TLE 5205-2

Overview

Data Sheet

5

Rev. 1.1, 2007-07-31

1.5

Circuit Description

Input Circuit

The control inputs consist of TTL/CMOS-compatible schmitt-triggers with hysteresis.

Buffer amplifiers are driven by this stages.

Output Stages

The output stages consist of a DMOS H-bridge. Integrated circuits protect the outputs

against short-circuit to ground and to the supply voltage. Positive and negative voltage

spikes, which occur when switching inductive loads, are limited by integrated

freewheeling diodes.

A monitoring circuit for each output transistor detects whether the particular transitor is

active and in this case prevents the corresponding source transistor (sink transistor) from

conducting in sink operation (source operation). Therefore no crossover currents can

occur.

1.6

Input Logic Truth Table

Functional Truth Table

IN1

IN2

OUT1

OUT2

Comments

L

L

H

L

Motor turns clockwise

L

H

L

H

Motor turns counterclockwise

H

L

L

L

Brake; both low side transistors turned-ON

H

H

Z

Z

Open circuit detection

Notes for Output Stage

Symbol

Value

L

Low side transistor is turned-ON

High side transistor is turned-OFF

H

High side transistor is turned-ON

Low side transistor is turned-OFF

Z

High side transistor is turned-OFF

Low side transistor is turned-OFF