LTC3706IGN-PBF Просмотр технического описания (PDF) - Linear Technology

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LTC3706IGN-PBF

Secondary-Side Synchronous Forward Controller with PolyPhase Capability

Linear Technology 

LTC3706

BLOCK DIAGRAM

2×

IS+

16

+

32×

IS–

–

15

2V

+

C

–

ITH

7

0.60V

FB

6

SLP

14

FS/SYNC

13

PHASE

5

MODE

4

+

C

–

+

EA

–

gm = 2.8mS

RUN/SS

DRIVE/DMAX

CONTROL

0.25V

+

C

–

2.5V

SLOPE

COMP 1

BLANK

OSC

AND DMAX

PLL

RUN/SS

8

FB

VCCUV

4VSB

SOFT-

START

SHDN

SSLOW

WAIT

UVLO

VSOUT

9

VS+

40k

10

VS–

40k

11

4VSB OC

RESTRT1

OT

40k

+

VSENSE

AMP

–

40k

VCC

SHDN

UVLO

(4.25/4.5)

ITRP

WAIT

OVP

SKIP

BLANK

RESET

DOMINANT

R

Q

S

DMAX

PWM

+

OC

C

3.2V –

OVERCURRENT

VCC

VCC

WAIT

OVP

ZERO

CROSSING

DETECT VCC

DRIVER

ENCODING

AND

VCC

LOGIC

DRIVE

TYPE

FG

2

PGND

23

SG

1

0.2V

SW

20

PT+

22

PGND

PT–

21

VINUV

REG

4VSB

4VSB

RQ

S

OT LATCH

4VSB

VCCUV

VREF

1.24V

60k

+

A

–

VIN

4V VCC

VIN

+

A

–

5VDC TO

30VDC

VIN

19

NDRV

18

SHDN

275k

gm = 5µS

VCC

24

5VDC TO

10VDC

REGSD

17

FB

OVP

PGOOD/OVP

0.6V

PGOOD

3

GND

12

3706 BD

••

PULSE

XFMR

3706fd

8

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