Battery Charging And Management - Quectel SC262R Series Hardware Design

Table 7: Power Description
Pin Name
LDO5_1V8
5
LDO6_1V8
LDO10_2V85
LDO17_2V85
LDO16_2V8
SD_LDO12
SD_LDO11
USIM1_VDD
USIM2_VDD

3.8. Battery Charging and Management

SC262R 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.
5
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.
SC262R_Series_Hardware_Design
Default Voltage (V)
1.8
1.8
2.85
2.85
2.8
1.8/2.95
2.95
1.8/2.95
1.8/2.95
Driving Current (mA)
20
150
150
450
55
50
800
55
55
Smart Module Series
@ Idle State
Keeps ON
-
-
-
-
-
-
-
-
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