IR3521 datasheet(2/45 Pages) IRF

2 / 45 page

IR3521

Page 2

V3.03

APPLICATION CIRCUIT

Power Saving

Indicator to

VDD Phase ICs

PSI_L

CSS/DEL1

CVDAC1

RVCCLFB2

CSS/DEL2

ROSC

RVCCLDRV

RTHERMISTOR1

RFB13

PWROK

ENABLE

IIN2

OCSET2

VDRP1

IIN1

EAOUT1

VDAC1

VDAC2

ROSC

PSI_L

SVD

SS/DEL1

OCSET1

SS/DEL2

EAOUT2

EPAD

IR3521

CONTROL

VDDNB SENSE -

VDDNB SENSE +

ROCSET1

RVCCLFB1

RVDAC1

CVCCL9

To VDDNB

Remote

Sense

SVC

PHSIN

12V

PGOOD

PHSOUT

VDD SENSE -

VDD SENSE +

SVD

ROCSET2

CLKOUT

VDAC1

ISHARE1

EAOUT1

CCP22

CCP21

RCP2

ENABLE

12V

CFB2

RFB21

RFB22

3 Wire Analog

Control Bus to

VDDNB Phase

ICs

To Converters

To VDD

Remote

Sense

2 wire

Digital

Daisy Chain

Bus to VDD

& VDDNB

Phase ICs

To Phase IC

VCCL & GATE

DRIVE BIAS

VCCL

Phase Clock Input to

Last Phase IC of VDD

PWROK

ISHARE2

RVDAC2

CVDAC2

VDAC2

CCP11

RCP1

CDRP1

RFB11

RDRP1

CFB1

CCP12

RFB12

EAOUT2

Load Line

NTC

Thermistor;

Locate close to

VDD Power Stage

3 Wire Analog

Control Bus

to VDD Phase

ICs

Figure 1 – IR3521 Application Circuit

IR3521 数据表(PDF) 2 Page - International Rectifier

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