I have an LED driver design challenge and need some further information. I need around 22 watts for a large volume cost-sensitive room fan lighting design.
I've gone over the TPS92411 data sheet and EVM manuals, and if I look at the TPS92411EVM-001 reference design, it seems to me that if I simply doubled up on the number of Cree LEDs and connected each respective new string in parallel to the strings on the EVM board (in other words 8 for 8, 4 for 4, 2 for 2), that's about all I would need to double output power.
Is this a valid assumption? There is a note in the 110V analog-regulator 92411 modeling software that says basically "this design is good for about 25 watts". But I need some details about the right way to do this.
Thanks!
Adam Reed
Dendera Partners