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ISL97671A

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

Intersil 

Block Diagram

ISL97671A

VIN = 4.5V TO 26.5V

45V*, 6 x 50mA

VIN

FAULT

LX

EN

VDC REG

OSC AND

RAMP

COMP

FPWM

LED PWM

CONTROL

FAULT/STATUS

REGISTER

S=0

LOGIC

IMAX ILIMIT

ISL97671A

FET

DRIVER

OVP

OVP

PGND

COMP

RSET

AGND

SMBCLK/SCL

SMBDAT/SDA

PWM

GM

AMP

REFERENCE

GENERATOR

+

-

HIGHEST VF

STRING

DETECT

+

-

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

OC, SC

DETECT

CH0

CH5

*VIN > 12V

FAULT/STATUS

REGISTER

TEMP

SENSOR

+

-

FAULT/STATUS

REGISTER

FIGURE 2. ISL97671A BLOCK DIAGRAM

2

FN7709.1

March 24, 2011

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