BTS54040-LBF_15 Datasheet, PDF (40/67 Pages) Infineon Technologies AG – SPI Power Controller

BTS54040-LBF
Diagnosis
8
Diagnosis
For diagnosis purpose, the BTS54040-LBF provides a current sense signal at pin IS and a diagnosis word via SPI.
There is a current sense multiplexer implemented that is controlled via SPI. The sense signal can also be disabled
by SPI command. A switch bypass monitor allows to detect a short circuit between the output pin and the battery
voltage.
Please refer to Figure 21 for details.
VS
I_{IS 0}
load
current
sense
latch
gate
control
OR
latch
temperature
sensor
T
load current
limitation
ERR1
channel 1
DCR.MUX
current sense multiplexer
V_S
V _{DS(SB )}
DCR.
SBM
OUT4
OUT3
OUT2
OUT1
IS
R_IS
Figure 21 Block Diagram: Diagnosis
For diagnosis feedback at different operation modes, please see Table 9.
Diagnosis_4ch.emf
Data Sheet
40
Rev. 2.1, 2014-12-05