Nokia 8208, Руководство по обслуживанию

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RM-384
System Module and User Interface
Page 5-22 Company Confidential Issue1
Copyright © 2009 Nokia. All rights reserved.
Power distribution
In normal operation, the baseband is powered by the mobile terminal‘s battery pack. The battery pack consists
of one lithium-ion cell with a capacity of 860 mAh and safety and protection circuits.
The PMIC controls the power distribution to the whole mobile terminal, which includes the baseband and the
RF regulators, but excludes the RF power amplifier (RF PA) RF power amplifier drains power from the battery
directly. The battery provides power directly to the following parts of the system:

PMic

RF PA

Flash LED driver IC

Power Key

Camera driver IC

Audio amplifier
The heart of the power distribution is the power control block inside the PMIC. It includes all the voltage
regulators and feeds the power to the entire system.
The baseband is powered by the following PM regulators:
Regulator Rating Current Voltage Notes
MSMC 800 mA 1.27 V Always enabled except during power-off mode
MSMA 300 mA 2.60 V
Enabled only when the system is powered on (Off during
sleep and power-off modes)
MSMP 300 mA 2.60 V Always enabled except during power-off mode
RUIM 150 mA 3.0 V Enabled only when RUIM card is used
TCXO 80 mA 2.85 V
Enabled only when the system is powered on (Off during
sleep and power-off modes)
Note: All output regulators voltage ac/-2%
Table 30 Baseband Regulators
Below table includes the PM regulators for the RF.
Regulator Rating Current Voltage Notes
Note: All output regulators voltage ac/-2%
Table 31 RF Regulators