Datasheet UDN2879W-2, UDN2879W, UDN2878W Datasheet (Allegro)

2878

AND

2879

QUAD HIGH-CURRENT

DARLINGTON SWITCHES

These quad Darlington arrays are designed to serve as interface
between low-level logic and peripheral power devices such as sole­noids, motors, incandescent displays, heaters, and similar loads of up to
320 W per channel. Both integrated circuits include transient-suppres­sion diodes that enable use with inductive loads. The input logic is
compatible with most TTL, DTL, LSTTL, and 5 V CMOS logic.

Type UDN2878W and UDN2879W 4 A arrays are identical except
for output-voltage ratings. The former is rated for operation to 50 V
(35 V sustaining), while the latter has a minimum output breakdown
rating of 80 V (50 V sustaining). The lower-cost UDN2879W-2 is
recommended for applications requiring load currents of 3 A or less.
These less expensive devices are identical to the basic parts except for
the maximum allowable load-current rating.

29305.10B†

Data Sheet

Dwg. No. A-11,974

ABSOLUTE MAXIMUM RATINGS

at +25°C Free-Air Temperature

for any driver

(unless otherwise noted)

Output Voltage, V

(UDN2878W) . . . . . . . . . . . . . . . . 50 V

(UDN2879W & UDN2879W-2) . . 80 V

Output Current, l

(UDN2878W & UDN2879W) . . . 5.0 A

(UDN2879W-2) . . . . . . . . . . . . . 4.0 A

Input Voltage, V

Input Current, IIN. . . . . . . . . . . . . . . 25 mA

Supply Voltage, V
Total Package Power Dissipation,

. . . . . . . . . . . . . . . . . . . . See Graph

P

D

Operating Ambient Temperature Range,

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

Storage Temperature Range,

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

CEX

C

. . . . . . . . . . . . . . . . 15 V

IN

. . . . . . . . . . . . . . . 10 V

S

For maximum power-handling capability, all drivers are supplied
in a 12-pin single in-line power-tab package. The tab needs no insula­tion. External heat sinks are usually required for proper operation of
these devices.

FEATURES

■ Output Currents to 4 A

■ Output Voltages to 80 V

■ Loads to 1280 W

■ TTL, DTL, or CMOS Compatible Inputs

■ Internal Clamp Diodes

■ Plastic Single In-Line Package

■ Heat-Sink Tab

Always order by complete part number:

Part Number Max. ICMax. V

UDN2878W 5.0 A 50 V 35 V

UDN2879W 5.0 A 80 V 50 V

UDN2879W-2 4.0 A 80 V 50 V

CEX

Min. V

CE (sus)

2878

AND

2879

QUAD HIGH-CURRENT
DARLINGTON SWITCHES

10

R = 2.0°C/W

θJT

8

6

12°C/W HEAT SINK

4

2

FREE AIR, R = 38°C/W

0

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

25

50 75 100 125 150

TEMPERATURE IN °C

3.0°C/W HEAT SINK

R = 14°C/W

θJA

θJA

R = 5.0°C/W

θJA

PARTIAL SCHEMATIC

One of 4 Drivers

Dwg. GP-012B

NOTE: Pin 3 must be connected to ground for proper operation.

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

Copyright © 1983, 2000 Allegro MicroSystems, Inc.

Dwg. No. A-12,037

2878

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QUAD HIGH-CURRENT

DARLINGTON SWITCHES

ELECTRICAL CHARACTERISTICS at VS = 5.0 V, TA = +25°C (unless otherwise noted).

2879

Test Applicable

Limits

Characteristic Symbol Fig. Devices Test Conditions Min. Max. Units

Output Leakage Current I

CEX

1 UDN2878W VCE = 50 V — 100 µA

V

= 50 V, TA = +70°C — 500 µA

CE

UDN2879W/W-2 V

= 80 V — 100 µA

CE

VCE = 80 V, TA = +70°C — 500 µA

Output Sustaining V
Voltage

CE(sus)

— UDN2878W lC = 4 A, L = 10 mH 35 — V

UDN2879W l

= 4 A, L = 10 mH 50 — V

C

UDN2879W-2 lC = 3 A, L = 10 mH 50 — V

Collector-Emitter V
Saturation Voltage

CE(SAT)

2All l

= 500 mA, VIN = 2.75 V — 1.1 V

C

l

= 1.0 A, VIN = 2.75 V — 1.3 V

C

lC = 2.0 A, VIN = 2.75 V — 1.5 V

l

= 3.0 A, VIN = 2.75 V — 1.9 V

C

Input Current I

Input Voltage V

IN

IN(ON)

UDN2878/79W l

3All V

4All V

= 4.0 A, VIN = 3.0 V — 2.4 V

C

= 2.75 V — 550 µA

IN

V

= 3.75 V — 1000 µA

IN

= 2.2 V, lC = 3.0 A — 2.75 V

CE

UDN2878/79W VCE = 2.2 V, lC = 4.0 A — 2.75 V

Supply Current per Driver I

Turn-On Delay t

Turn-Off Delay t

Clamp Diode I

S

PLH

PHL

R

7All l

— All 0.5 Ein to 0.5 E

— All 0.5 Ein to 0.5 E

5All V

Leakage Current

UDN2879W/W-2 VR = 80 V — 50 µA

Clamp Diode V
Forward Voltage

F

6All I

UDN2878/79W IF = 4.0 A — 3.0 V

Caution: High-current tests are pulse tests or require heat sinking.

