SC1404(2003) Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC1404
(Rev.:2003)

Mobile Multi-Output PWM Controller with Virtual Current Sense™

Semtech Corporation 

SC1404

POWER MANAGEMENT

Block Diagram

V+

+3.3V

V+

SYNC PSAVE

VDD

12OUT

200m A

+

4.7µ f

VL

VL

BST3

VIN

DH3

LX3

DL3

5V

REG

EN

DELAY

CSL5

VL

LS

OSC

50mV

7.5m V

OC

3V

CTL

PS LOGIC

12 V

REG

VL

VIN

BST5

+

2.2µ f

HS

DH5

LX5

T1

+5V

VL

LS

DL5

1:3

OC

5V

CTL

LOGIC PS

50mV

PGND

7.5m V

2.5m V

PPSOL

PPOS L

2.5m V

CSH3

CSL3

COMP3

PWM

MODULATOR

OV FAULT

+10%

-25%

UV FAULT

PWM

MODULATOR

CSH5

CSL5

COMP5

REF

TIME/ON5

2.5V

REF

V+

CSL3

CSL5

CURRENT

RAMP

3

VL

2

POW ER-ON

SEQUENCE

LOGIC

DELAY

TIMER

BV

SS

2.0

0.5

RESET

SEQ

RUN/ON3

 2003 Semtech Corp.

7

www.semtech.com

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