Allegro UDN2540B Datasheet

QUAD DARLINGTON

POWER DRIVER

Combining AND logic gates and inverting high-current bipolar
outputs, the UDN2540B and A2540SLB quad Darlington power drivers
provide interface between low-level signal-processing circuits and
power loads totaling 360 W. Each of the four independent outputs can
sink up to 1.8 A in the on state with peak inrush currents to 2.5 A. The
four power outputs are each comprised of an open-collector Darlington
driver and an internal flyback/clamp diode for switching inductive
leads. They feature a minimum breakdown and sustaining voltage of
50 V. The logic inputs are compatible with TTL and 5 V CMOS logic
systems.

Typical applications include print heads, relays, solenoids, and
dc stepping motors. These drivers can also be used to drive high­current incandescent lamps, LEDS, and heaters. A similar device,
specifically intended for driving a unipolar stepper motor in the
two-phase drive format, is the UDN2544B.

The UDN2540B is supplied in a 16-pin batwing power DIP; the
A2540SLB is supplied in a 20-lead batwing power SOIC for surface­mount applications. The batwing construction provides for maximum
package power dissipation in a standard construction. At 25°C, and
with only 1 sq. in. of copper foil at the ground tabs, either package is
capable of safely dissipating more than 2 W.

FEATURES

■ 1.8 A Continuous Output Current

■ Output Voltage to 50 V

■ TTL and 5 V CMOS Compatible Inputs

■ Efficient Input/Output Pinning

■ Integral Transient-Suppression Diodes

■ Replaces L6221A and L6221CD

Data Sheet

29317C

UDN2540B

ABSOLUTE MAXIMUM RATINGS

at TA = 25°C

Output Voltage, V

OUT

........................... 50 V

Output Current, I

OUT

(peak) ................ 2.5 A

(continuous) .................................. 1.8 A

Logic Supply Voltage, VCC.................. 7.0 V

Input Voltage, V

IN

................................ 7.0 V

Package Power Dissipation,

PD........................................ See Graph

Operating Temperature Range,

TA.................................. -20°C to +85°C

Storage Temperature Range,

T

S

................................ -55°C to +150°C

1

2

3

14

4

5

6

7

8

9

10

11

12

13

15

16

ENABLE

GROUND

GROUND

OUT

2

K

GROUND

GROUND

OUT

3

OUT

4

K

OUT

1

V

CC

IN

1

Dwg. PP-017-2

IN

4

IN

3

IN

2

Always order by complete part number:

Part Number Package

UDN2540B 16-pin batwing DIP

A2540SLB 20-lead batwing SOIC

2540

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

2540

QUAD DARLINGTON
POWER DRIVER

TRUTH TABLE

ENABLE IN

N

OUT

N

HHON

— L OFF

L X OFF

X = Don’t care.

ENABLE

GROUND

GROUND

OUT

2

K

GROUND

GROUND

OUT

3

OUT

4

K

OUT

1

V

CC

IN

1

IN

2

IN

4

IN

3

13

14

17

19

12

18

20

11

NO
CONNECTION

NO

CONNECTION

NC

NC

1

2

3

9

4

7

10

5

6

8

Dwg. PP-017-3

NO
CONNECTION

NO

CONNECTION

NC

NC

SUPPLY

16

15

A2540SLB

50 75 100 125 150

5

1

0

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

TEMPERATURE IN °C

4

3

2

25

Dwg. GP-049-3

R = 6.0°C/W

θJT

SUFFIX 'B', R = 43°C/W

θJA

SUFFIX 'LB', R = 60°C/W

θJA

Copyright © 1986, 1996 Allegro MicroSystems, Inc.

2540

QUAD DARLINGTON

POWER DRIVER

www.allegromicro.com

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Output Leakage Current I

CEX

V

OUT

= 50 V, VIN = 0.8 V, VEN = 2.4 V — <1.0 100 µA

V

OUT

= 50 V, VIN = 2.4 V, VEN = 0.8 V — <1.0 100 µA

Output Sustaining Voltage V

CE(sus)

I

OUT

= 1.8 A, L = 3.0 mH 50 —— V

Output Saturation Voltage V

CE(SAT)

I

OUT

= 600 mA, VIN = VEN = 2.4 V — 0.9 1.0 V

I

OUT

= 1.0 A, VIN = VEN = 2.4 V — 1.0 1.2 V

I

OUT

= 1.8 A, VIN = VEN = 2.4 V — 1.3 1.6 V

Input Voltage Logic 1 V

IN(1)

or V

EN(1)

2.4 —— V

Logic 0 V

lN(0)

or V

EN(0)

——0.8 V

Input Current Logic 1 V

IN(1)

or V

EN(1)

= 2.4 V ——10 µA

Logic 0 V

lN(0)

or V

EN(0)

= 0.8 V ——-100 µA

Total Supply Current I

CC

VIN* = VEN = 2.4 V, VCC = 5.0 V, — 14 20 mA

Outputs Open

V

IN

* = VEN = 0.8 V, VCC = 5.0 V — 0.4 2.0 mA

Clamp Diode Forward Voltage V

F

IF = 1.0 A — 1.3 1.6 V

I

F

= 1.8 A — 1.6 2.0 V

Clamp Diode Leakage Current I

R

VR = 50 V — <1.0 100 µA

Typical Data is for design information only.
Negative current is defined as coming out of (sourcing) the specified terminal.
As used here, -100 is defined as greater than +10 (absolute magnitude convention) and the minimum is implicitly zero.
*All inputs simultaneously, all other tests are performed with each input tested separately.

ELECTRICAL CHARACTERISTICS at TA = 25°C, TJ ≤ 150°C, VCC = 4.75 V to 5.25 V.