7003

HIGH-VOLTAGE,

HIGH-CURRENT

DARLINGTON ARRAY

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

PARTIAL SCHEMATIC

(one of seven drivers)

Dwg. WP-001

ZENER CLAMP

DIODE CLAMP

V

+ V

CC

F

V

+ V

+ V

CC

Z

F

A Zener diode can be used to increase the flyback

voltage. This gives a much faster inductive load turn-

OFF current decay. The maximum Zener voltage plus

the load supply voltage plus the internal diode forward

voltage must not exceed the device’s rated sustaining

voltage.

COM

7.2K

3K

2.7K

Dwg. No. A-9651

93

Ω

50

Ω

50 pF

C

I

Dwg. EP-020

PULSE

GENERATOR

PRR = 10 kHz

DC = 50%

SWITCHING DELAY TEST CIRCUIT

t pd

0

Dwg. WP-010

50%

50%

50%

50%

t pd

Vin

TURN ON

TURN OFF

V out

Dwg. No. WP-010

V

in

= 3.5 V for ULN7003A

Copyright © 1985, 2000 Allegro MicroSystems, Inc.

50

75

100

125

150

2.5

0.5

0

AMBIENT TEMPERATURE IN

°C

2.0

1.5

1.0

25

Dwg. GP-018B

SUFFIX 'A', R

= 60

°C/W

θJA

SUFFIX 'LW', R

= 80

°C/W

θJA