Nokia RM-627, Руководство по обслуживанию

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GND (Ground)
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VBAT (Battery voltage)
The BSI line is used to recognize the battery capacity by a battery internal pull down resistor.
Figure 31 Blade battery connector
Charging
This phone is charged through the micro USB interface.
Charging is controlled by EM ASIC (N2200), and external components are needed to protect the baseband
module against EMC, reverse polarity and transient frequency deviation.
Charging a dead battery
Charging of a dead battery has to be carried out via an approved NOKIA charger. Charging of a dead battery
via a PC is not allowed, since this procedure does not including a current regulator (the battery can be charged
with a too high current level).
Normal and extreme voltages
Energy management is mainly carried out in the EM ASIC (N2200). that contains a number of regulators. In
addition there are also some external regulators.
In the table below normal and extreme voltages are shown when a BL-5F battery is used.
Table 10 Nominal voltages
Voltage Voltage [V] Condition
General Conditions
Nominal voltage 3.700
Lower extreme voltage 3.145
Higher extreme voltage
4.230 (fast charging)
HW Shutdown Voltages
Vmstr+ 2.1 ± 0.1 Off to on
Vmstr- 1.9 ± 0.1 On to off
SW Shutdown Voltages
Sw shutdown 3.1 In call
Sw shutdown 3.2 In idle
Min Operating Voltage
Vcoff+ 2.9 ± 0.1 Off to on
Vcoff- 2.6 ± 0.1 On to off
RM-627
System Module
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