TLE4224-2 Datasheet, PDF (5/8 Pages) Siemens Semiconductor Group – Smart Low-Side Switch

Preliminary data sheet TLE 4224-2/S2
Protective Circuits
An integrated diode protects the device against reverse polarity of the operating voltage.
The load circuit withstands reverse poling within the limits of the maximum ratings (no shorted load
permissible at the same time).
The outputs are protected against current overload and thermal overload.
Error Detection
The status output signals the switching state at normal operating conditions (LOW = off; HIGH = on)
and in case of errors. The outputs are set according to the diagnostic table below.
If current overload occurs, the error condition is stored into an internal register and the output is shut-
down. To reset the register, the control input of the corresponding channel has to be switched off and
then on again.
Open load is detected in on- and off-modus: In on-modus the load current is monitored , in the off-
modus the ouput voltage is monitored.
The open load voltage threshold is programmable via the voltage supplied to the VC.
The state of the error detection circuit is directly dependent on the input status.
Diagnostic Table
Operating Condition
Normal Operation
Thermal Overload
Open Load or
shorted load to ground
Overload or
shorted load to supply
Enable
Input
ENA
L
L
H
H
X
X
L
L
H
H
L
L
H
H
Control
Input
IN
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L = LOW
H = HIGH X = RANDOM
Power
Output
OUT
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
Status
Output
ST
L
L
L
H
H
L
H
H
H
L
L
L
L
L
Semiconductor Group
Page ₅
20.12.96