Datasheet

BTS5045-2EKA
Diagnostic Functions
Data Sheet 32 Rev. 2.1, 2011-09-01
PROFET™+ 12V
Figure 25 Open Load Detection in OFF Electrical Equivalent Circuit
7.3.3.3 Open Load Diagnostic Timing
Figure 26 shows the timing during either Open Load in ON or OFF condition when the DEN pin is HIGH. Please
note that a delay
t
sIS(FAULT_OL_OFF)
has to be respected after the falling edge of the input, when applying an open
load in OFF diagnosis request, otherwise the diagnosis can be wrong.
Figure 26 SENSE Signal in Open Load Timing
OUT
V
S
S
OL
V
bat
V
OL(OFF)
I
leakage
I
IS(FAULT)
IS
I
LOFF
OL
comp.
Open Load in OFF.svg
R
OL
Z
GND
R
IS
R
leakage
GND
R
PD
V
IN
tV
OUT
t
I
IS
t
t
sIS(LC)
90% of I
IIS(FAULT)
static
t
sIS(FAULT_OL_OFF)
Error Settling Disabling Time.vsd
V
S
-V
OL(OFF)
R
DS(ON)
x I
L
I
OUT
Load is present Open load
shutdown with load
t