Quectel SG560D Series Hardware Design page 46

Table 8: Pin Definition of Charging Interface
Pin Name
USB_VBUS
VBAT
BAT_P
BAT_M
BAT_THERM
BAT_ID
SG560D series module supports battery temperature detection in the condition that the battery integrates
a thermistor (100 kΩ ±1 % NTC thermistor with a B-constant of 4250 kΩ ±1 % by default) and the
thermistor is connected to BAT_THERM. If BAT_THERM is not connected, there will be malfunctions
such as battery charging failure, battery level display error.
SG560D_Series_Hardware_Design
Pin No. I/O
429–432 PIO
1–5 PIO
418 AI
419 AI
407 AI
410 AI
Description
USB/charger
insertion detection;
charging power
input;
Power output for
OTG device
Power supply for the
module
Battery voltage
detect (+)
Battery voltage
detect (-)
Battery temperature
detect
Battery ID detect
Smart Module Series
Comment
The maximum output
current in OTG mode is
1.5 A.
It must be able to provide
sufficient current up to
5.0 A.
It is suggested to use a
TVS diode for surge
protection.
Must be connected.
Internally pulled up.
Supports 100 kΩ NTC
thermistor by default.
Connect it to 100 kΩ NTC
thermistor.
If unused, connect it to
GND with a 100 kΩ resistor.
If not used, keep it
unconnected.
45 / 134