Hello i am using a ACT4088US-T (datasheet here) Buck converter and i made it to run in constant current mode 500[mA] through a Diode (D5): Everything works fine. It draws 500mA no matter the load i attach to it and the Voltage at FB is 0.81V all the time.
What are other ways to reduce the noise At point A?
Reading the datasheet of ACT4088, i think i can decrease the noise by using a larger Inductor (L1). Maybe using a larger C1 would help? Would bootstraping the output with a diode (Page 8 of datasheet, D2 diode) would help?
(Just for the record i tried adding a large 3300uF Cap after the diode, it didnt help much)
Probe is x10 Oscilloscope settings are:
COUPLING: DC 1MΩ
V/div Offset: NORMAL
Probe attenuation: x1