Power Output; Charging Interface - Quectel SC206E Series Hardware Design

3.7. Power Output

The module supports output of regulated voltages for peripheral circuits. In applications, it is
recommended to use a 33 pF and a 10 pF capacitor in parallel in the circuit to suppress high-frequency
noise.
Table 8: Power Description
Pin Name Pin No.
LDO15A_1V8 111
LDO_IOVDD 125
VDD_2V8 129
LDO17A_3V0 156
SD_LDO21 38
SD_LDO4 32
USIM1_VDD 26
USIM2_VDD 21

3.8. Charging Interface

The 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 2.1 V, a 90 mA
trickle charging current is applied to the battery. When the battery voltage is charged up and is
between 2.1 V and 3.4 V, the charging current can be set to 400 mA maximally.
⚫
Constant current mode (CC mode): When the battery is increased to 3.4 to 4.2 V, the system will
switch to CC mode. The maximum charging current is 1.85 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 4.35 V, the
system will switch to CV mode and the charging current will decrease gradually. When the battery
level reaches 100 %, charging is completed.
SC206E_Series_Hardware_Design
Default Voltage (V)
1.8
1.8
2.8
3.0
2.95
1.8/2.95
1.8/2.95
1.8/2.95
Driving Current (mA)
200
300
500
192
841
22
67
67
Smart Module Series
@ Idle State
Keeps ON
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-
-
-
-
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