2543
UDN/UDQ2543B
OUT
4
K
OUT
3
GROUND
GROUND
OUT
2
K
OUT
1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
4
IN
3
ENABLE
GROUND
GROUND
V
CC
IN
2
IN
1
PROTECTED
QUAD POWER DRIVER
Providing interface between low-level logic and power loads to
100 W, the UDx2543B and UDx2543EB quad power drivers combine
AND logic gates and high-current bipolar outputs. Each of the four
independent outputs can sink up to 700 mA in the ON state. The
outputs have a minimum breakdown voltage (load dump) of 60 V and
a sustaining voltage of 35 V. The inputs are compatible with most
TTL, DTL, LSTTL, and 5 V CMOS and PMOS logic systems.
Over-current protection has been designed into each channel of
the UDx2543B/EB and typically occurs at 1 A. It protects any one
channel from output short circuits with supply voltages up to 25 V.
When the maximum output current is reached, that output stage is
driven linearly. If the over-current condition continues, that output’s
thermal limiting will operate, limiting that output’s power dissipation to
approximately 2.4 W. The outputs also include diodes for voltage
clamping with inductive loads such as relays, solenoids, or dc stepper
motors.
These devices are supplied in a 16-pin power DIP of batwing
construction (suffix ‘B’) to provide for maximum package power dissi-
pation. They are also available in a 28-lead PLCC (suffix ‘EB’) for
surface-mount applications. All devices are rated for continuous
operation over the temperature range of -20°C to +85°C (UDN2543B/
EB) or for use in automotive applications over an extended tempera-
ture range as the UDQ2543B/EB.
Data Sheet
29317.2B
Dwg. PP-017-1
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
°
C
Output Voltage, V
OUT
. . . . . . . . . . . . .
60 V
Over-Current Protected Output Voltage,
V
OUT
. . . . . . . . . . . . . . . . . . . . . . .
25 V
Output Current, I
OUT
. . . . . . . . . . . . .
1.0 A*
Supply Voltage, V
CC
. . . . . . . . . . . . . .
7.0 V
Input Voltage, V
IN
or V
EN
. . . . . . . . . .
18 V
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . . . . . .
See Graph
Operating Temperature Range, T
A
(UDN2543B/EB)
. . . . -20
°
C to +85
°
C
(UDQ2543B/EB)
. . . . -40
°
C to +85
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . .
-55
°
C to +150
°
C
*Outputs are peak current limited at approxi-
mately 1.0 A per driver. See Circuit Description
and Applications for further information.
FEATURES
I
I
I
I
I
700 mA Output Current per Channel
Low Output-Saturation Voltage
Integral Output Transient-Suppression Diodes
TTL, CMOS, PMOS, NMOS Compatible Inputs
Independent Over-Current Protection for Each Output
Always order by complete part number:
Part Number
UDN2543B
UDN2543EB
UDQ2543B
UDQ2543EB
Package
16-Pin DIP
28-Lead PLCC
16-Pin DIP
28-Lead PLCC
Operating Temperature
-20
°
C to +85
°
C
-20
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
2543
PROTECTED
QUAD POWER DRIVER
FUNCTIONAL BLOCK DIAGRAM
(1 OF 4 CHANNELS)
V CC
K
ENABLE
IN N
THERMAL
LIMIT
OUTN
<<1
Ω
Dwg. FP-041
NOTE: These devices do not include an absolute thermal shutdown. Package power dissipation under fault conditions (2.4 W in the faulted
channel) must therefore be evaluated at maximum operating temperature.
UDN/UDQ2543EB
10
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
OUT
2
OUT
1
NO
CONNECTION
ENABLE
26
IN
1
28
8
R
θJT
K
= 6°C/W
GROUND
5
6
7
8
NC
25
24
23
22
21
20
19
NC
15
12
13
14
16
17
27
4
2
3
1
IN
2
GROUND
6
4
SUFFIX 'EB', R
θJA
= 36°C/W
9
10
2
SUFFIX 'B', R
θJA
= 43°C/W
GROUND
11
V
CC
18
GROUND
NO
CONNECTION
OUT
4
OUT
3
IN
4
IN
3
25
50
75
100
TEMPERATURE IN
°C
125
150
SUPPLY
0
K
Dwg. GP-004-1A
Dwg. PP-019-1
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1986, 1993, Allegro MicroSystems, Inc.
2543
PROTECTED
QUAD POWER DRIVER
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C (UDN2543B/EB) or over operating
temperature range (UDQ2543B/EB only), V
CC
= 4.75 V to 5.25 V
Limits
Characteristic
Output Leakage Current
Symbol
I
CEX
Test Conditions
V
OUT
= 60 V, V
IN
= 0.8 V, V
EN
= 2.0 V
V
OUT
= 60 V, V
IN
= 2.0 V, V
EN
= 0.8 V
Output Sustaining Voltage
Output Saturation Voltage
V
OUT(SUS)
V
OUT(SAT)
I
OUT
= 100 mA, V
IN
= V
EN
= 0.8 V
I
OUT
= 100 mA, V
IN
= V
EN
= 2.0 V
I
OUT
= 400 mA, V
IN
= V
EN
= 2.0 V
I
OUT
= 700 mA, V
IN
= V
EN
= 2.0 V
Input Voltage
Logic 1
Logic 0
Input Current
Logic 1
Logic 0
Total Supply Current
I
CC
V
IN(1)
or V
EN(1)
V
IN(0)
or V
EN(0)
V
IN(1)
or V
EN(1)
= 2.0 V
V
IN(0)
or V
EN(0)
= 0.8 V
I
OUT
= 700 mA*, V
IN†
= V
EN
= 2.0 V
Outputs Open, V
IN†
= 0.8 V, V
EN
= 2.0 V
Clamp Diode Forward Voltage
V
F
I
F
= 1.0 A
I
F
= 1.5 A
Clamp Diode
Leakage Current
I
R
V
R
= 60 V, V
IN
= V
EN
= 2.0 V,
D
1
+ D
2
or D
3
+ D
4
Min.
—
—
35
—
—
—
2.0
—
—
—
—
—
—
—
—
Max.
100
100
—
200
400
600
—
0.8
20
-10
65
15
1.6
2.0
50
Units
µA
µA
V
mV
mV
mV
V
V
µA
µA
mA
mA
V
V
µA
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.
* Pulse test, allowable package power dissipation will be exceeded at increased ambient temperatures.
† All inputs simultaneously, all other tests are performed with each input tested separately.
2543
PROTECTED
QUAD POWER DRIVER
TYPICAL OUTPUT BEHAVIOR
CIRCUIT DESCRIPTION AND APPLICATION
INCANDESCENT LAMP DRIVER
For incandescent lamp applications, the UDx2549B/EB or
UDx2559B/EB, with improved shortcircuit protection and thermal
limiting, are recommended.
INDUCTIVE LOAD DRIVER
Bifilar (unipolar) stepper motors, relays, or solenoids can be driven
directly. The internal flyback diodes prevent damage to the output
transistors by suppressing the high-voltage spikes that occur when
turning OFF an inductive load. For rapid current decay (fast turn-OFF
speeds), the use of Zener diodes will raise the flyback voltage and
improve performance. However, the peak voltage must not exceed the
specified minimum sustaining voltage (V
SUPPLY
+ V
Z
+ V
F
≤
V
OUT(SUS)
).
FAULT CONDITIONS
In the event of a shorted load, the load current will attempt to
increase. As described above, the drive current to the affected
output stage is diverted, causing the output stage to go linear, limiting
the peak output current to approximately 1 A. As the power dissipation
of that output stage increases, a thermal gradient sensing circuit will
become operational, further decreasing the drive current to the af-
fected output stage and reducing the output current to a value depen-
dent on supply voltage (I
OUT
≈
2.4/V
SUPPLY
). If the fault condition is
corrected, the output stage will return to its normal saturated condition.
Due to the independent operation of the four channels, only
a single channel should be shorted at a time. Multiple overload
conditions may be tolerated provided rated package power
dissipation is not exceeded.
NOT TO SCALE
OUTPUT CURRENT
SHORT CIRCUIT
NORMAL LOAD
CURRENT LIMIT (12 V SUPPLY)
CURRENT LIMIT (24 V SUPPLY)
TIME
Dwg. WP-013-1
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2543
PROTECTED
QUAD POWER DRIVER
UDN2543B and UDQ2543B
Dimensions in Inches
(controlling dimensions)
0.020
0.008
16
NOTE 4
9
0.430
0.280
0.240
MAX
0.300
BSC
1
0.070
0.045
0.100
0.775
0.735
BSC
8
0.005
MIN
0.210
MAX
0.015
MIN
0.150
0.115
0.022
0.014
Dwg. MA-001-17A in
Dimensions in Millimeters
(for reference only)
0.508
0.204
16
NOTE 4
9
10.92
7.11
6.10
MAX
7.62
BSC
1
1.77
1.15
2.54
19.68
18.67
BSC
8
0.13
MIN
5.33
MAX
0.39
MIN
3.81
2.93
0.558
0.356
Dwg. MA-001-17A mm
NOTES: 1.
2.
3.
4.
Exact body and lead configuration at vendor’s option within limits shown.
Lead spacing tolerance is non-cumulative
Lead thickness is measured at seating plane or below.
Webbed lead frame. Leads 4, 5, 12, and 13 are internally one piece.
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