Electrical specifications

L6375S

10/17

2.9

Diagnostic logic

The operating conditions of the device are permanently monitored and the following

occurrences are signalled via the DIAG1/DIAG2 open-drain output pins see diagnostic Truth

Table.

●

Short Circuit versus ground.

●

Short Circuit versus VS.

●

Under Voltage (UV)

●

Over Temperature (OVT)

●

Open Load, if the output current is less than 3mA (typical value).

2.10

Demagnetization of inductive loads

An internal zener diode, limiting the voltage across the Power MOS to between 50 and 60V

(Vcl), provides safe and fast demagnetization of inductive loads without external clamping

devices. The maximum energy that can be absorbed from an inductive load is specified as

2.11

Diagnostic truth table

Table 6.

Diagnostic truth table

Diagnostic conditions

Input

Output

Diag1

Diag2

Normal Operation

L

H

L

H

H

H

H

H

L

H

L

H

H

L

H

H

L

H

H

H

L

L

H

H

(1)

(pin ON-DELAY grounded)

1.

A cold lamp filament, or a capacitive load may activate the current limiting circuit of the IPS, when the IPS

is initially turned on.

H

L

X

L

H

H

H

H

Output DMOS Open

L

H

L

L

H

L

H

H

Overtemperature

L

H

L

L

H

H

L

L

L

H

L

L

L

L

L

L