Nokia 6150 Manuales De Servicio
PAMS
Technical Documentation
NSM–1
System Module
Page 3–19
Original 10/98
Baseband Power Distribution
Functional Description
In normal operation the baseband is powered from the phone‘s battery.
The battery consists of three Nickel Metal Hydride cells. There is also a
possibility to use batteries consisting of one Lithium–Ion cell. An external
charger can be used for recharging the battery and supplying power to
the phone. The charger can be either a standard charger that can deliver
around 400 mA or so called performance charger, which can deliver sup-
ply current up to 850 mA.
The baseband contains components that control power distribution to
whole phone excluding those parts that use continuous battery supply.
The battery feeds power directly to three parts of the system: CCONT,
power amplifier, and UI (buzzer and display and keyboard lights). Figure
below shows a block diagram of the power distribution.
The battery consists of three Nickel Metal Hydride cells. There is also a
possibility to use batteries consisting of one Lithium–Ion cell. An external
charger can be used for recharging the battery and supplying power to
the phone. The charger can be either a standard charger that can deliver
around 400 mA or so called performance charger, which can deliver sup-
ply current up to 850 mA.
The baseband contains components that control power distribution to
whole phone excluding those parts that use continuous battery supply.
The battery feeds power directly to three parts of the system: CCONT,
power amplifier, and UI (buzzer and display and keyboard lights). Figure
below shows a block diagram of the power distribution.
The power management circuit CHAPS provides protection agains over-
voltages, charger failures and pirate chargers etc. that would otherwise
cause damage to the phone.
voltages, charger failures and pirate chargers etc. that would otherwise
cause damage to the phone.
CCONT
SIM
+
BOTTOM CONNECTOR
CHAPS
COBBA
BATTERY
PA SUPPLY
RF SUPPLIES
VBB
BASEBAND
VBAT
VCOBBA
VSIM
VBB
CNTVR
PWM
VBAT
PWRONX
PURX
VIN
UI
BACKUP
RTC
MEMORIES
MAD
LIM
VBB
Battery charging
The electrical specifications give the idle voltages produced by the ac-
ceptable chargers at the DC connector input. The absolute maximum in-
ceptable chargers at the DC connector input. The absolute maximum in-