![smile :smoke](./images/smilies/s0234.gif)
OK... after the first repair - replacing ERA5 and BLF404 on the Driver board it worked perfect on a Bench test
![Wink ;)](./images/smilies/icon_e_wink.gif)
After on test for a while at 300>400W it got hot - now the max I can get out from it is about 40W
![Embarrassed :oops:](./images/smilies/icon_redface.gif)
After doing some measurements it looks like the BLF404 has blown again.
When I replaced it I did the best I could regarding the mounting and cooling recommendations.
![Crying or Very Sad :cry:](./images/smilies/icon_cry.gif)
I have one more but I recon that one will blow just the same as well.
I suspect that the problem is the cooling of the BLF404.
Question could I use another power MOS transistor mounted on a separate heatsink instead.
Any suggestions of what I could try ?
I am willing to experiment I can't make it worse
![smile :whistle](./images/smilies/whistle.gif)
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