TLE 4203

Semiconductor Group

4

1998-02-01

Application

In industrial and automotive electronics, power full-bridge DC motor drivers are mostly

used for bidirectional motor drives. The two TTL and CMOS-compatible control inputs

act on the output as follows:

V

Lower power unit conducting; upper power unit blocked.

V

Upper power unit conducting; lower power unit blocked.

The following examples illustrate the operation:

Status 1: Motor is slowed down

Status 2: Motor turns right

Status 3: Motor turns left

Status 4: Motor is slowed down

Status

Input 1

Input 2

Output 1

Output 2

1L

L

V

QL

V

QL

2L

H

V

QL

V

QH

3H

L

V

QH

V

QL

4H

H

V

QH

V

QH