Data Sheet
117
Rev. 1.00
2017-07-31
TLE9263BQXV33
Supervision Functions
that external noise could be coupled into the VCC1 supply line. Especially, in case the VCC1 output
current in SBC STOP Mode is below the active peak threshold (I
VCC1,Ipeak
).
Figure 53 VCC1 Overvoltage Timing Diagram
15.7
VCC1 Short Circuit and VCC3 Diagnostics
The short circuit protection feature for
V
CC1
is implemented as follows (VS needs to be higher than
V
S,UV
):
• If VCC1 is not above the V
RTx
within
t
VCC1,SC
after device power up or after waking from SBC Sleep Mode then
the SPI bit
VCC1_SC
bit is set, VCC1 is turned OFF, the FOx pins are enabled,
FAILURE
is set and SBC Fail-
Safe Mode is entered. The SBC can be activated again via wake on CAN, LINx, WKx.
• The same behavior applies, if
V
CC1
falls below V
RTx
for longer than
t
VCC1,SC
.
VCC3 diagnosis features are implemented as follows:
• Load Sharing: The external PNP is disabled when VS <
V
S,UV
if VCC3_VS_ UV_OFF = 0 or when in SBC Stop
Mode if
VCC3_LS_ STP_ON
= ‘0’. All other diagnostic features are disabled because they are provided via
VCC1.
•
Stand-alone configuration: The external PNP is disabled when VCC3 <
V
S,UV
if
VCC3_VS_ UV_OFF
= 0. The
overcurrent limitation is signalled via the bit
VCC3_OC
according to the selected shunt resistor, VCC3
undervoltage is signalled via the bit
VCC3_UV
and the regulator is disabled due to VS undervoltage when
V
S,UV
is reached.
Note:
Neither
VCC1_SC
nor
VCC3_UV
flags are set during power up of V
CC1
or turn on of V
CC3
respectively.
15.8
VCC2 Undervoltage and VCAN Undervoltage
An undervoltage warning is implemented for VCC2 and VCAN as follows:
•
V
CC2
undervoltage Detection: In case
V
CC2
will drop below the V
CC2,UV,f
threshold, then the SPI bit
VCC2_UV
is set and can be only cleared via SPI.
•
V
CAN
undervoltage Detection: In case the voltage on
V
CAN
will drop below the V
CAN_UV
threshold, then the SPI
bit
VCAN_UV
is set and can be only cleared via SPI.
Note:
The VCC2_UV flag is not set during turn-on or turn-off of V
CC2.
RO
t
VCC1
t
RD1
SBC Normal
t
t
VCC1,OV_F
SBC Restart
SBC Normal
V
CC1,OV
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from