LT1786F Просмотр технического описания (PDF) - Linear Technology

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LT1786F

SMBus Programmable CCFL Switching Regulator

Linear Technology 

LT1786F

BLOCK DIAGRAM

LT1786F SMBus Programmable CCFL Switching Regulator

SHDN 6

SCL 10

SDA 9

VCC

BAT ROYER

12

14

13

SHUTDOWN

2.4V

REGULATOR

UNDER-

VOLTAGE

LOCKOUT

THERMAL

SHUTDOWN

200kHz

OSC

+

CCFL

–

V1

0.465V

Q5

1×

Q3

2×

Q4 Q7

5× 9×

R4

0.1Ω

LOGIC

–+

D2

6V

gm

R3

1k

Q6

2×

Q11

COMP

Q8

1×

Q9

Q10

3×

2×

D1

CCFL

VSW

16

DRIVE

Q1

ANTI-

SAT

+

CURRENT

AMP

–

GAIN = 4.4

R1

0.125Ω

2

ICCFL

5

3

AGND

DIO

15

BULB

4

CCFL

VC

1

CCFL

PGND

SMBus

INTERFACE

8

ADR

SD

POWER-ON

RESET

SMBSUS

7

1

REGISTER A

1

3-BIT LATCH

EN1

6

SHUTDOWN

REGISTER B

1-BIT LATCH

EN2

SD

REGISTER C

6

6-BIT LATCH

EN2

SD

VOLTAGE

REFERENCE

SD

6-BIT

CURRENT

DAC

RADJ

11 IOUT

1786 BD

10

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