TLE 5206-2
Overview
Data Sheet 6 Rev.1.1, 2007-07-31
1.7 Monitoring Functions
Undervoltage lockout (UVLO):
When
V
S
reaches the switch on voltage V
SON
the IC becomes active with a hysteresis.
All output transistors are switched off if the supply voltage
V
S
drops below the switch off
value
V
SOFF.
1.8 Protective Function
Various errors like short-circuit to +
V
S
, ground or across the load are detected. All faults
result in turn-OFF of the output stages after a delay of 50 µs and setting of the error flag
EF to ground. Changing the inputs resets the error flag.
a. Output Shorted to Ground Detection
If a high side transistor is switched on and its output is shorted to ground, the output
current is internally limited. After a delay of 50 µs all outputs will be switched-OFF and
the error flag is set.
b. Output Shorted to +
V
S
Detection
If a low side transistor is switched on and its output is shorted to the supply voltage,
the output current is internally limited. After a delay of 50 µs all outputs will be
switched-OFF and the error flag is set.
c. Overload Detection
An internal circuit detects if the current through the low side transistor exceeds the
trippoint
I
SDL
. In this case all outputs are turned off after 50 µs and the error flag is set.
d. Overtemperature Protection
At a junction temperature higher than 150 °C the thermal shutdown turns-OFF, all four
output stages commonly and the error flag is set with a delay.
