Hi All,

I'm using a power which is from IPD(please find attached the data sheet for more info),where it can drive 5v, 9A of load .

But here the issue is i'm facing huge spikes at the output during both no load and full load condition .
i have used the LC(l=1.5uH,C=100uF) filter also at the output side even though spikes are coming at the output side please guide me with a suitable solution.

Please find the attached images of spikes for better understanding.

 

But here the issue is i'm facing huge spikes at the output during both no load and full load condition . i have used the LC(l=1.5uH,C=100uF) filter also at the output side even though spikes are coming at the output side please guide me with a suitable solution.

I think that 1.5 μH inductor may be a bit small, given the noise you're seeing. I'd try a 22 μH, 47 μH, or even 100 μH inductor instead, along with an RFI bead (or beads) and see if that improves the situation.

Also, while a 100 μF capacitor will do a good job of filtering low frequencies, it's going to have significant self-inductance which will make it ineffective at filtering high frequencies. I would put multiple capacitors in parallel with it, such as a 10 μF low-ESR electrolytic, a 1 μF ceramic, a 100 nF ceramic, and a 10 nF ceramic. Together, they will perform a lot better over a much wider frequency spectrum.