Datasheet UDN2916LB, UDN2916EB, UDN2916B Datasheet (Allegro)

UDN2916B

OUT

SENSE

OUT

GROUND

I

PHASE

V

REF 2

RC

1

1A

2

2A

3

E

2

4

2

5

2B

6

7

8

02

9

12

10

θ

2

PWM 2

11

12

BB

1

PWM 1

θ

V

CC

LOAD

24

SUPPLY

E

23

1

SENSE

22

21

OUT

1B

20

I

01

GROUND

19

18

GROUND

17

I

11

16

PHASE

1

15

V

REF 1

14

RC

1

LOGIC

13

SUPPLY

Dwg. PP-005

V

ABSOLUTE MAXIMUM RATINGS

at T

150°C

J ≤

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

Output Current, I

(Peak) ........................................ +1.0 A

(Continuous) .......................... +750 mA

Logic Supply Voltage, V Logic Input Voltage Range,

V

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

IN

Output Emitter 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

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.

OUT

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

CC

................... 1.5 V

E

Data Sheet

29319.20C

2916

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

The UDN2916B, UDN2916EB, and UDN2916LB motor drivers are 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 modulation (PWM) control of the output current to 750 mA. The outputs have been optimized for a low output saturation voltage drop (less than 1.8 V

1

total source plus sink at 500 mA).

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.

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 temperature exceeds safe operating limits.

The UDN2916B is supplied in a 24-pin dual in-line plastic batwing package with a copper lead-frame and heat sinkable tabs for improved power dissipation capabilities. The UDN2916EB is supplied in a 44lead power PLCC for surface mount applications. The UDN2916LB is supplied in a 24-lead surface-mountable SOIC. Their batwing construction provides for maximum package power dissipation in the smallest possible construction. The UDN2916B/EB/LB are available for operation from -40°C to +85°C. To order, change the prefix from 'UDN' to 'UDQ'. These devices are also available on special order for operation to +105°C.

FEATURES

■ 750 mA Continuous Output Current

■ 45 V Output Sustaining Voltage

■ Internal Clamp Diodes

■ Internal PWM Current Control

■ Low Output Saturation Voltage

■ Internal Thermal Shutdown Circuitry

■ Similar to Dual PBL3717, UC3770

Always order by complete part number:

Part Number Package

UDN2916B 24-Pin DIP

UDN2916EB 44-Lead PLCC

UDN2916LB 24-Lead SOIC

2916

DUAL FULL-BRIDGE MOTOR DRIVER

UDN2916EB

1

1A

OUT

6

GND

7

8

9

10

11

12

13

14

15

16

GND

17 29

NC NC

18

2A

OUT

1B

1

OUT

E

SENSE

3

4

5

1

2

19

21

20

2

E

SENSE

NO CONNECTION

LOAD SUPPLY

2

BB

V

22

NO CONNECTION

1

23

OUT

1

REF 1

11

01

I

2B

I

44

24

02

I

PWM 1

PHASE

43

θ

1

25

12

I

PWM 2

θ

V

42

2

26

2

PHASE

UDN2916LB

RC

41

27

REF 2

V

1

V

LOGIC SUPPLY

40

CC

39

38

37

36

35

34

33

32

31

30

28

2

RC

Dwg. PP-006A

GND

5

R = 6.0°C/W

θJT

4

SUFFIX 'EB', R = 30°C/W

θJA

SUFFIX 'B', R = 40°C/W

θJA

3

2

1

SUFFIX 'LB', R = 55°C/W

θJA

0

25

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

50 75 100 125 150

TEMPERATURE IN °C

Dwg. GP-035A

PWM CURRENT-CONTROL CIRCUITRY

I

PHASE

V

REF 2

RC

GROUND

LOGIC SUPPLY

RC

V

REF 1

PHASE

I

'B' PACKAGE, CHANNEL 1 PIN NUMBERS

1

02

2

12

3

2

PWM 2

θ

2

4

5

2

6

BB

7

8

V

9

1

V

CC

10

11

θ

1

12

11

PWM 1

24

LOAD SUPPLY

OUT

23

2B

SENSE

22

2

21

20

19

18

17

16

1

15

14

13

E

2

OUT

2A

GROUND

OUT

1A

E

1

SENSE

OUT

1B

I

01

Dwg. PP-047

2

1

SHOWN.

20

I

0

17

I

1

V

REF

40 kΩ

15

20 kΩ

10 kΩ

PHASE OUT

HHL

LLH

V

BB

24

OUT

B

21

23

E

SENSE

22

R

C

÷10

1

OUT

A

R

S

TRUTH TABLE

A

R

T

OUT

SHOT

B

ONE

14

RC

C

T

SOURCE DISABLE

Dwg. EP-007B

– +

C

115 Northeast Cutoff, Box 15036 W

2916

DUAL FULL-BRIDGE

MOTOR DRIVER

ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ 150°C, VBB = 45 V, VCC = 4.75 V to 5.25 V,

V

= 5.0 V (unless otherwise noted).

