This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM3409: Better layout, less heating

Part Number: LM3409


I am designing a laser driver that must be able to produce a current between 0.5 and 4 ampere. The first version is heating quite a lot, especially near the mosfet and the re-circulating diode.

I already did some improvement for the future version but I am wondering if someone could give me some tips to reduce the heating.  For example, will it help to reduce the frequency by increasing Roff ?

Thank you in advance