Battery Interface - Nokia 2630 RM-298 Service Manual

RM-298; RM-299
System Module
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
Issue 1
To Min
UEMCLite 0
Figure 114 BL-4B battery pack contacts
Table 15 Pin numbering of battery pack
Pin number
2
3
1
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Nom Max
2.78
Negative/common battery
terminal
Battery capacity measurement
(fixed resistor inside the battery
pack)
Positive battery terminal
Note
Analog input, Battery Size
Indicator Resistor, 100
kohm pull up to 2.78V
(VBB1). FDL Init, refer to
flash download.
Function
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