UDQ2540B - Allegro MicroSystems, Inc.

LAST-TIME BUY

— Orders accepted until Oct. 31, 2003

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.

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 25°C, and

with pcb copper foil heat dissipators 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

29317D

UDN2540B (DIP)

ABSOLUTE MAXIMUM RATINGS

at TA = 25°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..................................-20°C to +85°C

Storage Temperature Range,

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

314

ENABLE

GROUND

OUT2

GROUND

OUT3

OUT4

OUT1

VCC

IN1

Dwg. PP-017-2

IN4

IN3

IN2

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 (508) 853-5000

2540

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POWER DRIVER

TRUTH TABLE

ENABLE INNOUTN

HHON

— L OFF

L X OFF

X = Don’t care.

ENABLE

GROUND

OUT2

GROUND

OUT3

OUT4

OUT1

VCC

IN1

IN2

IN4

IN3

CONNECTION

CONNECTION NC

Dwg. PP-017-3

CONNECTION

CONNECTION NC

SUPPLY

A2540SLB (SOIC)

50 75 100 125 150

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

TEMPERATURE IN °°

°°C

Dwg. GP-049-3A

R = 6.0°C/W

θJT

SUFFIX 'B', R = 43°C/W

θJA

SUFFIX 'LB', R = 87°C/W

θJA

RθJA is measured on typical two-sided PCB with

minimal copper ground area. For the SOIC, adding

3.57 in2 copper ground area will reduce the thermal resis-

tance to 52°C/W (2.4 W allowable package power dissipa-

tion at 25°C). See Application Note 29501.5, Improving

Batwing Power Dissipation.

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www.allegromicro.com

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Output Leakage Current ICEX VOUT = 50 V, VIN = 0.8 V, VEN = 2.4 V —<1.0 100 µA

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

Output Sustaining Voltage VCE(sus) IOUT = 1.8 A, L = 3.0 mH 50 ——V

Output Saturation Voltage VCE(SAT) IOUT = 600 mA, VIN = VEN = 2.4 V —0.9 1.0 V

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

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

Input Voltage Logic 1 VIN(1) or VEN(1) 2.4 ——V

Logic 0 VlN(0) or VEN(0) ——0.8 V

Input Current Logic 1 VIN(1) or VEN(1) = 2.4 V ——10 µA

Logic 0 VlN(0) or VEN(0) = 0.8 V ——-100 µA

Total Supply Current ICC VIN* = VEN = 2.4 V, VCC = 5.0 V, —14 20 mA

Outputs Open

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

Clamp Diode Forward Voltage VFIF = 1.0 A —1.3 1.6 V

IF = 1.8 A —1.6 2.0 V

Clamp Diode Leakage Current IRVR = 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.

115 Northeast Cutoff, Box 15036

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

2540

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POWER DRIVER

APPLICATIONS INFORMATION

A typical application is shown for driving four high-current relays,

solenoids, or print heads. A Zener diode is used to increase the

flyback voltage, providing a much faster inductive load turn-off current

decay, resulting in faster dropout (reduced relay contact arcing), and

improved performance. The maximum Zener voltage, plus the load

supply voltage, plus the flyback diode forward voltage must not exceed

the device’s rated sustaining voltage.

With external control circuitry, the ENABLE input can be used for

chopper (PWM) applications. If the ENABLE input is not used, it

should be tied high.

All inputs will float high if open circuited.

Dwg. WP-001

TYPICAL APPLICATION

(QUAD RELAY DRIVER WITH ZENER FLYBACK)

Dwg. EP-016

+5V

ENABLE

IN3

IN 1

+28 V

15V

OUTPUT

VOLTAGE

OUTPUT

CURRENT

ZENER CLAMP

DIODE CLAMP

CE(SAT)

OUT

CEX

V + V

CC F

V + V + V

CC Z F

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NOTES: 1. Leads 1, 8, 9, and 16 may be half leads at vendor’s option.

