UDN2544B Allegro MicroSystems, Inc., UDN2544B Datasheet

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UDN2544B

Manufacturer Part Number
UDN2544B
Description
Quad Darlington Power Driver
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
GROUND
GROUND
Output Voltage, V
Output Current, I
Logic Supply Voltage, V
Input Voltage, V
Package Power Dissipation,
Operating Temperature Range,
Storage Temperature Range,
OUT
OUT
OUT
OUT
(Peak) ........................................... 2.5 A
(Continuous) ................................. 1.8 A
P
T
T
K
K
4
3
2
A
S
1
D
......................................... See Graph
.................................. -20 C to +85 C
................................ -55 C to +150 C
1
2
3
4
5
6
7
8
IN
OUT
OUT
.................................. 7.0 V
............................. 50 V
CC
.................... 7.0 V
16
15
14
13
12
11
10
9
Dwg. PP-017A
ENABLE
V
IN
IN
GROUND
GROUND
IN
IN
CC
3
4
2
1
2544
Always order by complete part number: UDN2544B .
UDN2544B quad Darlington power driver provides an interface be-
tween low-level logic circuitry and high-power loads. Each of the four
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 loads. They feature a minimum breakdown and
sustaining voltage of 50 V. The logic inputs are compatible with TTL
and 5 V CMOS logic systems.
drive applications. With complementary control inputs and an active-
low ENABLE, the UDN2544B makes it easy to implement full stepping
of a stepper motor with only two microcontroller/microprocessor control
lines. Other typical applications include relay or solenoid driving and
incandescent or LED lamp driving.
batwing construction provides for maximum package power dissipation
in a standard DIP construction. At 25 C, and with only 1 sq. in. of
copper foil at the ground tabs, the package is capable of safely dissi-
pating 3.8 W.
1.8 A Continuous Output Current
Integral Transient-Suppression Diodes
Output Voltage to 50 V
Inputs Configured for Unipolar Stepper Motors
Active-Low Output Enable
TTL and 5 V CMOS Compatible Inputs
Combining logic gates and high-current bipolar outputs, the
This device is particularly well-suited for unipolar stepper motor
The UDN2544B is supplied in a 16-pin batwing power DIP. The
QUAD DARLINGTON
POWER DRIVER

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UDN2544B Summary of contents

Page 1

... LED lamp driving The UDN2544B is supplied in a 16-pin batwing power DIP. The batwing construction provides for maximum package power dissipation in a standard DIP construction and with only 1 sq. in. of Dwg. PP-017A copper foil at the ground tabs, the package is capable of safely dissi- pating 3 ...

Page 2

... OUT OFF OFF X OFF X OFF 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1989, 2001 Allegro MicroSystems, Inc. Limits Min. Typ. Max. — <1.0 100 50 — — — 0.9 1.0 — 1.0 1.2 — 1.3 1.6 2.4 — — ...

Page 3

... If the ENABLE input is not used, it should be tied low. All inputs will float high if open circuited. 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 design of its products. ...

Page 4

QUAD DARLINGTON POWER DRIVER 16 0.280 0.240 1 0.070 0.045 0.210 MAX 0.015 MIN 0.022 0.014 16 7.11 6.10 1 1.77 1.15 5.33 MAX 0.39 MIN 0.558 0.356 NOTES: 1. Leads and 16 may be half ...

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