REF

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Output Drivers (OUT

or OUTB)

A

Motor Supply Range V

Output Leakage Current I

Output Sustaining Voltage V

Output Saturation Voltage V

CE(sus)

CE(SAT)

Clamp Diode Leakage Current I

Clamp Diode Forward Voltage V

Driver Supply Current I

BB(ON)

I

BB(OFF)

Control Logic

Input Voltage V

V

Input Current I

Reference Voltage Range V

Current Limit Threshold V (at trip point)

REF/VSENSE

BB

CEX

R

IN(1)

IN(0)

IN(1)

REF

10 — 45 V

V

= V

OUT

V

OUT

I

OUT

Sink Driver, I

Source Driver, I

BB

= 0 — <-1.0 -50 µA

= ±750 mA, L = 3.0 mH 45 —— V

= +500 mA — 0.4 0.6 V

OUT

= +750 mA — 1.0 1.2 V

OUT

= -500 mA — 1.0 1.2 V

OUT

= -750 mA — 1.3 1.5 V

OUT

— < 1.0 50 µA

VR = 45 V — < 1.0 50 µA

F

IF = 750 mA — 1.6 2.0 V

Both Bridges ON, No Load — 20 25 mA

Both Bridges OFF — 5.0 10 mA

All inputs 2.4 —— V

All inputs ——0.8 V

VIN = 2.4 V — <1.0 20 µA

= 0.8 V — - 3.0 -200 µA

V

IN

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

I0 = 0.8 V, I1 = 2.4 V 25.5 30 34.5 —

Thermal Shutdown Temperature T

Total Logic Supply Current I

CC(ON)

I

CC(OFF)

J

— 170 — °C

I0 = I1 = 0.8 V, No Load — 40 50 mA

I0 = I1 = 2.4 V, No Load — 10 12 mA

2916

DUAL FULL-BRIDGE MOTOR DRIVER

APPLICATIONS INFORMATION

PWM CURRENT CONTROL

The UDN2916B/EB/LB dual bridges are designed to drive both windings of a bipolar stepper motor. Output current is sensed and controlled independently in each bridge by an external sense resistor (R comparator, and monostable multivibrator.

When the bridge is turned ON, current increases in the motor winding and it is sensed by the external sense resistor until the sense voltage (V set at the comparator’s input:

I

TRIP

= V

REF

SENSE

/10 R

The comparator then triggers the monostable which turns OFF the source driver of the bridge. The actual load current peak will be slightly higher than the trip point (especially for low-inductance loads) because of the internal logic and switching delays. This delay (td) is typically 2 µs. After turn-off, the motor current decays, circulating through the ground-clamp diode and sink transistor. The source driver’s OFF time (and therefore the magnitude of the current decrease) is determined by the monostable’s external RC timing components, where t

= RTCT within the range of 20 kΩ to

off

100 kΩ and 100 pF to 1000 pF.

), internal

S

) reaches the level

S

V

I

OUT

PHASE

PWM OUTPUT CURRENT WAVE FORM

+

0

–

I

TRIP

t

d

t

off

LOAD CURRENT PATHS

V

BB

Dwg. WM-003-1A

When the source driver is re-enabled, the winding current (the sense voltage) is again allowed to rise to the comparator’s threshold. This cycle repeats itself, maintaining the average motor winding current at the desired level.

Loads with high distributed capacitances may result in high turn-ON current peaks. This peak (appearing across RS) will attempt to trip the comparator, resulting in erroneous current control or high-frequency oscillations. An external RCCC time delay should be used to further delay the action of the comparator. Depending on load type, many applications will not require these external components (SENSE connected to E).

R

S

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

BRIDGE ON SOURCE OFF ALL OFF

Dwg. EP-006-1

LOGIC CONTROL OF OUTPUT CURRENT

2916

DUAL FULL-BRIDGE

MOTOR DRIVER

Two logic level inputs (l0 and I1) allow digital selection of the motor winding current at 100%, 67%, 33%, or 0% of the maximum level per the table. The 0% output current condition turns OFF all drivers in the bridge and can be used as an OUTPUT ENABLE function.

CURRENT-CONTROL TRUTH TABLE

l

0

LL V

HLV

LHV

HH 0

These logic level inputs greatly enhance the implementation of µP-controlled drive formats.

During half-step operations, the l0 and l motor at a constant torque between all positions in an eight-step

I

1

Output Current

/10 RS = I

REF

/15 RS = 2/3 I

REF

/30 RS = 1/3 I

REF

allow the µP to control the

1

TRIP

TYPICAL APPLICATION

STEPPER MOTOR

V

+

R

T

Dwg. EP-008B

BB

FROM

R

V

1

R

S

C

µP

V

REF

T

2

3

R

C

10

11

C

T

2

4

5

6

7

8

9

θ

2

PWM 2

BB

1

PWM 1

24

R

23

22

21

20

19

18

17

16

θ

1

15

14

1312

V

CC

S

R

C

FROM µP

V

REF

C

+5 V

T

sequence. This is accomplished by digitally selecting 100% drive current when only one phase is ON and 67% drive current when two phases are ON. Logic highs on both l0 and l turn OFF all drivers to allow rapid current

1

decay when switching phases. This helps to ensure proper motor operation at high step rates.

