Battery Temperature Measurement - LG TU750 Service Manual

3.5.2 Battery Temperature Measurement

The BDATA node, the constant current source, feed the battery data output while monitoring the
voltage at the battery data node with GPADC. This battery data is converted to the battery
temperature. (Fig.2-5-5) shows the schematic of battery temperature measurement part.
D303
C1
1
A1_C2
3
A2
2
C340
KDS221E_RTK
22p
Name
BDATA
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C334 C335
22p 33u
R319
300K
Fig 3-5-5. Battery Temperature Measurement
Type
Digital Input/Output
Table 3-5-3 BDATA channel spec
SRST_n
SCLK
SDAT
BDATA
FGS+
FGS-
BDATA
VBAT_D
Unused
Unconnected
- 65 -
3. TECHNICAL BRIEF
M2
SRST_N
M1
SCLK
N3
SDAT
A11
BDATA U301
J14
FGSENSEP
AB3100
C325
47p
J13
FGSENSEN
G2
VBAT_D
Description
current output
LGE Internal Use Only