TPS92310-23FB: Modifying the design for 4 Leds

Hi Robin, Could you help Furkan in this case

Hi Furkan,

For 12V output, this device is OK. As for PF, I suggest customer apply an EVM to have a bench test.

There is no LED board along with TPS92310EVM. But you can apply LP8866EVM in which there is an independent LED board.

Robin

Hi Yuting,

Thanks for supporting. We have a board design with 4 serial led load. We are thinking of driving this with TPS92310-23FB 230V Flyback LED Driver EVM board. What changes need to be made such as transformer and auxiliary components on the eval board? 

I also found the TPS92010EVM-631 design as a result of my research. Is this board provide our project requirements? (Vin=220VAC, Vout = 12VDC, PFC> 0.90, 6W> Pout) 

Our expert is on business trip, please wait for the reply.

Hi Yuting,

I tried two times directly this EVM board. But I couldn't get the results right. I wonder if the output of the transformer must be 12V to change the output voltage?

Hi Semih,

Could you explain more about "couldn't get the results right"?

Robin

Hi again Robin,

When 7 serial leds are connected to board, it works properly, but when 4 serial leds are connected, there is noise on the card and the leds don't light. (We are using different color led for each lamp.Red led Vled=2V, Yellow led Vled=3V, Green led Vled=3V)

Hi Robin, please help to follow this case.