2993

DUAL H-BRIDGE

MOTOR DRIVERS

DISCONTINUED

PRODUCT

—

FOR

REFERENCE

ONL

Y

B

1

2

3

4

5

6

7

8

PHASE

GROUND

GROUND

OUT

OUT

GROUND

GROUND

BB

V

LOGIC SUPPLY

LOAD SUPPLY

ENABLE

PHASE

V

EA

2A

1A

A

A

DD

V

9

10

11

12

13

14

15

16

UDN2993B

2993

Dwg. No. A-12,455

DUAL H-BRIDGE MOTOR DRIVERS

Cost-effective monolithic drive electronics for bipolar stepper and

dc (brush) servo motors to 30 V and 500 mA is very practical with the

UDN2993B and UDN2993LB. These dual full-bridge motion control

ICs integrate separate inputs, level shifting for upper power outputs,

control logic, integral inductive transient protection, and source (upper)

and sink (lower) drivers in an H-bridge configuration. The single-chip

power IC provides improved space utilization and reliability unmatched

by discrete component circuitry.

Excepting the power supply connections, the two H-bridges are

independent. An ENABLE input is provided for each bridge and

permits pulse-width modulation (PWM) through the use of external

circuitry. PWM drive techniques provide the benefits of reduced power

dissipation, improved motor performance (especially torque), and

positively affect system efficiency. Separate PHASE inputs for each

bridge determine the direction of current flow in the load. Additionally,

each pair of (sink) emitters are terminated to package connections.

This allows the use of current-sensing circuitry. Both devices

incorporate an intrinsic “dead time” to preclude high crossover

(or cross-conduction) currents during changes in direction (phase).

These devices are packaged in plastic DIPs (suffix B) or surface-

mountable wide-body SOICs (suffix LB) with copper lead frames for

optimum power dissipation without heat sinks. The lead configurations

allow automatic insertion, fit standard IC sockets or printed wiring

board layouts, and enable easy attachment of a heat sink for maximum

power-handling capability. The heat-sink tabs are at ground potential

and require no insulation.

Dual full-bridge drivers with peak current ratings of

±3 A are

supplied as the UDN2998W.

FEATURES

s

±600 mA Output Current

s Output Voltage to 30 V

s Crossover Current Protection

s TTL/NMOS/CMOS Compatible Inputs

s Low Input Current

s Internal Clamp Diodes

s Automotive Capable

ABSOLUTE MAXIMUM RATINGS

Sink Driver Emitter Voltage,

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

IMPORTANT: Load supply voltage must never be

applied without logic supply voltage present.

NOTE: Output current rating may be limited by

chopping frequency, ambient temperature,

airflow, and heat sinking. Under any set of

conditions, do not exceed the specified maximum

current and a junction temperature of +150

°C.

Always order by complete part number:

Part Number

Package

UDN2993B

16-Pin DIP

UDN2993LB

20-Lead Wide-Body SOIC