Allegro UDN2544B Datasheet
OUT
OUT
GROUND
GROUND
OUT
OUT
Data Sheet
29317.6*
2544
QUAD DARLINGTON
POWER DRIVER
Combining logic gates and high-current bipolar outputs, the
UDN2544B quad Darlington power driver provides an interface between 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
1
4
2
K
3
3
4
5
6
2
7
K
8
1
IN
16
IN
15
ENABLE
14
GROUND
13
12
GROUND
V
11
10
IN
IN
9
Dwg. PP-017A
4
3
CC
2
1
to 2.5 A. The four power outputs are each comprised of an opencollector 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.
This device is particularly well-suited for unipolar stepper motor
drive applications. With complementary control inputs and an activelow 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.
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. At 25°C, and with only 1 sq. in. of
copper foil at the ground tabs, the package is capable of safely dissipating 3.8 W.
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Output Voltage, V
Output Current, I
(Peak) ........................................... 2.5 A
(Continuous) ................................. 1.8 A
Logic Supply Voltage, V
Input Voltage, V
Package Power Dissipation,
P
......................................... See Graph
D
Operating Temperature Range,
T
.................................. -20°C to +85°C
A
Storage Temperature Range,
T
................................ -55°C to +150°C
S
............................. 50 V
OUT
OUT
.................... 7.0 V
CC
.................................. 7.0 V
IN
FEATURES
■ 1.8 A Continuous Output Current
■ Output Voltage to 50 V
■ Inputs Configured for Unipolar Stepper Motors
■ Active-Low Output Enable
■ TTL and 5 V CMOS Compatible Inputs
■ Integral Transient-Suppression Diodes
Always order by complete part number: UDN2544B .
2544
QUAD DARLINGTON
POWER DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ 150°C, VCC = 4.75 V to 5.25 V.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Output Leakage Current I
Output Sustaining Voltage V
Output Saturation Voltage V
CEX
CE(sus)
CE(SAT)
Input Voltage Logic 1 V
Logic 0 V
Input Current Logic 1 V
Logic 0 V
Total Supply Current I
CC
V
= 50 V — <1.0 100 µA
OUT
I
= 1.8 A, L = 3.0 mH 50 — — V
OUT
I
= 600 mA — 0.9 1.0 V
OUT
I
= 1.0 A — 1.0 1.2 V
OUT
I
= 1.8 A — 1.3 1.6 V
OUT
IN(1) or VEN(1)
IN(0) or VEN(0)
IN(1) or VEN(1)
IN(0) or VEN(0)
= 2.4 V — — 10 µA
= 0.8 V — — -100 µA
2.4 — — V
— — 0.8 V
All Outputs ON, Outputs Open — 14 20 mA
All Outputs OFF — 0.4 2.0 mA
Clamp Diode Forward Voltage V
Clamp Diode Leakage Current I
F
R
IF = 1.0 A — 1.3 1.6 V
I
= 1.8 A — 1.6 2.0 V
F
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.
TRUTH TABLE
ENABLE IN1OUT1IN
L H ON H OFF H OFF H ON
L OFF L ON L ON L OFF
H X OFF X OFF X OFF X OFF
X = Don't care
2
OUT2IN
OUT3IN
3
115 Northeast Cutoff, Box 15036
W
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1989, 1995 Allegro MicroSystems, Inc.
4
OUT
4
5
R = 6.0°C/W
4
3
2
R = 43°C/W
θJA
1
0
25
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
50 75 100 125 150
TEMPERATURE IN °C
θJT
Dwg. GP-010B
Loading...