Applications Information

TLH9302 – 9

TLH9302 – 10

Enable B

Inputs

Motor Direction

Clockwise

H

Counterclockwise

Dynamic Braking

L

FIGURE 4 Bidirectional DC Motor Control

Enable B Input 3

Motor 1

Input 4

Motor 2

H

H

Dynamic Braking

H

Run

H

L

Run

L

Dynamic Braking

L

X

Coast to a Stop

X

Coast to a Stop

FIGURE 5 2-Motor Controller

(Using both High- and Low-Side Driver Modes)

TLH9302 – 11

FIGURE 6 Two-Phase Bipolar Stepper Motor Control Circuit

CLAMP DIODES

When driving inductive loads diodes are necessary to

clamp spikes at the LM18298 outputs Clamp diodes must

have a recovery time of 200 ns or better and a forward drop

of 12V or less at the rated load current Typical devices are

the MB346 (Microsemi Corp

Santa Ana CA) and the

V331X (Varo Semiconductor Inc Garland TX)

6