TLE9261-3QX Datasheet, PDF (114/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

VCC1
VCC1,OV
TLE9261-3QX
Supervision Functions
t
t_{OV _filt}
RO
t_RD1
SBC Normal
SBC Restart
Figure 53 VCC1 Over Voltage Timing Diagram
t
SBC Normal
14.7
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, WKx.
• The same behavior applies, if V_CC1 falls below V_RTx for more 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.
14.8
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 undvervoltage 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.
Data Sheet
114
Rev. 1.1, 2014-09-26