Part Number: TPS92515 Other Parts Discussed in Thread: PMP15022
I am adding a shunt fet option to the existing design basing it on PMP15022 project.
I am not quite sure if my implementation is correct. Would it be possible if anyone could confirm…
Hello Hazel,
Each of these parts have reference designs that have EMI or EMC testing done with those reference designs. They are easily found on the landing page, see below:
Specifically, the TPS92515 also has multiple reference designs that include…
Hello Koji,
Yes, it is necessary to connect it like fig 14. The point is to keep the inductor/FET current slewed up to the same average value as the LED current so that the LED response time is very fast. Connecting it to the diode would not work correctly…
Hello Brian,
The TPS92515 is a newer device and would be a smaller solution since it is integrated. As for the equations I would trust the newer datasheet, I am not sure of the accuracy of the older datasheet. The 515 also has an excel calculator available…
Hello Koji,
All of the documentation for shunt FET dimming for the TPS92515 will be at much lower frequencies than 40 MHz. The document link for PMP15022 shunt FET dimming was done at 30 KHz.
I would not trust WEBENCH at these frequencies. Just creating…
