Product Info

Smart Module Series
SC600Y&SC600T Hardware Design
SC600Y&SC600T_Hardware_Design 44 / 134
3.8. Battery Charge and Management
SC600Y/SC600T supports a fully programmable switch-mode Li-ion battery charge function. It can
charge single-cell Li-ion and Li-polymer batteries. The battery charger of SC600Y/SC600T 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 75mA trickle charging current is applied
to the battery.
 Pre-charge: When the battery voltage is charged up and exceeds 2.1V (the maximum pre-charge
voltage is 2.3V~3.0V programmable, 3.0V by default), the system will enter into pre-charge mode.
The charging current is 250mA (100mA~450mA programmable, 250mA by default).
 Constant current mode (CC mode): When the battery voltage is increased to between the
maximum pre-charge voltage and 4.35V (3.6V~4.35V programmable, 4.35V by default), the system
will switch to CC mode. The charging current is programmable from 300mA~3000mA. The default
charging current is 500mA for USB charging and 2A for adapter.
 Constant voltage mode (CV mode): When the battery voltage reaches the final value 4.35V, the
system will switch to CV mode and the charging current will decrease gradually. When the charging
current reduces to about 100mA, the charging is completed.
Table 9: Pin Definition of Charging Interface
Pin Name Pin No. I/O Description Comment
USB_VBUS 41, 42 PI/PO
Charging power input
Power supply output for OTG device
USB/charger insertion detection
Vmax=10V
Vmin=4.0V
Vnorm=5.0V
VBAT
36, 37,
38
PI/PO Power supply for the module
Vmax=4.4V
Vmin=3.55V
Vnorm=3.8V
BAT_ID 17 AI Battery type detection
If unused, keep this
pin open.
BAT_PLUS 27 AI
Differential input of battery voltage
detection (+)
Must be connected.
BAT_MINUS 28 AI
Differential input of battery voltage
detection (-)
Must be connected.
BAT_THERM 29 AI Battery temperature measurement
Internally pulled up.
Externally connected
to GND via a 47KΩ
NTC resistor.