Other Parts Discussed in Thread: TPS922050
Tool/software:
I am looking to run a string of 2 IR LEDs with the TPS922051 at a low current from a battery source.
Battery life is very important for this application. Expected battery voltage range is 6-8.4V. LED voltage at this current is 3.66V.
I only need to run my LEDs at 20mA- is this chip suitable of such a low output current?
When I follow the design procedure, I get an inductor of around 870uH while the design example uses a 2A output current and calculated an inductor in the 33uH.
Is there a problem using such a large inductor? How will this effect efficiency and stability? Do my compensation components need to change as a result?
What is the minimum output current if the dimming is set to 0? What is the quiescent current?
