16

LT1684

1684f LT/TP 0300 4K • PRINTED IN USA

©LINEAR TECHNOLOGY CORPORATION 1999

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

TYPICAL APPLICATIO

5V Input Nonisolated 5 REN Ring Generator

IN B

C1

100pF

C2

100pF

PWM

INPUT

+

5V

–

R4

10k

LT1684

COMP1

COMP2

IN A

AMPIN

OUT

C3 100pF

C4 20pF

R2

10k

R3

5k

FB1

C8

1

µF

C13 0.1

µF

R1

2k

C5

4700pF

C7

6.8nF

160V

C6

6.8nF

160V

R6

3k

D1

1N4001

DS2

D1N5817

DS1

MBRS1100

DZ1

60V

MMSZ5264BT1

–100V

100V

R5

300k

R10

100k

M2

IRF9610

R7

100

Ω

R9

100k

R8

100

Ω

M1

IRF610

C11

0.47

µF

160V

C10

0.47

µF

160V

T1

COILTRONICS

CTX 14468-X1

12

10

9

7

4, 5

1, 2

+

+

C12

220

µF

35V

+

D2

MURS160T3

D3

MURS160T3

FB

SW

LT1271

U1

GND

4

1

5

2

3

+IN B

OUT A

LT1211

1

4

8

OUT B

–IN A

27

–IN B

+IN A

36

5

C9

0.1

µF

R11

470

Ω

R12

5k

D4

D1N4148

D5

D1N4148

R15

12k

R16

1M

R13

12k

R14

1M

RING TONE

OUT

1684 TA02

•

•

•

FB1: FERRONICS FMB1601

(716) 388-1020

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT1082

1A High Voltage Switching Regulator

LT1166

Power Output Stage Automatic Bias System

Sets Class AB Bias Currents, Eliminates Adjustments

and Thermal Runaway

LTC1177-5/LTC1177-12

Isolated MOSFET Drivers

LT1270

8A Power Switching Regulator

LT1271

4A Power Switching Regulator

LT1339

High Power Synchronous DC/DC Controller

Operation Up to 60V, Output Current Up to 50A

LT1676

Wide Input Range, High Efficiency, Step-Down Switching Regulator

Operation Up to 60V, 100kHz, Up to 500mA Output