–9) that can deliver supply current up to 850 mA . It is also possible
to use a standard travel charger (Nokia ACP–7). The ACP–7 delivers
only 400 mA which is too little for charging the battery during a call.
tery. The battery consists of two Lithium–Ion cell connected in parallel.
An external charger is used for recharging the battery and supplying pow-
er to the phone. The charger is a ”performance travel charger” (Nokia
ACP–9) that can deliver supply current up to 850 mA . It is also possible
to use a standard travel charger (Nokia ACP–7). The ACP–7 delivers
only 400 mA which is too little for charging the battery during a call.
The baseband contains components that control power distribution to the
CMT parts excluding those that use continuous battery supply. The bat-
tery feeds power directly to three CMT parts of the system: CCONT, pow-
er amplifier, and CMT UI. The figure above is the block diagram of the
power distribution.
CMT parts excluding those that use continuous battery supply. The bat-
tery feeds power directly to three CMT parts of the system: CCONT, pow-
er amplifier, and CMT UI. The figure above is the block diagram of the
power distribution.