Allegro UDN2917EB, UDQ2917EB Datasheet

REF 1

V

44

PWM 1

24

21

I

1

PHASE

43

θ

PWM 2

25

REF 2

V

ENABLE

424140

1

θ

26

PHASE

1

1

RC

1

EN

2

2

EN

27

2

2

ENABLE

1

1A

OUT

6

GND

7

8

9

10

11

12

13

14

15

16

GND

17 29

18

2A

OUT

1B

1

E

SENSE

4

5

1

2

19

20

2

2

E

SENSE

OUT

3

21

OUT

2B

11

10

I

I

2

1

BB

V

22

23

20

I

LOAD SUPPLY

ABSOLUTE MAXIMUM RATINGS

at TJ ≤ +150°C

LOGIC SUPPLY

CC

V

39

38

37

36

35

34

33

32

31

30

28

2

RC

Dwg. PP-021

Dwg. PP-021

GND

GND

29319.22†

2 9 1 7

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

The UDN2917EB motor driver is designed to drive both windings

of a bipolar stepper motor or bidirectionally control two dc motors. Both

bridges are capable of sustaining 45 V and include internal pulse-width modula-

tion (PWM) control of the output current to 1.5 A.

For PWM current control, the maximum output current is determined by the

user’s selection of a reference voltage and sensing resistor. Two logic-level

inputs select output current limits of 0, 33%, 67%, or 100% of the maximum

level. A PHASE input to each bridge determines load current direction. Active-

low ENABLE inputs control the four drivers in each bridge.

The bridges include both ground clamp and flyback diodes for protection

against inductive transients. Internally generated delays prevent cross-over

currents when switching current direction. Special power-up sequencing is not

required. Thermal protection circuitry disables the outputs if the chip tempera-

ture exceeds safe operating limits.

The UDN2917EB is supplied in a 44-lead power PLCC for surface-mount

applications. Its batwing construction provides for maximum package power

dissipation in the smallest possible construction. The UDN2917EB is available

for operation from -40°C to +85°C. To order, change the prefix from 'UDN' to

'UDQ'. This device is also available on special order for operation to +125°C.

Data Sheet

Motor Supply Voltage, VBB.................... 45 V

Output Current, I

(tw ≤ 20 µs) ..... ±1.75 A

OUT

(Continuous) ............................... ±1.5 A

Logic Supply Voltage, V

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

CC

Logic Input Voltage Range,

VIN................................ -0.3 V to +7.0 V

Output Emitter Voltage, V

................... 1.0 V

E

Package Power Dissipation,

PD......................................... See Graph

Operating Temperature Range,

T

.................................. -20°C to +85°C

A

Storage Temperature Range,

T

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

S

Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under any
set of conditions, do not exceed the specified peak
current rating or a junction temperature of +150°C.

FEATURES

■ 1.5 A Continuous Output Current

■ 45 V Output Sustaining Voltage

■ Internal Clamp Diodes

■ Digital Control of Output Current

■ Internal Thermal Shutdown Circuitry

■ Similar to Dual PBL3770

Always order by complete part number: UDN2917EB .

2917

DUAL FULL-BRIDGE
PWM MOTOR DRIVER

PWM CURRENT-CONTROL CIRCUITRY

CHANNEL 1
PIN NUMBERS
SHOWN.

V

44

REF

20 kΩ

OUT

V

BB

22

OUT

B

36

A

5

E

12.5

10

7.5

÷10

40 kΩ

10 kΩ

2

I

0

1

I

1

R

S

R

C

SENSE

–

4

+

C

C

ONE

SHOT

41

RC

R

T

SOURCE
DISABLE

C

T

Dwg. EP-007-2A

TRUTH TABLE

R

=

θJT

Enable Phase Out

6

°C

/W

LHHL
LLLH

A

HXZZ

X = Don’t care
Z = High impedance

Out

B

5.0

2.5

0

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

25

R = 30

θ

J

A

°C/W

50 75 100 125 150

TEMPERATURE IN °C

Dwg. GP-020B

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

Copyright © 1991, 2000 Allegro MicroSystems, Inc.

2917

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

ELECTRICAL CHARACTERISTICS at T

= +25°C, VBB = 45 V, VCC = 5.0 V, V

A

= 5.0 V (unless

REF

otherwise noted).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Output Drivers (OUT

Motor Supply Range V

Output Leakage Current I

Output Sustaining Voltage V

Output Saturation Voltage V

Clamp Diode Leakage Current I

Clamp Diode Forward Voltage V

Driver Supply Current I

Control Logic

or OUTB)

A

BB

CEX

CE(sus)

CE(SAT

R

F

BB(ON)

I

BB(OFF)

10 — 45 V

V

= V

OUT

BB

= 0 — <-1.0 -50 µA

V

OUT

I

= ±1.5 A, L = 3.5 mH 45 —— V

OUT

)

Sink Driver, I

Sink Driver, I

Source Driver, I

Source Driver, I

= +1.0 A* — 0.5 0.7 V

OUT

= +1.5 A* — 0.8 1.0 V

OUT

= -1.0 A* — 1.8 1.9 V

OUT

= -1.5 A* — 1.9 2.1 V

OUT

— <1.0 50 µA

VR = 45 V — <1.0 50 µA

IF = 1.5 A — 1.6 2.0 V

Both Bridges On, No Load — 9.0 12 mA

Both Bridges Off — 4.0 6.0 mA

Input Voltage V

Input Current I

Reference Voltage Range V

Current Limit Threshold V
(at trip point)

Thermal Shutdown Temp. T

Total Logic Supply Current I

IN(1)

V

IN(0)

IN(1)

I

IN(0)

REF

REF/VSENSE

J

CC(ON)

I

CC(OFF)

All Inputs 2.4 —— V

All Inputs ——0.8 V

V

= 2.4 V — <1.0 20 µA

IN

VIN = 0.8 V — -3.0 -200 µA

Operating 1.5 — 7.5 V

I0 = I1 = 0.8 V 9.5 10 10.5 —

= 2.4 V, I1= 0.8 V 13.5 15 16.5 —

I

0

= 0.8 V, I1 = 2.4 V 25.5 30 34.5 —

I

0

I0 = I1 = VEN = 0.8 V, No Load — 90 105 mA

I0 = I1 = 2.4 V, No Load — 10 12 mA

Negative current is defined as coming out of (sourcing) the specified device pin.

Typical Data is for design information only.

* Pulse test (<10 ms).

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— 170 — °C