Other Parts Discussed in Thread: TPS54200, TPS92200
Hi,
I'm using the duty cycle approximation equation on page 11 of the datasheet (Vout/(Efficiency*Vin)).
However, I'm finding with my chosen values that the duty cycle is larger than 1. My parameters are Vout=10.5V, efficiency=0.9, Vin=11.5V. Does this mean the TPS92641 is not a suitable choice for this small step down?
If so, can you recommend an alternate part? I'm looking for something with analogue and potentially shunt dimming options. I have a single LED chain that requires 250mA.
Many thanks