Nokia 9210i Servicehandbuch
PAMS
Technical Documentation
RAE-5
3. RF+System Module KL8
Page 3 – 25
Issue 1 04/02
Power Control and Reset
In normal operation the system HW is powered from the main battery. An exter-
nal charger can recharge the battery while also supplying power to RAE-5. The
supplied charger is so called performance charger (ACP–12), which can deliver
850mA.
nal charger can recharge the battery while also supplying power to RAE-5. The
supplied charger is so called performance charger (ACP–12), which can deliver
850mA.
The power management circuitry provides protection against over–voltages,
charger failures and pirate chargers etc. that would otherwise cause damage to
RAE-5.
charger failures and pirate chargers etc. that would otherwise cause damage to
RAE-5.
Following chapters give an overview about power management issues.
Power Distribution
Figure 4 describes the power distribution of RAE-5.
Power supply components – CCONT, VBB, Vcore, VACC and VMMC regula-
tors – and the audio amplifier are powered with main battery voltage. Main bat-
tery voltage is also fed to RF part for RF power amplifier (PA) and to the UI
module for backlight and LCD supply.
tors – and the audio amplifier are powered with main battery voltage. Main bat-
tery voltage is also fed to RF part for RF power amplifier (PA) and to the UI
module for backlight and LCD supply.
Separate linear regulator generates the 2.8V VBB power supply. VBB powers
most of the system HW portions including MADLinda, SDRAM, DOC and Serial
Flash memories, COBBA_GJP’s digital supply and the logic parts of the IR
transceiver. It also supplies 2.8V to the UI module.
most of the system HW portions including MADLinda, SDRAM, DOC and Serial
Flash memories, COBBA_GJP’s digital supply and the logic parts of the IR
transceiver. It also supplies 2.8V to the UI module.
Separate DC/DC regulator generates the 1.8V Vcore voltage. Vcore is used as
supply for the MADLinda and XIP memory core voltage and as IO voltage for
XIP and DOC memories.
supply for the MADLinda and XIP memory core voltage and as IO voltage for
XIP and DOC memories.
CCONT’s V2V output is used as enable for VBB and Vcore regulators.
VSIM regulator of CCONT is used to generate either 3V or 5V supplies for SIM
card. This is required so that RAE-5 can support both 3V and 5V SIM cards.
card. This is required so that RAE-5 can support both 3V and 5V SIM cards.
VR6 generates the voltage for COBBA_GJP’s analogue part.
CCONT generates the reference voltage VREF for COBBA_GJP and HAGAR.
It also generates the 5V supply voltage (V5V) for RF. In RF side there is sepa-
rate regulator that drops this voltage to 4.7V for DCT4 RF use.
It also generates the 5V supply voltage (V5V) for RF. In RF side there is sepa-
rate regulator that drops this voltage to 4.7V for DCT4 RF use.
Regulators VR1 to VR5 inside CCONT generate voltages for RF HW. Regulator
control signals come from MADLinda.
control signals come from MADLinda.
Separate 3V linear regulator is used to power the MMC card.
Another 3V linear regulator is used to generate accessory power that can be
fed through system connector for external accessory.
fed through system connector for external accessory.