Other Parts Discussed in Thread: TPS54160
I have an application (HVAC) where the power source is a 24VAC transformer. We have limited space and ran some preliminary tests to check what the input voltage would look like, please see attached document. We are going to regulate down to 3.3V and the maximum load will probably be ~500-600mA when connecting to WiFi and maybe ~100mA in other conditions. The current switcher design we have is this:
From the data we collected (using an electronic load) even at 470uF there is over 6Vpk-pk. We're hoping to use as little a size as possible for the electrolytic cap after the bridge so we can reduce the overall footprint.
AC Bridge Rectified Measurements.pdf
Is there any reference data on this or any helpful advice on what we "can get away with" in this design?
Thanks,
George