© 2008 Semtech Corporation

SC811 / SC813

10

Pin Descriptions

Pin #

Pin Name

Pin Function

1

VIN

Supply pin

high voltage up to 30V.

2

MODE

Charging mode selection (tri-level logical) input

USB low power mode, ground selects adapter mode.

3STATB

Status output pin

the VIN pin, and a charging cycle begins. It is released when the termination current is reached, indicating that

charging is complete. STATB is not asserted for re-charge cycles.

4

GND

Ground

5

IPUSB

Fast-charge and pre-charge current programming pin for a USB mode charging source

(100%) and low power mode (20%) fast-charge current are programmed by connecting a resistor from this pin to

ground. USB low power mode pre-charge current is equal to the low power mode fast-charge current (20% of USB

high power mode fast-charge current).

6

IPRGM

Adapter mode fast-charge, adapter and USB high power modes pre-charge, and all modes termination current

programming pin

adapter mode fast-charge current when in adapter mode or USB high power mode. The charging termination

current threshold (for adapter or either USB mode selection) is 10% of the IPRGM programmed fast-charge current.

7BAT

Charger output

8

ENB

Combined device enable/disable

float-charging. Float this pin to enable charging without float-charge upon termination. Note that this pin must

be grounded if the SC811/3 is to be operated without a battery connected to BAT.

T

Thermal Pad

Pad is for heatsinking purposes

multiple vias.