We are using LYT4227 IC for 50watt and 30watt street light led drivers.
However Power fluactions are normal in India. Our driver stop working after some of days. We have analyzed the driver and found that. Varistor and Fuse are blown in 9 out of 10 faulty driver. Other all parts are working well.
So we checked the competitors’ LED driver to check out what kind of technology they are using. And we have found that they using 385V varistor with 2A fuse. That’s why they are working good in worst power conditions.
So my question is that can I use 385V Varistor with 3A fuse with LYT4227 IC? Can LYT4227 IC handle the surge 385VAC ?
Let me know the possible the maximum voltage rating of Varistor.
I am using following components in 50W driver.
- 3.14 A Slow Blow Fuse (Series)
- 14mm 80J 300V Varistor
- 1.5M + 1.5M Resistors
- 305V 220nF X Cap
- 12mH Filter Chawk (U10)
- DB207S (2A 1000V Bridge Rectifier)
- 2 x 4.7uF 450V Capacitor for 10KV surge protection (With series of US1M & 470K)
- 220nF 400V DC Cap (105C)