SBC TLE9471ES Overtemperature Condition

Announcements

From sunburn to sun earn – we’ve got the power! Watch our #poweringgreen videos now.

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
StarLordRoxx
Level 1
Level 1
First like received 5 likes given First reply posted

Hello,

In SBC TLE9471ES one note is present in data sheet which states that 

"The Diagnosis bits are not cleared automatically and have to be cleared via SPI once the overtemperature condition is not present anymore".

So, in this is it states that we cant send any command on SPI when there is any overtemperature condition occured.

And what happen if we send any SPI command to clear any flag like CAN_FAIL/TSD1 .

If we cant send any command while overtemperature is present then how can we know that the overtemperature condition is not present anymore.

Thanks in advance

0 Likes
1 Solution
AnilKumar
Moderator
Moderator
Moderator
First question asked 50 solutions authored 10 likes received

Hello,

Thank you for posting in Infineon Community.

When an overtemperature/thermal shutdown event occurs, SBC moves to Failsafe state where all regulators and SPI are turned off for a period of 1s (Refer to figure of Sec 5.1 State diagram) for the device to cool.

After 1s SBC automatically moves to Normal mode via Restart mode where all regulators and SPI are active again.
All thermal shutdown flags can be cleared in normal mode only.

SBC moving to Normal mode itself indicates that there is no overtemperature event at that moment.

Note: TSD2_SAFE bit also can be used to increase TSD2 waiting time after 16 consecutive TSD2 events.(Refer SEC 12.8.3)

Reach out to me if you have any further query

Thanks

Anil

View solution in original post

1 Reply
AnilKumar
Moderator
Moderator
Moderator
First question asked 50 solutions authored 10 likes received

Hello,

Thank you for posting in Infineon Community.

When an overtemperature/thermal shutdown event occurs, SBC moves to Failsafe state where all regulators and SPI are turned off for a period of 1s (Refer to figure of Sec 5.1 State diagram) for the device to cool.

After 1s SBC automatically moves to Normal mode via Restart mode where all regulators and SPI are active again.
All thermal shutdown flags can be cleared in normal mode only.

SBC moving to Normal mode itself indicates that there is no overtemperature event at that moment.

Note: TSD2_SAFE bit also can be used to increase TSD2 waiting time after 16 consecutive TSD2 events.(Refer SEC 12.8.3)

Reach out to me if you have any further query

Thanks

Anil