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Class D Switching Power Amplifiers and Power D/A conversion

Hypex UcD Build Problem with Hum
Hypex UcD Build Problem with Hum
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Old 12th February 2017, 07:57 AM   #11
ds23man is offline ds23man  Netherlands
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Location: Hypex's doorstep
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Old 19th February 2017, 07:52 AM   #12
raelman is offline raelman  Spain
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Hello.

Will be the hypex UcD xxxLP OEM converter board a solution?
I don't know if those boards have input buffer, but should be.
Isn't that?

Btw, Doritos123, what kind of opamp did you used?
Maybe I will build something with those lp boards.
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Old 19th February 2017, 09:10 AM   #13
ds23man is offline ds23man  Netherlands
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Those boards are OEM only!
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Old 19th February 2017, 09:21 AM   #14
raelman is offline raelman  Spain
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I can buy oem
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Old 20th February 2017, 04:03 PM   #15
doritos123 is offline doritos123  Netherlands
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The converter board doesn't have input buffer.
And Hypex doesn't sell the OEM parts to consumers.

I now use the LM4562.

After fixing my RCA to XLR cable, the hum is now gone.
I am now in the process to build the input buffer with a nice PCB.
And finally (and hopefully) assembly the amp.

My target is a 6 channel amp in one chassis.
4x UcD250 with 4x LM4562 input buffer
2x UcD400
1x SMPS1200A400 (suppy all the UcDs)
1x SSR04 Super Regulator (supply the input buffer)

This is actually a big project for me to tackle. So might take some time.
But i keep learning from this forum.
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Old 9th February 2018, 06:19 PM   #16
kjb is offline kjb  Sweden
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Hello. Did you ever got to making a pcb for the input buffert?
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Linkwitz Lx521.4, Seas Mimir, ME2
Hypex Ucd250LP, Ucd400OEM, ESP P3A
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Old 12th February 2018, 06:40 AM   #17
Antana is offline Antana  Europe
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Quote:
Originally Posted by raelman View Post
Hello.
Will be the hypex UcD xxxLP OEM converter board a solution?
The UcDxxxLP converterboard is nothing more than a PCBA that makes the 16P header easily accessible for quick evaluation. It does not contain a buffer, only some LED's.

Since your are an OEM yourselves, I suggest you design your own input board, basically the OEM converter with opamp, possibly trigger input or whatever you want. If you wish, you can post your design here and request a review.
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