SC824

10

Pin Descriptions

Pin #

Pin Name

Pin Function

1

VIN

Supply pin

high voltage up to 30V.

2

VSYS

System reference voltage supply

1μF capacitor connected between VSYS and GND.

3

MODE

Charging mode selection (tri-level logical) input

USB low power mode, ground selects adapter mode.

4

RTIME

Timer setting pin

timer. Connect to ground to disable the timer. Tie to VSYS to select the 3 hour CC timer using the internal oscilla-

tor.

5

GND

Ground

6STAT1

Status open drain output pin that is active low when charging is in progress, with or without a charging fault.

When charging is complete, pin is released. See STATx Pin Truth Table.

7STAT0

Status open drain output pin that is pulled low when a valid charging adapter is connected and the voltage is

greater than the UVLO level and less than the OVP level, and no charging fault is detected. Pin is released when

the input is disconnected from a power supply, or to indicate a charging fault. See STATx Pin Truth Table.

8

IPRGM

Charging current programming pin

Pre-charge current (also USB low power mode fast-charge current) is 20% of IPRGM-programmed fast-charge

current in all modes. The charging termination current threshold for all modes is 10% of the IPRGM programmed

fast-charge current. If this pin is grounded, pin-short detection holds the SC824 in logical reset, with charging

disabled.

9BAT

Charger output

10

EN_NTC

Battery NTC thermistor connection pin

VSYS pin output voltage. The safe-to-charge battery temperature range is programmed with a resistor from the

EN_NTC pin to the VSYS pin, and a battery pack NTC thermistor to ground; charging is suspended when the

EN_NTC pin voltage is less than 30%, or greater than 75%, of V

VSYS

. When pulled down below 10% of V

VSYS

, charging

is unconditionally disabled. When the level exceeds 95% of V

VSYS

, the battery is assumed to be disconnected and

the device operates in No-Battery mode.

T

Thermal Pad

Pad is for heatsinking purposes

plane using multiple vias.