ISL97678IRZ-TK 데이터 시트보기 (PDF) - Intersil

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ISL97678IRZ-TK

8-Channel 45V 50mA LED Driver

Intersil 

ISL97678

Block Diagram

VIN* = 4.75V~26V

VDC

VLOGIC

fSW

VIN

REG1

REG2

OSC &

RAMP

Comp

Analog Bias

Logic Bias

fsw

COMP

GM

AMP

RSET

AGND

+ REF

-

GEN

REF_OVP

REF_ VS C

45V*, 50mA per string

96 (8x12) LEDs

10uH/3A

EN

LX 2x4.7uF/50V

O/P Short

Fault

Boost SW

OVP

OVP

Σ=0

Imax ILIMIT

FET

Logic Drivers

VSET

Fault Control

Highest VF

String Detect

+

-

pe

Open Ckt, Short Ckt

Detects

1

Temp

Sensor

PGND

CH1

CH2

CH8

Fault

Con trol

+

2

-

PWM

fPWM

PWM

Dimmi ng

Controller

* Vin >=12V for 45V/50mA apps

+

8

-

ISL97678

FIGURE 2. ISL97678 BLOCK DIAGRAM

Ordering Information

PART NUMBER

PART MARKING

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL97678IRZ (Notes 1, 2)

ISL9767 8IRZ

32 Ld 5x5 QFN

L32.5x5B

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 ISL97678. For more information on MSL please

see techbrief TB363.

3

FN6998.1

November 5, 2009

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