ISL97671IRZ View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

ISL97671IRZ

6-Channel SMBus/I2C or PWM Dimming LED Driver with Phase Shift Control

Intersil 

VIN = 4.5~26.5V

ISL97671

VOUT = 45V*, 40mA PER STRING

ISL97671

1 FAULT

2 VIN

4 VDC

LX 20

OVP 16

PGND 19

7 SMBCLK/SCL

6 SMBDAT/SDACH0 10

5 PWM

3 EN

CH1 11

CH2 12

CH3 13

17 RSET

CH4 14

8 FPWM

CH5 15

9 AGND

COMP 18

*VIN > 12V

FIGURE 2. ISL97671 TYPICAL APPLICATION DIAGRAM WITH EXTERNAL PWM SIGNAL CONTROL

Block Diagram

VIN = 4.5V TO 26.5V

45V*, 40mA PER STRING

(6 x 13 = 78 EDs)

VIN

EN

VDC

REG

OSC AND

RAMP

COMP

fPWM

LED PWM

CONTROL

FAULT

FAULT/STATUS

REGISTER

Σ=0

LOGIC

IMAX ILIMIT

ISL97671

FET

DRIVER

LX

OVP

PGND

COMP

RSET

AGND

GM

AMP

REFERENCE

GENERATOR

+

-

HIGHEST VF

STRING

DETECT

+

-

SMBCLK/SCL

SMBDAT/SDA

PWM

SMBUS/I2C

INTERFACE

AND PWM

CONTROl

LOGIC

REGISTERS

PWM BRIGHTNESS CONTROL

DEVICE CONTROL

FAULT/STATUS

IDENTIFICATION

DC BRIGHTNESS CONTROL

CONFIGURATION

PWM/OC/SC

DC

OC, SC

DETECT

CH0

CH5

OC, SC

DETECT

*VIN > 12V

FAULT/STATUS

REGISTER

TEMP

SENSOR

+

-

FAULT/STATUS

REGISTER

FIGURE 3. ISL97671 BLOCK DIAGRAM

2

FN7631.0

June 24, 2010

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