TLE 5207

Semiconductor Group

4

1998-02-01

Protective Function

Various errors like short-circuit to +

V

result in turn-OFF of the output stages after a delay of 40

µs and setting of the error flag

EF to ground. Changing the inputs resets the error flag.

Output Shorted to Ground Detection

If a high side transistor is switched on and its output is shorted to ground, the output

current is limited to typ 11 A. After a delay of 40

µs all outputs will be switched off and

the error flag EF is set to ground.

Output Shorted to +

V

An internal circuit detects if the current through the low side transistor is higher than 4 A

typ. In this case all outputs are turned-OFF after 40

µs and the error flag is set to ground.

At a junction temperature higher than 160

°C the thermal shutdown turns-OFF, all four

output stages commonly and the error flag is set without a delay.

Diagnosis

Input

Output

Diagnosis

EF

I1

I2

Q1

Q2

Shorted to GND

Shorted to

V

S

Overload

L

L

Z

Z

Q1, Q2

Q1, Q2

–H

L

H

L

H

Q2

Q1

X

L

H

L

H

L

Q1

Q2

X

L

H

H

H

H

Q1, Q2

–

–

L