Datasheet

Electrical specifications L6375S
10/17 Doc ID 12603 Rev 8
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 Ta bl e 6:
Diagnostic truth table.
● Short-circuit vs. ground
● Short-circuit vs. VS
● Undervoltage (UV)
● Overtemperature (OVT)
● Open load, if the output current is less than 3 mA (typical value).
2.10 Demagnetization of inductive loads
An internal Zener diode, limiting the voltage across the Power MOSFET to between 50 and
60 V (V
cl
), 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 200 mJ (at T
J
= 85 °C).
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
Open load condition (I
o
< I
old
)
L
H
L
H
H
L
H
H
Short to V
S
L
H
H
H
L
L
H
H
Short-circuit to ground (I
O
= I
sc
)
(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
Supply undervoltage (V
S
< V
sth2
)
L
H
L
L
L
L
L
L