ISL9212B

FN6399 Rev 0.00

Page 3 of 11

March 21, 2007

Pin Descriptions

VIN (Pins 1, 2)

The input power source. The VIN can withstand 30V input.

GND (Pin 3)

System ground reference.

WRN (Pin 4)

WRN is an open-drain logic output that turns LOW when any

protection event occurs.

NC (Pins 5, 6, 12)

No connection and must be left floating.

EN (Pin 7)

Enable input. Pull this pin to low or leave it floating to enable

the IC and force it to high, which will disable the IC.

VB (Pin 8)

Battery voltage monitoring input. This pin is connected to the

battery pack positive terminal via an isolation resistor.

ILIM (Pin 9)

Overcurrent protection threshold setting pin. Connect a

resistor between this pin and GND to set the OCP threshold.

OUT (Pins 10, 11)

Output pin.

EPAD

The exposed pad at the bottom of the DFN package for

enhancing thermal performance. Must be electrically

connected to the GND pin.

Typical Applications

Block Diagram

INPUT

ISL6292

BATTERY

CHARGER

BATTERY

PACK

ISL9212B

ILIM

WRN

VIN

GND

VB

OUT

EN

PART

DESCRIPTION

25k



200k

 to 1M

C1

1µF/16V X5R ceramic capacitor

+

FIGURE 1. BLOCK DIAGRAM

POR

PRE-REG

REF

VIN

VB

GND

1.2V

0.8V

R

1

R

2

Q

1

INPUT

CP1

ISL6292

BATTERY

CHARGER

CP2

OUT

R

ILIM

ILIM

FET

DRIVER

EA

R

3

R

4

R

VB

CP3

Q

2

Q

3

BUF

WRN

Q

4

LOGIC

EN

Q

5

R

5

+