BTS5480SF Datasheet, PDF (37/59 Pages) Infineon Technologies AG – SPI Power Controller

SPOC - BTS5480SF
Diagnosis
8
Diagnosis
For diagnosis purpose, the SPOC - BTS5480SF provides a current sense signal at pin IS and the 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.
In OFF-state a current source is able to be switched on for a selected channel with the DCR.CSOL bit. This allows
open load / short circuit detection to V_BB in OFF-state. The current value can be configured to a low or a high value
by programming the bit IECR.CSL. Please refer to parameter I_L(OL) (8.5.15).
Note: Please note: All below stated parameters and functions are valid for the internal channels. The behavior of
the current sense of the two external channel is restricted to the behavior of the external drivers.
Please refer to Figure 16 for details on diagnosis function:
VBB
I
IS0
load
current
sense
latch
gate
control
OR
latch
temperature
sensor
T
over current
protection
CSOL
I_L(OL)
ERR0
channel 0
DCR.MUX
current sense multiplexer
V_BB
V_DS(SB)
DCR.
SBM
IS
R_IS
Figure 16 Block diagram: Diagnosis
OUT3
OUT2
OUT1
OUT0
Diagnosis_STD.emf
Data Sheet
37
Rev. 1.0, 2010-04-12