Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 49 / 139
3.7. Power Output
SC66 supports output of regulated voltages for peripheral circuits. During application, it is recommended
to connect a 33pF and a 10pF capacitor in parallel in the circuit to suppress high frequency noise.
Table 10: Power Description
3.8. Battery Charge and Management
SC66 module supports a fully programmable switch-mode Li-ion battery charge function. It can charge
single-cell Li-ion and Li-polymer batteries. Switching charging with Quick Charge 3.0 and 4.0 supports up
to 3.0A. The battery charger of SC66 module supports trickle charging, pre-charge, constant current
charging and constant voltage charging modes, which optimize the charging procedure for Li-ion and
Li-polymer batteries.
Trickle charging:
When the battery voltage is below 2.1V, a 45mA trickle charging current is applied
to the battery.
Pre-charge:
When the battery voltage is charged up and is between 2.4V and 3.0V (the maximum
pre-charge voltage is 2.4V~3.0V programmable, 3.0V by default), the system will enter pre-charge
mode. The charging current is 500mA (100mA~1500mA programmable, 500mA by default).
Pin Name
Default Voltage (V)
Drive Current (mA)
Idle
LDO13A_1P8
1.8
20
Keep
LDO11A_1P8
1.8
150
/
LDO3B_2P8
2.8
600
/
LDO7B_3P125
3.125
150
/
LDO14A_1P8
1.8
150
Keep
SD_VDD
2.95
600
/
SD_PU_VDD
2.95
50
/
USIM1_VDD
1.8/2.95
150
/
USIM2_VDD
1.8/2.95
150
/
VPH_PWR
Equal to VBAT voltage
1000
Keep
