TLD2326EL_15 Datasheet, PDF (21/30 Pages) Infineon Technologies AG – 3 Channel High Side Current Source

V_{IN _SET}
VIN _SET( OL /SC)
V_{IN _SET (ref )}
V_{OU T}
VF
t_SC
t_{IN_SET( re set)}
TLD2326EL
Load Diagnosis
t
VOUT (SC)
t
short circuit
occurs
short circuit
disappears
Figure 14 IN_SET behavior during short circuit to GND condition with ST connected to GND and V_DEN >
V_DEN(act)
8.3
Double Fault Conditions
The TLD2326EL allows the diagnosis of each channel separately. The diagnosis filter times t_OL and t_SC (Pos. 8.4.5
and Pos. 8.4.8) are valid only for the channel, which diagnoses first the fault condition. For the other channel or
channels with a subsequential fault the diagnosis is reported immediately without the diagnosis filter time, if the
filter time t_OL has been elapsed for the channel with the first fault. During activation via IN_SET of a non-faulty
output, where one channel has already a fault detected, a short spike to V_{IN_SET(OL/SC)} could occur on the channel,
which should be activated. Therefore, in general a diagnosis should be done earliest after the diagnosis filter times
t_OL and t_SC to avoid any incorrect diagnosis readout. In the scenario mentioned above the turn on time t_{ON(IN_SET)}
could be extended. The following figure shows the example behavior, if OUT1 has a fault and OUT2 is operated
in PWM-mode. OUT3 is disabled.
Data Sheet
21
Rev. 1.1, 2015-03-24