ISL97651 데이터 시트보기 (PDF) - Intersil

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ISL97651

4-Channel Integrated LCD Supply

Intersil 

Block Diagram

CM1

FBB

-

+

VREF

VOLTAGE

FEEDBACK

UVLO COMPARATOR

-

+

0.75VREF

1.2MHz

OSCILLATOR

VIN1, VIN2

EN

CDEL

ENL

ISL97651

VREF

REFERENCE

AND

BIAS

SAWTOOTH

GENERATOR

SLOPE

COMPENSATION

℘

CONTROL

LOGIC

BUFFER

THRESHOLDS

AND BIAS

CURRENT

FEEDBACK

LX1

LX2

RSENSE

PGND1

PGND2

SEQUENCE

AND

FAULT CONTROL

CURRENT LIMIT

COMPARATOR

CURRENT LIMIT

THRESHOLD

PGND3

ACGND

DELB

VINL

VSUP

NOUT

NOUT

CONTROL

FBN

-

+

0.2V

UVLO COMPARATOR

-

+

0.4V

0.75 VREF

-

+

FBP

-

+

VREF

VSUP

CB

CURRENT

LIMIT

COMPARATOR

-

+

BUFFER

CURRENT FEEDBACK

CURRENT LIMIT

THRESHOLD

CONTROL

LOGIC

VOLTAGE

FEEDBACK

℘

-

+

SLOPE

VREF

COMPENSATION

SAWTOOTH

GENERATOR

POUT

CONTROL

UVLO

COMPARATOR

-

+

0.75 VREF

LXL

CM2

FBL

VSUP

POUT

C1-

C1+ POUT C2+

C2-

DRN

CTL

FIGURE 11. BLOCK DIAGRAM

COM

9

FN7493.3

April 24, 2009

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