TLE7230R_09 Datasheet, PDF (11/15 Pages) Infineon Technologies AG – Smart Octal Low-Side Switch Features Low Quiescent Current< 10μA

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
channel 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 com-
mand 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
Ch.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 func-
tion.
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
tON
80%
20%
V3.4
t
tOFF
t
Page 11
2009-07-15