TLE82453-3SA_15 Datasheet, PDF (42/71 Pages) Infineon Technologies AG – 3 Channel High-Side and Low-Side Linear Solenoid Driver IC

TLE82453-3SA
Diagnosis Functions
up current source must be initially enabled in order to detect the OLOFF fault. Once this fault is detected, the pull
up current source current can be disabled and the pull down current can be enabled by SPI in order to determine
if the fault is an open load or a short to battery.
The diagnostic currents used are weak, a wait time is needed before the OLOFF bit is read.
t_wait = (V_LSUP /2) * C_load/ |I_DIAGMIN|. I_DIAGMIN is the absolute value of the I_{DIAG_UPMax} or I_{DIAG_DNMin} depending on which
is selected.
V_LSUPx
IDI AG
LOG IC
OL O FFx
filter
+
-
VLSUPx
2
LOADx
CESD
Figure 23 OLSB Fault - Off State Block Diagram
Data Sheet
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42
Rev 1.0, 2015-03-27