Semiconductor Group

5

1998-02-01

TLE 5203

Output Shorted to +

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 EF 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.

Open Load Detection

The output Q1 has a 10 k

Ω pull-up resistor and the output Q2 has a 10 kΩ pull-down

resistor. If E1 and E2 are high, all output power stages are turned-OFF. In case of no

load between Q1 and Q2 the output voltage Q1 is

V

be detected by two comparators and an error flag will be set after a delay time of 40

µs.

Changing the inputs resets the error flip flop.

Diagnosis

Input

Output

Diagnosis

EF

E1

E2

Q1

Q2

Shorted

to GND

Shorted

to

Overload

Open Load

L

L

H

L

Q1

Q2

X

–L

L

H

L

H

Q2

Q1

X

–

L

H

LLL–

Q1, Q2

–

–

L

H

H

Z

Z

–––X

L