ISL9230

FN7642 Rev 2.00

Page 3 of 20

September 22, 2011

Pin Configuration

ISL9230

(16 LD QFN)

TOP VIEW

1

2

3

5

6

11

10

8

7

12 ILIM

NTC

VOUT

9

4

VOUT

CHG

13

14

15

16

VBAT

VBAT

CHGEN

Pin Descriptions

PIN NUMBER

SYMBOL

DESCRIPTION

1

NTC

The NTC pin sources a current to develop a voltage across the battery pack NTC resistor. Placing a 10k

NTC thermistor

will check if the battery’s temperature is out of the safe temperature window. If the temperature is out of the safe

operating window, the charger is suspended. For applications that do not require the use of the NTC function, connect

a 10k

fixed resistor from NTC to GND to maintain a valid voltage level on the NTC pin.

2, 3

VBAT

Charger output pin. Connect this pin to the battery. A 1µF or larger X5R ceramic capacitor is recommended for

decoupling and stability purposes.

4CHGEN

Battery charger enable pin. The CHGEN pin is a logic input pin to provide external charge control. An internal 670k



pull-down resistor is connected to this pin. Drive the pin HIGH to disable the charger during charging. When CHGEN is

high, VOUT is still active and the battery power remains available at VOUT. To ensure proper operation, do not leave this

pin unconnected.

5

AC/USB

Selects between Adapter and USB input power. Pull high for selecting adapter power and pull low for USB power. An

internal 670k

 pull-down resistor is connected to this pin. To ensure proper operation, do not leave this pin

unconnected.

6

MODE

In combination with the AC/USB pin, this pin selects the input current limit levels. If AC/USB pin is low, a low on the

Mode pin sets the USB current to 100mA, and a high selects the 500mA limit. If the AC/USB pin is high, a low on the

mode pin selects the ILIM programmed current and a high will put the ISL9230 into a suspend state. An internal

280k

 pull-down resistor is connected to this pin. To ensure proper operation, do not leave this pin unconnected.

7PG

Open-drain power good indication. The open-drain MOSFET turns on when the input voltage is above the POR threshold

but below the OVP threshold. This pin is capable of sinking 5mA (minimum) to drive a LED. The maximum voltage rating

for this pin is 6.5V and it is recommended to use VOUT as the pull-up voltage.

8

GND

Connect to ground.

9CHG

Open-drain charge indication pin. This pin outputs a logic LOW when a charge cycle starts and goes Hi-Z when an

end-of-charge (EOC) condition is qualified. This pin is capable of sinking 5mA min. to drive an LED. When the charger

is disabled, the CHG is also in a Hi-Z state.

10, 11

VOUT

Output connection to the system. When a valid input power is present, this pin provides a 3.4V regulated voltage for the

system during trickle charge and is maintained at VBAT + 225mV during fast charging. A 4.7µF or larger X5R ceramic

capacitor is recommended for decoupling and stability purposes.

12

ILIM

Input current limit programming pin. Connect a resistor between this pin and the GND to set the input current limit

determined by Equation 1 when AC/USB = 1, MODE = 0

If the ILIM pin is left unconnected, all input current is disabled.

1610

--------------

mA



200mA ILIM 1.5A





=

(EQ. 1)