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 opti-

mized for a low output saturation voltage drop (less than 1.8 V

total source plus sink at 500 mA).

For PWM current control, the maximum output current is deter-

mined 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 44-lead

power PLCC for surface mount applications. The UDN2916LB is

supplied in a 24-lead surface-mountable SOIC. Their batwing construc-

tion provides for maximum package power dissipation in the smallest

possible construction. The UDN2916B/EB/LB are available for opera-

tion 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. The B and LB packages are available in a lead (Pb) free

version, with 100% matte tin leadframe.

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

UDN2916B-T

24-Pin DIP, Lead-free

UDN2916EB

44-Lead PLCC

UDN2916LB

24-Lead SOIC

UDN2916LB-T

24-Lead SOIC, Lead-free

1

2

3

4

5

6

7

8

9

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

θ

2

θ

1

V

CC

2

1

GR OUND

GR OUND

GR OUND

GR OUND

02

I

12

I

2

RC

1

RC

V

RE F 1

11

I

2B

OUT

2

E

2A

OUT

1A

OUT

1

E

1B

OUT

01

I

LOAD

S UPPLY

LOG IC

S UPPLY

Dwg. PP-005

ABSOLUTE MAXIMUM RATINGS

at T

Motor Supply Voltage, V

BB

.................... 45 V

Output Current, I

OUT

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

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

Logic Supply Voltage, V

CC

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

Logic Input Voltage Range,

V

IN

......................... -0.3 V to V

CC

+0.3 V

Output Emitter Voltage, V

E

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

Package Power Dissipation,

P

D

........................................................

See Graph

Operating Temperature Range,

T

A

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

Storage Temperature Range,

T

S

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

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.

2916