ISL97650 데이터 시트보기 (PDF) - Intersil

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ISL97650

4-Channel Integrated LCD Supply

Intersil 

Block Diagram

ISL97650

VREF

CM1

FBB

GM AMPLIFIER

-

+

VREF

UVLO COMPARATOR

-

+

VDC1

0.75 VREF

1.2MHz

OSCILLATOR

SAWTOOTH

GENERATOR

SLOPE

COMPENSATION

∑

CONTROL

LOGIC

BUFFER

CURRENT

AMPLIFIER

LX1

LX2

RSENSE

PGND1

PGND2

VIN1, VIN2

EN

CDEL

ENL

DELB

REGULATOR

REFERENCE BIAS

AND

SEQUENCE CONTROLLER

CURRENT LIMIT

COMPARATOR

CURRENT LIMIT

THRESHOLD

VIN2

VSUP

NOUT

FBN

-

+

0.2V

UVLO COMPARATOR

-

+

0.4V

0.75 VREF

-

+

FBP

-

+

VREF

REGULATOR

VDC2

CB

CURRENT

LIMIT

COMPARATOR

BUFFER

CURRENT AMPLIFIER

-

+

CURRENT LIMIT

THRESHOLD

CONTROL

LOGIC

GM AMPLIFIER

-

∑

+

SLOPE

VREF

COMPENSATION

SAWTOOTH

GENERATOR

UVLO

COMPARATOR

-

+

0.75 VREF

SUP

LXL

CM2

FBL

POUT

SUP

C1-

C1+ POUT

C2+ C2-

DRIV

CTL

COM

9

FN9198.4

April 17, 2009

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