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LNK302/304/306 AC to DC Miniature Circuit

Posted by: Praveen on

Hello, 

 

I've read through the LNK302/304/306 datasheet and also the AN37 Application note. 

I'm designing a system with AC230 input and 3V3 outpput which needs to be really small, from the circuits provided in datasheet I've found most of the components of smaller size. The only problem is the input capacitors of 400V. 

I'm not able to fnd 400V small size capacitors, so is there any application note or using different component the size can be reduced??

The pcb size I'm looking for is 35mmX15mm

 

Thank You

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Submitted by PI-LeoDavinci on 05/04/2017

Hi Praveen,

 

We suppose there's a smaller 400V cap equivalent but it will come with a higher price. Have you tried sourcing or researching on different vendors for smaller 400V cap? Do you have restrictions in component height? 

Submitted by Praveen on 05/05/2017

Hello, 

 

I've tried sourcing on mouser, element14 and digikey. 

Non polarized I'm getting in smaller size, not able to find polarized capacitors in small size.