20

LT1786F

© LINEAR TECHNOLOGY CORPORATION 1998

1786f LT/TP 0898 4K • PRINTED IN USA

PART NUMBER

DESCRIPTION

COMMENTS

LT1172

Current Mode Switching Regulator for CCFL or LCD Contrast Control

1.25A, 100kHz

LT1173

Micropower DC/DC Converter for LCD Contrast Control

1A, 24kHz, Hysteretic

LT1182

Dual Current Mode Switching Regulator for CCFL and LCD Contrast Control

1.25A, 0.625A, 200kHz

LT1183

Dual Current Mode Switching Regulator for CCFL and LCD Contrast Control

1.25A, 0.625A, 200kHz

LT1184

Current Mode Switching Regulator for CCFL Control

1.25A, 200kHz

LT1184F

Current Mode Switching Regulator for CCFL Control

1.25A, 200kHz

LT1186F

DAC Programmable Current Mode Switching Regulator for CCFL Control

1.25A, 200kHz, SPI or Pulse Mode

LT1316

Micropower DC/DC Converter for LCD Contrast Control

Programmable Peak Current Limit

LT1372

Current Mode Switching Regulator for CCFL or LCD Contrast Contol

1.5A, 500kHz

RELATED PARTS

90% Efficient Grounded CCFL with 2-Wire SMBus Control of Lamp Current

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

16

15

14

13

12

11

10

9

+

C7

1

µF

C4

2.2

µF

< 6.5V

TO

SMBus

HOST

SHUTDOWN

C1 MUST BE A LOW LOSS CAPACITOR

C1 = WIMA MKI OR MKP-20

PANASONIC ECH-U

L1 = COILTRONICS CTX210605

L2 = COILTRONICS CTX100-4

(DO NOT SUBSTITUTE COMPONENTS

COILTRONICS (561) 241-7876)

Q1, Q2 = ZETEX ZTX849 OR ROHM 25C5001

D1

BAT85

1

2

3

4

5

6

7

8

BAT

8V TO 28V

LAMP

10

6

L1

R1

750

Ω

1%

L2

100

µH

3

2

1

5

4

C1

0.068

µF

C5

1000pF

R2

221k

1%

R3

100k

1%

1786F TA03

C3

2.2

µF

35V

C2

27pF

3kV

+

Q2

Q1

D1

1N5818

DIO

AGND

SHDN

SMBSUS

ADR

BULB

BAT

ROYER

SCL

SDA

CCFL

PGND

LT1786F