foulmist
0
- Joined
- Mar 29, 2011
- Messages
- 1,056
- Points
- 48
I did some tests on the ben boost with 22uF caps. (real 22uF )
I tested the rectangular and the round board.
I made videos of the waveform cuz the screen of the Digital Scope is small and you cannot see the whole form in details without scrolling.
The first two videos are the startup and the ripple current with 1x probe on the rectangular board.
The 3rd video is ripple current on round board with contacts on the bottom. I forgot to take a video of the startup but it's similar to the rectangular (with some more oscillations)
The rectangular board is showing around 30mA of ripple current without oscillations which is pretty good with the 22uF Caps.
It has a little startup spike with some oscillations that could be a problem for the more sensitive laser diodes like the blurays.
The circle board is showing oscillations in the 50mA range which is bad. This might be a design flaw and oscillations on startup
I have set both to approximately 1.25A of output current.
I didn't have time to do more tests... you will have to excuse the TV noise. My gf was watching some comedy shows.
If any questions I will answer tomorrow cuz I am going to bed now good night folks :beer:
I tested the rectangular and the round board.
I made videos of the waveform cuz the screen of the Digital Scope is small and you cannot see the whole form in details without scrolling.
The first two videos are the startup and the ripple current with 1x probe on the rectangular board.
The 3rd video is ripple current on round board with contacts on the bottom. I forgot to take a video of the startup but it's similar to the rectangular (with some more oscillations)
The rectangular board is showing around 30mA of ripple current without oscillations which is pretty good with the 22uF Caps.
It has a little startup spike with some oscillations that could be a problem for the more sensitive laser diodes like the blurays.
The circle board is showing oscillations in the 50mA range which is bad. This might be a design flaw and oscillations on startup
I have set both to approximately 1.25A of output current.
I didn't have time to do more tests... you will have to excuse the TV noise. My gf was watching some comedy shows.
If any questions I will answer tomorrow cuz I am going to bed now good night folks :beer: