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QUAD POWER DRIVER
Providing improved output current limiting, the UDK/UDN/
UDQ2549B and UDK/UDN/UDQ2549EB quad power drivers combine
AND logic gates and high-current bipolar outputs with complete output
protection. Each of the four outputs will sink 600 mA in the on state.
The outputs have a minimum breakdown voltage (load dump) of 60 V
and a sustaining voltage of 40 V. The inputs are compatible with TTL
and 5 V CMOS logic systems.
Over-current protection for each channel has been designed into
these devices and is activated at approximately 1 A. It protects each
output from short circuits with supply voltages up to 25 V. When an
output current trip point is reached, that output stage is driven linearly
resulting in a reduced output current level. If an over-current or short
circuit condition continues, the thermal limiting circuits will first sense
the rise in junction temperature and then the rise in chip temperature,
further decreasing the output current. Under worst-case conditions,
the six devices in this family will tolerate short-circuits on all outputs,
simultaneously.
These devices can be used to drive various loads including
incandescent lamps (without warming or limiting resistors) or inductive
loads such as relays, solenoids, or dc stepping motors.
The suffix ‘B’ devices are 16-pin power DIPs while the suffix ‘EB’
devices are 28-lead power PLCCs for surface-mount applications.
Both packages are of batwing construction to provide for maximum
package power dissipation.
FEATURES
■ 600 mA Output Current per Channel
■ Independent Over-Current Protection for Each Driver
■ Thermal Protection for Device and Each Driver
■ Low Output-Saturation Voltage
■ Integral Output Flyback Diodes
■ TTL and 5 V CMOS Compatible Inputs
■ Pin-Compatible With UDN2543B/EB
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, VCC. . . . . . . . . . . . . . 7.0 V
Input Voltage, VIN or VEN. . . . . . . . . . 7.0 V
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range, T
A
Prefix ‘UDK’ . . . . . . . -40°C to +125°C
Prefix ‘UDN’ . . . . . . . . -20°C to +85°C
Prefix ‘UDQ’ . . . . . . . . -40
°C to +85°C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . . -55°C to +150°C
*Outputs are peak current limited at approximately
1.0 A per driver. See Circuit Description and
Applications for further information.
Always order by complete part number: a prefix to indicate operating
temperature range + the basic four-digit part number + a suffix to
indicate package style, e.g., UDK2549EB .
UDx2549B
Data Sheet
29317.8
1
2
3
14
4
5
6
7
8
9
10
11
12
13
15
16
ENABLE
GROUND
GROUND
OUT
2
K
GROUND
GROUND
OUT
3
OUT
4
K
OUT
1
V
CC
IN
1
Dwg. PP-017-1
IN
4
IN
3
IN
2
2549
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QUAD POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
FUNCTIONAL BLOCK DIAGRAM
(1 of 4 Channels)
UDx2549EB
50 75 100 125 150
10
6
4
2
0
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
TEMPERATURE IN °C
8
25
R = 6°C/W
θJT
Dwg. GP-004-1A
SUFFIX 'EB', R = 36°C/W
θJA
SUFFIX 'B', R = 43°C/W
θJA
V
CC
<<1 Ω
OUT
Dwg. FP-041
N
IN
N
THERMAL
LIMIT
ENABLE
K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GROUND
GROUND
GROUND
GROUND
Dwg. PP-019-1
K
NO
CONNECTION
ENABLE
SUPPLY
NC
NC
CC
V
OUT
1
OUT
2
OUT
3
OUT
4
IN
4
IN
3
IN
2
IN
1
NO
CONNECTION
K
Copyright © 1991, 1995, Allegro MicroSystems, Inc.