The logic control inputs can also be used to select a reduced current level (and reduced power dissipation) for ‘hold’ conditions and/or increased current (and available torque) for start-up conditions.

GENERAL

The PHASE input to each bridge determines the direction motor winding current flows. An internally generated deadtime (approximately 2 µs) prevents crossover currents that can occur when switching the PHASE input.

All four drivers in the bridge output can be turned OFF between steps (l resulting in a fast current decay through the

0

= l

≥ 2.4 V)

1

internal output clamp and flyback diodes. The fast current decay is desirable in half-step and high-speed applications. The PHASE, l0,and I inputs float high.

Varying the reference voltage (V provides continuous control of the peak load

REF

)

current for micro-stepping applications.

Thermal protection circuitry turns OFF all drivers when the junction temperature reaches +170°C. It is only intended to protect the device from failures due to excessive junction temperature and should not imply that output short circuits are permitted. The output drivers are re-enabled when the junction temperature cools to +145°C.

The UDN2916B/EB/LB output drivers are optimized for low output saturation voltages—less than 1.8 V total (source plus sink) at 500 mA. Under normal operating conditions, when combined with the excellent thermal properties of the batwing package design, this allows continuous operation of both bridges simultaneously at 500 mA.

1

2916

DUAL FULL-BRIDGE MOTOR DRIVER

24

0.280

0.240

NOTE 1

UDN2916B

Dimensions in Inches

(controlling dimensions)

13

0.014

0.008

0.300

BSC

0.430

MAX

0.210

MAX

7.11

6.10

0.015

MIN

16

0.070

0.045

0.022

0.014

24

1

1.77

1.15

7

NOTE 1

67

0.100

1.280

1.230

BSC

Dimensions in Millimeters

(for reference only)

2.54

32.51

31.24

BSC

13

12

0.005

0.150

0.115

0.13

MIN

0.355

0.204

Dwg. MA-001-25A in

10.92

MAX

7.62

BSC

5.33

MAX

0.39

MIN

0.558

0.356

NOTES:1. Webbed lead frame. Leads 6, 7, 18, and 19 are internally one piece.

2. Lead thickness is measured at seating plane or below.

3. Lead spacing tolerance is non-cumulative.

4. Exact body and lead configuration at vendor’s option within limits shown.

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

3.81

2.93

Dwg. MA-001-25A mm

UDN2916EB

Dimensions in Inches

(controlling dimensions)

28

2916

DUAL FULL-BRIDGE

MOTOR DRIVER

18

0.319

0.291

0.319

0.291

8.10

7.39

8.10

7.39

0.021

0.013

0.050

BSC

0.533

0.331

1.27

BSC

0.020

MIN

0.180

0.165

29

0.032

0.026

0.695

0.685

0.656

0.650

39

40

Dimensions in Millimeters

(for reference only)

28

29

0.812

0.661

17.65

17.40

16.662

16.510

0.656

0.650

144

0.695

0.685

INDEX AREA

2

INDEX AREA

17

7

6

Dwg. MA-005-44A in

18

17

0.51

MIN

4.57

4.20

39

144

17.65

17.40

2

6

40

16.662

16.510

7

Dwg. MA-005-44A mm

NOTES:1. MO-047AC except for terminal shoulder height. Intended to meet new JEDEC Standard when that is approved.

2. Webbed lead frame. Leads 7-17 and 29-39 are internally one piece.

3. Lead spacing tolerance is non-cumulative.

4. Exact body and lead configuration at vendor’s option within limits shown.

2916

°

DUAL FULL-BRIDGE MOTOR DRIVER

UDN2916LB

Dimensions in Inches

(for reference only)

24 13

0.0125

0.0091

0.2992

0.2914

0.020

0.013

0.0926

0.1043

7.60

7.40

1 2

3

0.6141

0.5985

0.0040

MIN

.

Dimensions in Millimeters

(controlling dimensions)

24 13

0.050

BSC

NOTE 1 NOTE 3

0.491

0.394

0.050

0.016

0° TO 8

Dwg. MA-008-25 in

0.32

0.23

10.65

10.00

1.27

0.40

1 2

0.51

0.33

2.65

2.35

0.10 MIN

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.

3

15.60

15.20

.

1.27

BSC

NOTE 1 NOTE 3

0° TO 8

Dwg. MA-008-25A mm

NOTES:1. Webbed lead frame. Leads indicated are internally one piece.

2. Lead spacing tolerance is non-cumulative.

3. Exact body and lead configuration at vendor’s option within limits shown.

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000