Datasheet TLE 6228 G P

into an internal register and the output is shutdown. The reset is done by switching off the corresponding

Open load is detected for all four channels in on and off mode.

In the on mode the load current is monitored. If it drops below the specified threshold value IQU then an

open load condition is detected.

In the off mode, the output voltage is monitored. An open load condition is detected when the output

prevent an open load diagnosis in case of transient Voltages on the outputs the open load detection in

off mode uses a filter of typ. 50µs.

Status output at pulse width operation

If the input is operated with a pulsed signal, the status does not follow each single pulse of the input sig­

ms) enables a continuous status output signal. See the

timing diagrams on the following pages for further information.

This internal status delay simplifies diagnostic software for pwm applications.

Diagnostic Table

In general the status follows the input signal in normal operating conditions.

If any error is detected the status is inverted.

Standby

Enable

Control

Power

Status

Operating Condition

Input

Input

Input

Output

Output

STBY

ENA

IN

Q

ST

Standby

1)

L

X

X

off

H

Normal function

H

L

X

off

L

H

H

L

off

L

H

H

H

ON

H

Open load or short to ground

H

H

L

L

L

H

off

off

H

H

H

H

L

off

H

H

H

H

ON

L

Overload or short to supply

2)

H

H

H

off

L

reset latch

3)

H

H

H

fi L

off

L

H

L

X

off

L

Overtemperature

2)

H

H

H

off

L

reset latch

3)

H

H

H

fi L

off

L

H

L

X

off

L

V4.1

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2010-07-10