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QUAD POWER DRIVER
www.allegromicro.com
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Output Leakage Current I
CEX
V
OUT
= 60 V, VIN = 0.8 V, VEN = 2.0 V — <1.0 100 µA
V
OUT
= 60 V, VIN = 2.0 V, VEN = 0.8 V — <1.0 100 µA
Output Sustaining Voltage V
OUT(SUS)
I
OUT
= 100 mA, VIN = VEN = 0.8 V 40 —— V
Output Saturation Voltage V
OUT(SAT)
I
OUT
= 100 mA ——200 mV
I
OUT
= 400 mA ——400 mV
I
OUT
= 600 mA ——600 mV
Over-Current Trip I
TRIP
— 1.0 — A
Input Voltage Logic 1 V
IN(1)
or V
EN(1)
2.0 —— V
Logic 0 V
IN(0)
or V
EN(0)
——0.8 V
Input Current Logic 1 V
IN(1)
or V
EN(1)
= 2.0 V ——10 µA
Logic 0 V
IN(0)
or V
EN(0)
= 0.8 V ——-10 µA
Total Supply Current I
CC
I
OUT
= 600 mA, VIN* = VEN = 2.0 V ——65 mA
All Outputs OFF ——15 mA
Clamp Diode Forward Voltage V
F
IF = 1.0 A ——1.7 V
Clamp Diode Leakage Current I
R
VR = 60 V, D1 + D2 or D3 + D
4
——50 µA
Thermal Limit T
J
— 165 — °C
Limits
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 (prefix ‘UDN’) or over operating
temperature range (prefix ‘UDK’ or ‘UDQ’), VCC = 4.75 V to 5.25 V
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QUAD POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
CIRCUIT DESCRIPTION AND APPLICATION
INCANDESCENT LAMP DRIVER
High incandescent lamp turn-ON/in-rush currents can contribute to
poor lamp reliability and destroy semiconductor lamp drivers. Warming
or current-limiting resistors protect both driver and lamp but use significant power either when the lamp is OFF or when the lamp is ON,
respectively. Lamps with steady-state current ratings up to 600 mA
can be driven by these devices without the need for warming (parallel)
or current-limiting (series) resistors.
When an incandescent lamp is initially turned ON, the cold filament
is at minimum resistance and would normally allow a 10x to 12x in-rush
current. With the these drivers, during turn-ON, the high in-rush current
is sensed by the internal low-value sense resistor. Drive current to the
output stage is then diverted by the shunting transistor, and the load
current is momentarily limited to approximately 1.0 A. During this short
transition period, the output current is reduced to a value dependent on
supply voltage and filament resistance. During lamp warmup, the
filament resistance increases to its maximum value, the output stage
goes into saturation and applies maximum rated voltage to the lamp.
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 which 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
+ VZ + VF ≤ 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 reduced, 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 affected output
stage and reducing the output current to a value dependent on supply
voltage and load resistance.
Continuous or multiple overload conditions causing the chip temperature to reach approximately 165°C will result in an additional
reduction in output current to maintain a safe level.
If the fault condition is corrected, the output stage will return to its
normal saturated condition.
TYPICAL OUTPUT
CHARACTERISTIC
V
OUT(SAT)
Dwg. GP-013
OUTPUT VOLTAGE, V
OUT
OUTPUT CURRENT, I
OUT
T < 150°C
T = 165°C
J
J
JUNCTION
TEMP. LIMIT
NOT TO SCALE
TRIP
I
THERMAL
GRADIENT
SENSING
TYPICAL OUTPUT BEHAVIOR
NORMAL LAMP IN-RUSH CURRENT
TIM
E
THERMAL GRADIENT SENSING
CURRENT LIMIT
Dwg. WP-008
NOT TO SCALE
I
TRIP
0
LAMP CURRENT
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QUAD POWER DRIVER
www.allegromicro.com
UDN2549B and UDQ2549B
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative
3. Lead thickness is measured at seating plane or below.
4. Webbed lead frame. Leads 4, 5, 12, and 13 are internally one piece.
0.508
0.204
7.62
BSC
Dwg. MA-001-17A mm
10.92
MAX
16
1
8
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
9
19.68
18.67
NOTE 4
0.020
0.008
0.300
BSC
Dwg. MA-001-17A in
0.430
MAX
16
1
8
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
9
0.775
0.735
NOTE 4
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QUAD POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
UDN2549EB and UDQ2549EB
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative
3. Webbed lead frame. Leads 5 through 11 and 19 through 25 are internally one piece.
18 12
0.020
MIN
0.050
BSC
128
INDEX AREA
Dwg. MA-005-28A in
0.026
0.032
0.013
0.021
26
25
19
11
4
5
0.165
0.180
0.495
0.485
0.456
0.450
0.495
0.485
0.456
0.450
0.219
0.191
0.219
0.191
0.51
MIN
4.57
4.20
1.27
BSC
12.57
12.32
11.582
11.430
128
INDEX AREA
Dwg. MA-005-28A mm
0.812
0.661
0.331
0.533
12.57
12.32
26
25
19
18 12
11
4
5
11.58
11.43
5.56
4.85
5.56
4.85
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QUAD POWER DRIVER
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 responsibility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.
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QUAD POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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
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 7 – – X – – 2003
50 8 – – X – – 2803
50 8 – – X saturated – 2596
60 4 – – X saturated X 2557
95 7 – – X – – 2023
95 8 – – X – – 2823
350 50 4 – X X – – 5800
50 7 – – X – – 2004
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 – – 2024
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
700 60 4 – – X saturated X 2543 and 2559
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.
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