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ISL97674

6-Channel LED Driver with Phase Shift Control and Frame Rate to Dimming Frequency Synchronization

Intersil 

ISL97674

Ordering Information

PART NUMBER PART

(Notes 1, 2, 3) 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.

Pin Configuration

ISL97674

(20 LD QFN)

TOP VIEW

20 19 18 17

FAULT 1

16 OVP

VIN 2

15 CH5

EN/PWM 3

14 CH4

VDC 4

13 CH3

VSYNC 5

12 CH2

SDA 6

11 CH1

7 8 9 10

Pin Descriptions (I = Input, O = Output, S = Supply)

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 SMBus/I2C serial data input and output

SCL

7

I SMBus/I2C serial clock input

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

3

FN7634.0

June 25, 2010

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