TLE7250_15 Datasheet, PDF (15/34 Pages) Infineon Technologies AG – High Speed CAN-Transceiver

TLE7250LE
TLE7250SJ
Fail Safe Functions
5.4
Overtemperature Protection
The TLE7250 has an integrated overtemperature detection to protect the TLE7250 against thermal overstress of
the transmitter. The overtemperature protection is active in normal-operating mode and disabled in power-save
mode and receive-only mode. In case of an overtemperature condition, the temperature sensor will disable the
transmitter (see Figure 1) while the transceiver remains in normal-operating mode.
After the device has cooled down the transmitter is activated again (see Figure 8). A hysteresis is implemented
within the temperature sensor.
T_{JSD (shut down temperature)}
cool down
T_J
˂T
CANH
CANL
switch-on transmitter
t
t
TxD
t
RxD
t
Figure 8 Overtemperature protection
5.5
Delay Time for Mode Change
The HS CAN transceiver TLE7250 changes the mode of operation within the time window t_Mode. Depending on the
selected mode of operation, the RxD output pin is set to logical “high” during the mode change.
In this case the RxD output does not reflect the status on the CANH and CANL input pins (see as an example
Figure 13 and Figure 14).
Data Sheet
15
Rev. 1.0, 2015-08-12