Normal And Extreme Voltages - Nokia RM-632 Service Manual

• GND (Ground)
• VBAT (Battery voltage)
The BSI line is used to recognize the battery capacity by a battery internal pull down resistor.
Charging
This phone is charged through the smaller Nokia standard interface (2.0 mm plug). The wider standard
charger plug (3.5 mm) can be used together with a CA-44 charger adapter.
The phone can also be charged via USB using CA-101 or a USB charger e.g. AC-6.
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. If the phone is charged via
USB, CA-101 or preferably an AC-6 must be used.

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-4D battery is used.
Voltage
Nominal voltage
Lower extreme voltage
Page 5 – 8
Figure 28 Blade battery connector
Figure 29 Small (right) and wide (left) charger plugs
Table 9 Nominal voltages
Voltage [V]
General Conditions
3.700
3.145
COMPANY CONFIDENTIAL
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RM-632; RM-634; RM-699
Condition
System Module
Issue 3