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FIBOCOM SU806 Series Hardware Guide
Page 42 of 86
ADC4_BAT
_ID
260
AI
BAT_ID detection
-
3.12
Battery Power Supply Interface
SU806D-EAU series module just support circuit modes coulomb counter fuel gauge, if use coulomb
counter IC externally, please connect
SENSE_P and SENSE_N pin to GND.
Table 3-16 Battery power supply pin definition
Pin Name
Pin Num I/O
Description
Note
CHARGE_SEL
127
DI
Charge modes select
Reserved
VBAT_SNS
133
AI
Battery voltage sense
-
VBAT_THERM
134
AI
Battery thermal detect input
NTC resistor is 47K
SENSE_N
258
AI
Battery fuel gauge negative input
Reserved
SENSE_P
259
AI
Battery fuel gauge positive input
Reserved
Fuel gauge reference design is shown in the following figure:
VBAT
VBAT_SNS
Module
VBAT_THERM
SENSE_P
SENSE_N
GND
B
a
tte
ry
C
o
n
n
e
ct
o
r
VBAT
THERM
GND
20
m
Ω
±
1
%
Figure 3-14 Fuel gauge reference design
Trace routing of SENSE_P and SENSE_N should follow differential rule.
Note:
