Quectel SC262R Series Hardware Design page 43

Table 8: Pin Definition of Charging Interface
Pin Name Pin No.
BAT_SNS 133
BAT_THERM 134
BAT_ID 185
CHG_SEL 127
SC262R series module supports battery temperature detection in the condition that the battery integrates
a thermistor (47 kΩ 1 % NTC thermistor with a B-constant of 4050 K by default) and the thermistor is
connected to BAT_THERM pin. If the BAT_THERM pin is not connected, there will be malfunctions such
as battery charging failure, battery level display error, etc. The default battery temperature range is
-3.0 ° C to 48.5 ° C.
A reference design for the battery charging circuit is shown below.
VBAT
NTC
GND
Battery
Figure 11: Reference Design for Battery Charging Circuit
Mobile devices such as mobile phones or handheld POS systems are powered by batteries. For different
SC262R_Series_Hardware_Design
I/O Description
Sensed battery voltage for
AI
charger circuits
AI Battery temperature detect
AI Battery type detect
DI Charging select
1
2
3
D2
D1
C4
NM_1 nF
ESD
ESD
Comment
The maximum input voltage is 4.2 V.
Internally pulled up.
Supports 47 kΩ NTC thermistor by
default - externally connect it to the
47 kΩ NTC thermistor.
If it is not used, connect it to GND
with a 47 kΩ resistor.
Internally pulled down with a 100 kΩ
resistor.
If it is not used, keep it open.
If you use an internal charging chip,
keep this pin open.
If you use an external charging chip,
connect it to GND.
Adapter or USB
R1
0R
C1 C2 C2 C3
100 μF 1 μF 1 μF
33 pF
Smart Module Series
USB_VBUS
VBAT
BAT_SNS
BAT_THERM
GND
Module
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