UP1966E soldering and continous operation

Designing with GaN FETs and ICs
1

Hi, I am using UP`966e to drive 4 EPC2302 GaN devices which are connected in parallel. I am having two key problems:

  1. the soldering of the UP1966E (I am using the profile mentioned)
  2. Sometimes when UP1966E gets soldered and starts working, it works for a few minutes in continuous operatin and stops working again.

Please advice

2

Hello,
it does sound like you are having some assembly issues, but difficult to be certain without more details.
Have you discussed with your assembly house? Did you get X-ray and inspection reports from them to be sure the assembly process is correct?
By the way we have a reference design for motor drives using 4 EPC2302 in parallel like you, although it uses a different driver: EPC9186: 150 ARMS, wide input voltage 3-Phase BLDC Motor Drive Inverter | EPC (epc-co.com), depending on your application it might help you in the initial phases of your design.

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3

Hi @AbdulMuneeb,

Are you trying to hand solder them? I had similar troubles trying to get the LMG1205 to work reliably, which is of the same footprint as yours I think. The things I did that helped me a lot is using the soldermask defined pads, so there’s a bit more soldermask to prevent bridging and soldering with an RMA flux, instead of a simple no-clean one.

Best of luck

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