As an interface between low-level logic and solenoids, dc (brush)

motors, or stepper motors, the UDN2998W dual full-bridge driver will

operate inductive loads up to 50 V with continuous output currents of

up to 2 A per bridge or peak (start-up) currents to 3 A. The control

inputs are compatible with TTL, DTL, and 5 V CMOS logic. Except

for a common supply voltage and thermal shutdown, the two drivers in

each package are completely independent.

For external PWM control, an Output Enable for each bridge

circuit is provided and the sink driver emitters are pinned out for

connection to external current-sensing resistors. The chopper drive

mode is characterized by low power dissipation levels and maximum

efficiency. A PHASE input to each bridge determines load-current

direction.

Extensive circuit protection is provided on-chip. Both ground-

clamp and flyback diodes for each bridge are provided. A thermal

shutdown circuit disables the load drive if chip temperature rating

(package power dissipation) is exceeded. Internally-generated delays

provide crossover-current protection.

The UDN2998W is packaged in a 12-pin single in-line power-tab

package for high power capabilities. Driving either of the bridges at

the full 2 A dc rating requires the use of an external heat sink. The tab

is at ground potential and needs no insulation.

FEATURES

I

±3 A Peak Output Current

DUAL FULL-BRIDGE

MOTOR DRIVER

Always order by complete part number:

UDN2998W .

Dwg. No. W-106

2998

ABSOLUTE MAXIMUM RATINGS

at T

+150

(peak) ...........................................

Logic Input Voltage Range,

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

NOTE: Output current rating may be limited

by chopping frequency, ambient tempera-

ture, air flow, or heat sinking. Under any set

of conditions, do not exceed the specified

current rating or a junction temperature of

+150

°C.