ISL97674

3

FN7634.0

June 25, 2010

Pin Configuration

ISL97674

(20 LD QFN)

TOP VIEW

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART

MARKING

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL97674IRZ

7674

20 Ld 4x3 QFN L20.3x4

NOTES:

1. Add “-T” or “-TK” 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 ISL97674. For more information on

MSL please see techbrief TB363.

FAULT

VIN

EN/PWM

VDC

VSYNC

SDA

OVP

CH5

CH4

CH3

CH2

CH1

1

2

3

4

5

6

16

15

14

13

12

11

20

19 18 17

78

9

10

PIN NAME PIN NO. TYPE

DESCRIPTION

FAULT

1

O

Fault disconnect switch

VIN

2

S

Input voltage for the device and LED power

EN/PWM

3

I

Dual Functions: Enable pin and PWM brightness control pin. The device needs 4ms for initial

power-up Enable, then this pin can be applied with a PWM signal with off time no longer than

28ms.

VDC

4

S

De-couple capacitor for internally generated supply rail.

VSYNC

5

I

Frame Rate to Dimming Frequency Synchronization Input

SDA

6

I/O

SCL

7

I

PLLC

8

I

RC Components Setting Pin for Internal Phase Lock Loop

AGND

9

S

Analog Ground for precision circuits

CH0

10

I

Input 0 to current source, FB, and monitoring

CH1

11

I

Input 1 to current source, FB, and monitoring

CH2

12

I

Input 2 to current source, FB, and monitoring

CH3

13

I

Input 3 to current source, FB, and monitoring

CH4

14

I

Input 4 to current source, FB, and monitoring

CH5

15

I

Input 5 to current source, FB, and monitoring

OVP

16

I

Overvoltage protection input

RSET

17

I

Resistor connection for setting LED current, (see Equation 1 for calculating the ILEDpeak)

COMP

18

O

Boost compensation pin

PGND

19

S

Power ground

LX

20

O

Input to boost switch