Datasheet 2547 Datasheet (ALLEGRO)

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2547

PROTECTED
QUAD POWER DRIVERS

UDx2547B

FAULT

GROUND

GROUND

CONNECT.

1

OUT

2

1

OUT

3

2

4

5

6

OUT

3

NO

7

OUT

89

4

16

IN

IN

15

14

ENABLE

13

GROUND

12

GROUND

V

11

CC

10

IN

IN

Dwg. PP-018A

1

2

SUPPLY

3

4

2547

PROTECTED

QUAD POWER DRIVERS

Providing interface between low-level logic and power loads, the
UDK/UDN/UDQ2547B and UDK/UDN/UDQ2547EB quad power
drivers combine 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 and include internal
pull-down resistors to ensure that the outputs remain OFF if the inputs
are open-circuited.

Over-current protection for each channel has been designed into
these devices and is activated at approximately 1.3 A. It protects each
output from short circuits with supply voltages up to 25 V. When a
maximum driver output current is reached, that output drive is reduced
linearly, maintaining a constant load current. If the over-current or
short circuit condition continues, each channel has an independent
thermal limit circuit which will sense the rise in junction temperature
and turn OFF the individual channel that is at fault. Foldback circuitry
decreases the output current if excessive voltage is present across the
output and assists in keeping the device within its SOA (safe operating
area).

Data Sheet

29317.4C

ABSOLUTE MAXIMUM RATINGS

at T

= 25°C

A

Output Voltage, V
Over-Current Protected Output Voltage,

V

............................................... 25 V

OUT

Output Current, I
FAULT Output Voltage, V
Supply Voltage, V
Input Voltage, V
Package Power Dissipation,

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

P

D

Operating Temperature Range, T

Prefix ‘UDK’ ............... -40°C to +125°C

Prefix ‘UDN’ ................. -20

Prefix ‘UDQ’................. -40

Storage Temperature Range,

T

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

S

*Outputs are current limited at approximately

1.3 A per driver and junction temperature limited
if current in excess of 1.3 A is attempted. See
Circuit Description and Application for further
information.

............................ 60 V

OUT

.......................... 1.3 A*

OUT

................... 40 V

F

............................ 7.0 V

CC

or VEN...................... 7.0 V

IN

A

°C to +85°C
°C to +85°C

Each output also includes diagnostics for increased device protec­tion. If any output is shorted or opened, the diagnostics can signal the
controlling circuitry through a common FAULT pin.

These devices can be used to drive various resistive loads includ­ing incandescent lamps (without warming or limiting resistors). With
the addition of external output clamp diodes, they can be used to drive
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

■ Output SOA Protection ■ Low Output-Saturation Voltage

■ Diagnostic FAULT Output ■ TTL and 5 V CMOS Compatible Inputs

■ Independent Over-Current Protection for Each Driver

■ Independent Thermal Protection for Each Driver

■ 600 mA Output Current per Channel

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., UDK2547EB .

2547

PROTECTED
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10

8

R = 6°C/W

θJT

6

4

SUFFIX 'EB', R = 36°C/W

2

SUFFIX 'B', R = 43°C/W

0

25

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

θJA

θJA

50 75 100 125 150

TEMPERATURE IN °C

Dwg. GP-004-1A

GROUND

GROUND

UDx2547EB

2

OUT

4

5

6

7

8

9

10

11

12

3

OUT

NO

CONNECTION

3

NC

NC

13

NO

CONNECTION

1

OUT

2

FAULT

14

4

OUT

FAULT

1

NC

15

NO

CONNECTION

1

2

IN

28

16

IN

ENABLE

IN

26

27

GROUND

25

24

23

22

21

20

19

GROUND

V

CC

18

17

3

4

IN

SUPPLY

Dwg. PP-019

ABLE

IN

FUNCTIONAL BLOCK DIAGRAM

FAULT

COMMON CONTROL

ONE OF FOUR DRIVERS

OUT

N

THERMAL

SHUTDOWN

CURRENT

LIMIT

<<1 Ω

N

Dwg. FP-007

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

W
Copyright © 1989, 1993, Allegro MicroSystems, Inc.

2547

PROTECTED
QUAD POWER DRIVERS

ELECTRICAL CHARACTERISTICS at T
temperature range (prefix ‘UDK’ or ‘UDQ’), V

= +25°C (prefix ‘UDN’) or over operating

A

= 4.75 V to 5.5 V

CC

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Output Leakage Current* I

Output Sustaining Voltage V
Output Saturation Voltage V

Over-Current Limit I

OUT

OUT(SUS)

OUT(SAT)

OUT

Input Voltage Logic 1 V

Logic 0 V

Input Current Logic 1 V

Logic 0 V

Fault Output Leakage Current I

F

V

= 60 V, VIN = 0.8 V, VEN = 2.0 V — 30 150 µA

OUT

V

= 60 V, VIN = 2.0 V, VEN = 0.8 V — 30 150 µA

OUT

I

= 100 mA, V

OUT

I

= 400 mA — — 300 mV

OUT

I

= 500 mA — — 400 mV

OUT

I

= 600 mA — — 550 mV

OUT

5 ms PulseTest, V

or V

IN(1)

lN(0)

IN(1)

IN(0)

or V

or V
or V

EN(1)

EN(0)

EN(1)

EN(0)

= 0.8 V, V

IN

= 5.0 V — 1. 3 1.7 A

OUT

= Open 40 — — V

CC

2.0 — — V

— — 0.8 V
= 2.0 V — — 60 µA
= 0.8 V 10 — — µA

VF = 40 V — <1.0 2.0 µA

Fault Output Current I

Fault Output Saturation Voltage V
Total Supply Current I

Thermal Shutdown T

F

F(SAT)

CC

J

Thermal Hysteresis ∆T

Typical Data is for design information only.
*Measurement includes XOR input current
and other elements.

