Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 48 / 118
3.7. Power Output
SC66 supports output of regulated voltages for peripheral circuits. During application, it is recommended
to use parallel capacitors (33pF and 10pF) 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 battery. Switching charging with Quick Charge 3.0 and 4.0 supports up to
3 A.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 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 into
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
Follow VBAT
1000
Keep