2. Lead thickness is measured at seating plane or below.

3. Lead spacing tolerance is non-cumulative.

4. Webbed lead frame. Leads indicated are internally one piece.

5. Exact body and lead configuration at vendor’s option within limits shown.

Dimensions in Millimeters

(for reference only)

0.020

0.008

0.300

BSC

Dwg. MA-001-17A in

0.430

MAX

0.280

0.240

0.210

MAX

0.070

0.045

0.015

MIN

0.022

0.014

0.100

BSC

0.005

MIN

0.150

0.115

0.775

0.735

NOTE 4

UDN2540B

Dimensions in Inches

(controlling dimensions)

0.508

0.204

7.62

BSC

Dwg. MA-001-17A mm

10.92

MAX

7.11

6.10

5.33

MAX

1.77

1.15

0.39

MIN

0.558

0.356

2.54

BSC 0.13

MIN

3.81

2.93

19.68

18.67

NOTE 4

115 Northeast Cutoff, Box 15036

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

2540

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POWER DRIVER

NOTES: 1. Webbed lead frame. Leads 5, 6, 15, and 16 are internally one piece.

2. Lead spacing tolerance is non-cumulative.

3. Exact body and lead configuration at vendor’s option within limits shown.

0° TO 8°

0.51

0.33

0.10 MIN.

Dwg. MA-008-21A mm

1.27

BSC

11 0.32

0.23

1.27

0.40

NOTE 1

NOTE 3

7.60

7.40 10.65

10.00

13.00

12.60

2.65

2.35

A2540SLB

Dimensions in Inches

(for reference only)

0°

8°

1 2 3

0.020

0.013

0.0040

MIN.

0.0125

0.0091

0.050

0.016

Dwg. MA-008-21A in

0.050

BSC

20 11

NOTE 1

NOTE 3

0.2992

0.2914 0.419

0.394

0.5118

0.4961

0.0926

0.1043

Dimensions in Millimeters

(controlling dimensions)

2540

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www.allegromicro.com

The products described here are manufactured under one or more

U.S. patents or U.S. patents pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to

time, such departures from the detail specifications as may be required

to permit improvements in the performance, reliability, or

manufacturability of its products. Before placing an order, the user is

cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components

in life-support devices or systems without express written approval.

The information included herein is believed to be accurate and

reliable. However, Allegro MicroSystems, Inc. assumes no responsi-

bility for its use; nor for any infringement of patents or other rights of

third parties which may result from its use.

115 Northeast Cutoff, Box 15036

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

2540

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POWER DRIVER

POWER SINK DRIVERS

IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS

Output Ratings * Features

Serial Latched Diode Internal

mA V # Input Drivers Clamp Outputs Protection Part Number†

75 17 8 X X –

constant current

– 6275

17 16 X X –

constant current

– 6276

100 20 8 – – – saturated – 2595

30 32 X X – – – 5833

40 32 X X – saturated – 5832

50 8 addressable decoder/driver DMOS – 6B259

50 8 – X – DMOS – 6B273

50 8 X X – DMOS – 6B595

120 24 8 X X –

constant current

– 6277

250 50 8 addressable decoder/driver DMOS – 6259

50 8 – X – DMOS – 6273

50 8 X X – DMOS – 6595

50 8 – – X saturated – 2596

60 4 – – X saturated X 2557

350 50 4 – X X – – 5800

50 7 – – X – – 2003

50 7 – – X – – 2004

50 8 – – X – – 2803

50 8 – X X – – 5801

50 8 X X – – – 5821

50 8 X X X – – 5841

50 8 addressable decoder/driver DMOS – 6A259

50 8 X X – DMOS – 6A595

80 8 X X – – – 5822

80 8 X X X – – 5842

95 7 – – X – – 2023

95 7 – – X – – 2024

450 30 28 dual 4- to 14-line decoder/driver – – 6817

600 60 4 – – – saturated X 2547

60 4 – – X saturated X 2549 and 2559

700 60 4 – – X saturated X 2543

750 50 8 – – X saturated – 2597

1000 46 4 stepper motor controller/driver MOS – 7024 and 7029

1200 46 4 microstepping controller/driver MOS – 7042

1250 50 4 stepper motor translator/driver – X 5804

1800 50 4 – – X – – 2540

3000 46 4 stepper motor controller/driver MOS – 7026

46 4 microstepping controller/driver MOS – 7044

* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or

over-current protection voltage limits.

† Complete part number includes additional characters to indicate operating temperature range and package style.