VF = 40 V, Driver Outputs Open,

= 0.8 V, V

V

IN

= 2.0 V 40 60 80 µA

EN

IF = 30 µA — 0.1 0.4 V
All Outputs ON — 45 50 mA
All Outputs OFF — 6.0 10 mA

— 165 — °C

J

—15— °C

TRUTH TABLE

STATUS IN

N

Normal Load H H L H

LH HH
XL HH

Over-Current or
Short to Supply H H R L

Thermal Fault H H H L
Open Load or

Short to Ground L H L L

X = Don’t care. R = Linear drive, current limited.

ENABLE OUT

N

FAULT

2547

PROTECTED
QUAD POWER DRIVERS

NORMAL LAMP IN-RUSH CURRENT

NOT TO SCALE

LAMP CURRENT

CURRENT LIMIT

SHORT CIRCUIT

CIRCUIT DESCRIPTION AND APPLICATION

These devices monitor their outputs for open or shorted conditions.
Both conditions are sensed by comparing the input and output states.
Note that the FAULT output is operational only if the ENABLE input is
high. When a fault condition is sensed, the FAULT output will go to a
low state. An external FAULT output filter capacitor (0.1µF) is recom­mended to eliminate erroneous switching.

INCANDESCENT LAMP DRIVER

High incandescent lamp turn-ON/in-rush currents can contribute to
poor lamp reliability and destroy semiconductor lamp drivers.

THERMAL SHUTDOWN

THERMAL HYSTERESIS

TIME

Dwg. WP-005A

Warming (parallel) or current-limiting (series) 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 without the need for warming or
current-limiting resistors, if lamp turn-ON time is not a concern.

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 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 diverted by the shunting transistor, the output stage
operates in a linear mode, and the load current is limited to approxi­mately 1.3 A. During lamp warmup, the filament resistance increases
to its maximum value, the output driver goes into saturation and applies
maximum rated voltage to the lamp.

INDUCTIVE LOAD DRIVER

With the addition of external clamp diodes, bifilar (unipolar)
stepper motors and other inductive loads can be driven directly.
The external 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

+ VZ + VF ≤ V

SUPPLY

OUT(SUS)

).

OVER-CURRENT CONDITIONS

In the event of a shorted load, or stalled motor, the load current
will attempt to increase. As described above, the drive current to the
affected output stage is linearly reduced (limiting the load current to
about 1.3 A), causing the output stage to go linear. As the junction
temperature of the output stage increases, the thermal shutdown circuit
will shut OFF the affected output. If the fault condition is corrected, the
output driver will return to its normal saturated condition.

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

2547

PROTECTED
QUAD POWER DRIVERS

16

0.280

0.240

UDN2547B and UDQ2547B

Dimensions in Inches

(controlling dimensions)

NOTE 4

9

0.020

0.008

0.300

BSC

0.430

MAX

0.210

MAX

7.11

6.10

0.015

MIN

1

0.070

0.045

16

1

1.77

1.15

0.022

0.014

8

0.775

0.735

0.100

BSC

Dimensions in Millimeters

(for reference only)

NOTE 4

19.68

18.67

2.54

BSC

9

8

0.005

0.150

0.115

0.13

MIN

MIN

0.508

0.204

Dwg. MA-001-17A in

10.92

MAX

7.62

BSC

5.33

MAX

0.39

MIN

0.558

0.356

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.

3.81

2.93

Dwg. MA-001-17A mm

2547

PROTECTED
QUAD POWER DRIVERS

UDN2547EB and UDQ2547EB

Dimensions in Inches

(controlling dimensions)

18 12

0.219

0.191

0.219

0.191

0.013

0.021

0.050

BSC

0.331

0.533

0.020

MIN

0.165

0.180

19

0.026

0.032

0.456

0.450

0.495

0.485

25

Dimensions in Millimeters

(for reference only)

19

INDEX AREA

26

18 12

128

0.456

0.450

0.495

0.485

11

5

4

Dwg. MA-005-28A in

11

5.56

4.85

12.57

1.27

BSC

5.56

4.85

0.51

MIN

4.57

4.20

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.

12.32

0.812

0.661

11.58

11.43

25

26

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

11.582

11.430

12.57

12.32

128

INDEX AREA

5

4

Dwg. MA-005-28A mm

2547

PROTECTED
QUAD POWER DRIVERS

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.

The information included herein is believed to be accurate and reliable. However, Allegro
MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or
other rights of third parties which may result from its use.

2547

PROTECTED
QUAD POWER DRIVERS

POWER SINK DRIVERS

SELECTION GUIDE

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

Output Ratings *

Serial Latched Diode Saturated Internal

Features

mA V # Input Drivers Clamp Outputs Protection Part Number

100 20 8 – – – X – 2595

30 32 X X – – – 5833

40 32 X X – X – 5832
250 135 7 – – X – – 7003
300 45 1 Hall Sensor/Driver X – X 5140

50 7 – – X – – 2003

50 8 – – X – – 2803

50 8 – – X X – 2596

60 2 Hall Sensor/Driver – X – 5275

60 4 – – X X 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

80 8 X X – – – 5822

50 8 X X X – – 5841

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 – – – X X 2547

60 4 – – X X X 2549
700 60 4 – – X X X 2543 and 2559
750 50 8 – – X X – 2597
900 14 2 Hall Sensor/Driver X X X 3625

26 2 Hall Sensor/Driver X X 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
1600 50 9 X X – – X 5829
1800 50 4 – – X – – 2544

50 4 – – X – – 2540

3000 46 4 Stepper Motor Controller/Driver MOS – 7026
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.

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