Battery Charging And Management - Quectel SC200R Series Hardware Design

NOTE
1)
When the module is in sleep mode, LDO6_1V8 wakes up periodically or randomly. Considering the
actual requirement for power consumption during sleep mode, you can use either LDO6_1V8 or an
external LDO for power supply. If you require lower power consumption during sleep mode, use an
external LDO for power supply.

3.8. Battery Charging and Management

SC200R series module supports battery charging. The battery charger IC in the module supports trickle
charging, constant current charging and constant voltage charging modes, which optimize the charging
procedure for Li-ion batteries.
⚫
Trickle charging: There are two steps in this mode. When the battery voltage is below 2.8 V, a
90 mA trickle charging current is applied to the battery. When the battery voltage is charged up and is
between 2.8 V and 3.2 V, the charging current can be set to 450 mA maximally.
⚫
Constant current mode (CC mode): When the battery is increased to 3.2–4.2 V, the system will
switch to CC mode. The maximum charging current is 1.44 A when an adapter is used for battery
charging, and the maximum charging current is 450 mA for USB charging.
⚫
Constant voltage mode (CV mode): When the battery voltage reaches the final value 4.2 V, the
system will switch to CV mode and the charging current will decrease gradually. When the battery
level reaches 100 %, charging is completed.
Table 11: Pin Definition of Charging Interface
Pin Name Pin No.
BAT_SNS 133
BAT_THERM 134
BAT_ID 185
SC200R&SC262R_Series_Hardware_Design
I/O Description
AI Battery voltage detect
AI Battery temperature detect
AI Battery type detect
Smart Module Series
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.
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