Quectel Smart EVB G2 User Manual

Smart LTE Module Series
Smart EVB G2 User Guide
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Table 4: Pin Definition of Battery Interface
Figure 12: Battery Assembly
4.1.3. Modification for Powering on Module with DC Adapter Only
Smart modules can be powered on directly through VBAT when the battery is present. But when the
battery is not available, and the module can only be powered by DC adapter, the module will boot first and
then detect if there is a battery by detecting whether there is a thermistor between ground and
BAT_THERM pin with the battery pack thermal monitor. If no battery is detected, the module will assume
that there is no available power supply and shut down automatically. So if customers want to power on
the module only with DC adapter when battery is not available, the following modification should be made:
keep battery not assembled, remove the TVS on D0209 and mount a 47K resistor of 0402 package size
on D0209.
Pin No.
Pin Name
Description
Comment
1
VBAT
Power input pin.
Connect to the positive pole of the battery.
2
NTC
Used for battery temperature detection.
A 47K thermistor can be used for the battery protection circuit.
3, 4, 5
GND
Ground pins.
Pin 3 is connected to the negative pole of the battery.
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Quectel Smart EVB G2 Specifications

General

Brand	Quectel
Model	Smart EVB G2
Category	Motherboard
Language	English