ISL9230

4

FN7642.1

July 22, 2011

13

VIN

Power input. The absolute maximum input voltage is 26V. A 4.7µF or larger value capacitor is recommended to be

placed very close to the input pin for decoupling purposes. Additional capacitance may be required to provide a stable

input voltage.

14

TIME

Timing resistor pin. The TIME pin determines the oscillation period by connecting a timing resistor between this pin and

GND. The oscillator also provides a time reference for the charger calculated in Equation 2. Equation 3 provides the

formula for finding the Pre-conditioning time, which is 1/10 of the Fast Charge timer. Leaving the TIME pin unconnected

sets the timer to the default values of 30 minutes for pre-conditioning and 5 hours for fast charge.

15

CONT

Active high overrides the end-of-charge (EOC) or timer termination. By pulling the continuous charge CONT pin high, the

status of this pin can not be changed after POR. The CONT pin is internally pulled down to GND by a 280k

Ω resistor,

but to ensure proper operation, do not leave the CONT pin floating.

16

IREF

Charge current program and monitoring pin. Connect a resistor between this pin and the GND pin to set the charge

current limit determined by Equation 4:

-

EPAD

Exposed pad. Connect as much copper as possible to this pad either on the component layer or other layers through

thermal vias to enhance the thermal performance.

PIN NUMBER

SYMBOL

DESCRIPTION

×

Min

()

=

(EQ. 2)

×

Min

()

=

(EQ. 3)

890

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

mA

()

=

(EQ. 4)

TABLE 1. INPUT CURRENT LIMIT SELECTION

AC/USB

MODE

DESCRIPTION

0

0

USB 100mA limit

0

1

USB 500mA limit

10

11

Suspend mode

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART

MARKING

TEMP RANGE

(°C)

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL9230IRZ

DLBB

-40 to +85

16 Ld 3x3 QFN

L16.3x3E

NOTES:

1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate

plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are

MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

3. For Moisture Sensitivity Level (MSL), please see device information page for ISL9230. For more information on MSL please see techbrief TB363.