street light project

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Hi,

    We have a streetlight project 36W using LED. We plan to use our 36w non dimmable driver using LNK 419, same design as DER286. DER286 will with stand 2.5kv. We need 6kv minimum surge capacity for this street light project. Please suggest a surge protection circuit for 6kv as a separate board together with der286.

Thanks

SDM

Hi SDM,

 

there's a couple of things you can try right away, referring to DER-286 design, replace the RV1 and RV2 to 10mm 250VAC MOV and/or increase C5 to 100 uF. 

 

PI-Troi

Hi,

With respect to figure 4(Schematic of DER286) you can increase the surge immunity by increasing the capacitance of C14 to 47uF and increase the energy clamping capability of RV1 to 150 joules like V320LA40BP or equivalent.  Parallel a discharge resistor across D8 around 330k (1/2W).

Regards,

PI-Jono