TLE7230R_05 Datasheet, PDF (11/14 Pages) Infineon Technologies AG – Smart Octal Low-Side Switch Low Quiescent Current< 10μA Overvoltage

Data Sheet TLE 7230R
SPI Diagnostics:
As soon as a fault occurs for longer than the fault filtering time, the fault information is latched into the
diagnosis register (the Fault pin will also change from high to low state). A new error on the same chan-
nel will overwrite the old error report. Serial data out pin (SO) is in high impedance state when CS is
high. If CS receives a LOW signal, all diagnosis bits can be shifted out serially. If the sent command is
valid the rising edge of CS will reset all diagnosis registers and restart the fault filtering time. In case of
an invalid command the device will ignore the data bits and the diagnosis register will not be reset at the
rising CS edge.
Figure 1: Two bits per channel diagnostic feedback
Diagnostic Serial Data Out SO
MSB
LSB
15
3
2
1
0
Ch.8
Ch.2
C h.1
HH
Normal function
HL
Overload, Shorted Load or Overtemperature
LH
Open Load (off)
LL
Short to GND
For Full Diagnosis there are two dedicated diagnostic bits per channel, as shown in Figure 1.
Normal function: The bit combination HH indicates that there is no fault condition, i.e. normal function.
Overload, Shorted Load or Overtemperature: HL is set if the current limitation becomes active, i.e.
in the event of an overload or short to supply event. Additionally, this bit combination is set in the event of
overtemperature of the corresponding channel.
Open load: LH is set if an open load is detected (in off state of the channel)
Short to GND: LL is set if a short to ground condition is detected (in off state)
Timing Figures
Figure 5: Power Outputs
VIN
VDS
t ON
80%
20%
V2.0
t
tOFF
t
Page 11
2005-10-05