Battery Interface - Nokia RM-362 Service Manual

Signal From
BSI

Battery interface

• Type: BL-4B
• Technology: Li-Ion, 4.2 V charging, 3.1 V cut-off
• Capacity: 700 mAh.
BL-4B has a 3 pin interface with overcharge / discharge protection (safety circuit) and battery size indication
BSI with an internal resistor. The BSI fixed resistor value indicates type and default capacity of a battery.
Signal name
GND
BSI
VBAT
Page 6 –18
To Min
UEMCLite 0
Figure 113 BL-4B battery pack contacts
Table 13 Pin numbering of battery pack
Pin number
2
3
1
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
Nom Max
2.78
Negative/common battery
terminal
Battery capacity measurement
(fixed resistor inside the battery
pack)
Positive battery terminal
RM-362; RM-363
System Module
Note
Analog input, Battery Size
Indicator Resistor, 100
kohm pull up to 2.78V
(VBB1). FDL Init, refer to
flash download.
Function
Issue 1