Other Parts Discussed in Thread: TPS92691
We are investigating using the TPS92691 in a buck-boost topology. The power supply that we are using to power the LEDs is 48 V. We need between 36.4 V and 52 V out. I will note that we are not connecting the VIN pin to 48 V. From experience, we use a small 10 V regulator for Vin. Here is a screenshot of the topology from the datasheet.
Since the cathode is at the same potential as the power supply, that must mean that the anode must be at a higher voltage. Thus, the anode could be as high as 100 V (referenced to ground). An extension of this is that Vds for Q1, Q3, and Q4 would also be very high.
Is using this chip for this application possible, or should we replace the power supply with a lower voltage power supply and run it in Boost configuration? What design parameters would I need to consider, given that the voltage is so high?
