Energy Management; Battery And Charging - Nokia N900 Service Manual

RX-51
System Module
Function
Front camera

Energy management

Battery and charging

Battery
Supported battery type is BL-5J.
Battery connector
Blade battery connector type.
• VBAT (Battery voltage)
• BSI (Battery size indication)
• GND (Battery ground)
Charging
Dead battery charging
Weak battery
This phone is charged through the micro USB connector. The phone supports dedicated, host or hub chargers.
Charging is controlled by energy management, and external components are needed to protect the baseband
module against EMC, reverse polarity and transient frequency deviation. USB charging circuit consists of USB
charging chip BQ24150 and USB transceiver ISP1707. USB wall charger is detected with ISP1707 USB
transceiver. It can directly control BQ24150 to 500mA charging mode.
Issue 1
Description
VGA SMD camera
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