= 500 mA, VIN = 2.75 V — 6.0 mA

C

out

, lC = 3.0 A — 1.5 µs

out

= 50 V — 50 µA

R

V

= 50 V, TA = +70°C — 100 µA

R

V

= 80 V, TA = +70°C — 100 µA

R

= 3.0 A — 2.5 V

F

— 1.0 µs

www.allegromicro.com

2878

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2879

QUAD HIGH-CURRENT
DARLINGTON SWITCHES

TEST FIGURES

V

OPEN

IN

FIGURE 1

V

OPENVCE

µA

OPEN

V

V

CE

Dwg. No. A-9734A

OPEN

I

CEX

V

IN

V

V

CE

I

C

Dwg. No. A-10,350

FIGURE 2

V

R

I

IN

mA

V

IN

FIGURE 3

µA

I

R

OPEN

I

C

Dwg. No. A-9735A

OPEN

OPEN

Dwg. No. A-9732Dwg. No. A-9729A

Dwg. No. A-9736

OPEN

I

V

V

F

F

FIGURE 4

FIGURE 5 FIGURE 6

V

OPEN

S

I

S

mA

V

IN

I

C

Dwg. No. A-10,351

FIGURE 7

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

2878

QUAD HIGH-CURRENT

DARLINGTON SWITCHES

TYPICAL APPLICATIONS

INPUT WAVEFORMS STEPPER-MOTOR DRIVER

DIGIT DRIVER

FOR MULTIPLEXED INCANDESCENT LAMP DISPLAY

AND

Dwg. No. A-11,795

2879

Dwg. No. A-11,975

PRINT-HAMMER DRIVER

www.allegromicro.com

Dwg. No. A-11,976

Dwg. No. B-1512

2878

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DARLINGTON SWITCHES

Dimensions in Inches

(controlling dimensions)

INDEX

AREA

0.065

0.035

0.020

1.260

1.240

0.775

0.765

0.245

0.225

0.180

0.155

MAX

0.055

0.045

ø

0.145

0.140

0.135

0.570

0.365

1

0.030

0.020

12

0.100

±0.010

0.540

0.290

0.023

0.018

MIN

0.100

0.080

0.070

NOTES: 1. Lead thickness is measured at seating plane or below.

2. Lead spacing tolerance is non-cumulative.

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

4. Lead gauge plane is 0.030” below seating plane.

5. Supplied in standard sticks/tubes of 15 devices.

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

Dwg. MP-007 in

Dimensions in Millimeters

(for reference only)

2878

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2879

QUAD HIGH-CURRENT

DARLINGTON SWITCHES

INDEX

AREA

1.65

0.89

0.51

1

32.00

31.49

19.69

19.45

0.76

0.51

12

6.22

5.71

3.56

9.27

2.54

±0.254

3.94

3.68

4.57

MAX

ø

14.48

13.71

7.36

MIN

0.59

0.45

1.40

1.14

3.43

2.54

2.03

1.77

NOTES: 1. Lead thickness is measured at seating plane or below.

2. Lead spacing tolerance is non-cumulative.

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

4. Lead gauge plane is 0.762 mm below seating plane.

5. Supplied in standard sticks/tubes of 15 devices.

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 responsi­bility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.

www.allegromicro.com

Dwg. MP-007 mm

2878

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2879

QUAD HIGH-CURRENT
DARLINGTON SWITCHES

POWER SINK DRIVERS

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

Output Ratings *

Serial Latched Diode Internal

mA V # Input Drivers Clamp Outputs Protection Part Number

75 17 8 X X –

17 16 X X –

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

250 50 8 addressable decoder/driver DMOS – 6259

50 8 – X – DMOS – 6273
50 8 X X – DMOS – 6595

135 7 – – X – – 7003

300 45 1 – Hall sensor/driver X – X 5140

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 – – 2804
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
95 8 – – X – – 2823

95 8 – – X – – 2824
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
900 14 2 – Hall sensor/driver X saturated X 3625

26 2 – Hall sensor/driver X saturated X 3626

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

50 4 – – X – – 2064 and 2068

1500 80 4 – – X – – 2065 and 2069
1800 50 4 – – X – – 2544

50 4 – – X – – 2540

3000 46 4 stepper motor controller/driver MOS – 7026

46 4 microstepping controller/driver MOS – 7044

4000 50 4 – – X – – 2878

80 4 – – X – – 2879

* 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.

Features

constant current
constant current

– 6275
– 6276

†

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