Problem with LT3999

Hi

Iam using the LT3999 in series with a push Pull Trafo from würth (750315371) to generate 12VDC isolated.

After a powerup, the first few seconds all works fine but then the output voltage begins to oscillate and as a result, the LT3999 is getting quite hot.

Do you have any ideas why this happens?

Maybe I should reduce the frequency (500 kHz)

In addition, i left the ILIM and RDC pins floating and UVLO and OVLO are disabled (connected to VIN, GND resp.)

 PDF

Thank you for the help

Best

Andy

Top Replies

Parents Reply Children
No Data