Smart Module Series
SC200R&SC262R_Series_Hardware_Design 46 / 124
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.
I/O
Description
Comment
BAT_SNS
133
AI
Battery voltage detect
The maximum input voltage is 4.2 V.
BAT_THERM
134
AI
Battery temperature detect
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.
BAT_ID
185
AI
Battery type detect
Internally pulled down with a 100
kΩ
resistor.
If it is not used, keep it open.
NOTE