2540 Datasheet, PDF(1/8 Page) Allegro MicroSystems

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2540 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – QUAD DARLINGTON POWER DRIVER

2540

OUT4 1

OUT3 3

GROUND 4

GROUND 5

OUT2 6

OUT1 8

UDN2540B

16 IN4

15 IN3

14 ENABLE

13 GROUND

12 GROUND

11 V CC

10 IN 2

9 IN 1

Dwg. PP-017-2

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 high-

current 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 surface-

mount applications. The batwing construction provides for maximum

package power dissipation in a standard construction. At 25Â°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.

ABSOLUTE MAXIMUM RATINGS

at TA = 25Â°C

Output Voltage, VOUT ........................... 50 V

Output Current, IOUT (peak) ................ 2.5 A

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

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

Input Voltage, VIN ................................ 7.0 V

Package Power Dissipation,

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

Operating Temperature Range,

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

Storage Temperature Range,

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

FEATURES

I 1.8 A Continuous Output Current

I Output Voltage to 50 V

I TTL and 5 V CMOS Compatible Inputs

I Efficient Input/Output Pinning

I Integral Transient-Suppression Diodes

I Replaces L6221A and L6221CD

Always order by complete part number:

Part Number Package

UDN2540B

16-pin batwing DIP

A2540SLB

20-lead batwing SOIC

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