Hi there,
I learn that Binning resistor is required to set current for different LED bin to achieve equivalent brightness. I have some questions.
1.How does it achieve adjustment? The resistor is sensitive to light?
2.What's the advantage of Off-Board Bin resistor, when comparing with Bar/QR Code ?
Thanks!
Hi Elec,
Let me assume you are using the off-binning function of TPS92633-Q1.
1. Firstly, during application design, the output current is fixed in advance. So the off-binning resistor you are talking about R(ICRTL2) + R(ICRTL1) is fixed to set the regulation voltage. To better understand, I suggest referring to calculation tool https://www.ti.com/lit/zip/slvrbh1 . Choose the "(Off-board bin)" sheet.
2. As you can see, Bar/QR Code solution doesn't have an off-binning resistor on LED board, so it needs additional efforts to avoid false design. However, TPS92633-Q1 has an R(ICRTL2) on the LED board to set a corresponding output current with robust EMC immunity. So the corresponding process is much simplified during manufacturing.
Best, Gracie
