LM5088: LM5088-Q2 BCI-EMC Test

Gokhan Sahin

Part Number: LM5088
Other Parts Discussed in Thread: TIDA-01429

Hi eveyone,

We're using LM5088-Q2 to supply a board used in automotive. While testing SMPS with LM5088-Q2 for BCI-11452, it fails to run and resets.

We'have tried a common choke and filters with ferrite beads and capacitors connected to supply voltage but it can't be passed the test. It fails around 50MHz.

However, the circuit passes the test when not mounted SPMS.

Is there any solution to pass BCI test for LM5088?

over 5 years ago

0 Andy Chen over 5 years ago

TI__Mastermind 34875 points

Hi Gokhan,

Can you upload your LM5088 application circuit for checking?

Do you test your SMPS with 75V input on steady state? will it work stably?

B R

Andy

0 Gokhan Sahin over 5 years ago in reply to Andy Chen

Prodigy 210 points

I can't test with 75V input due to having TVS but its stable for up to 36V.

0 Andy Chen over 5 years ago in reply to Gokhan Sahin

TI__Mastermind 34875 points

Hi Gokhan,

Pls remove the TVS and increase Vin to 70V to see if circuit operating stably.

Pls download TI reference design: TIDA-01429 which Passes ISO 11452-4 Bulk Current Injection. you can copy the input L/C filter design to your board.

B R

Andy

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LM5088: LM5088-Q2 BCI-EMC Test