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Class D Switching Power Amplifiers and Power D/A conversion

UcD400 & SMPS400/67 voltage mismatch?
UcD400 & SMPS400/67 voltage mismatch?
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Old 29th October 2009, 10:06 PM   #1
AIS is offline AIS
diyAudio Member
Join Date: Oct 2009
Default UcD400 & SMPS400/67 voltage mismatch?

What is it that I don’t understand??

The SMPS400/67 has a rated output of 2x67Vdc (nominal I presume). Think I read somewhere that it could actually reach 75V.

The input voltage for the UcD400 module is +/- 45-65V. OVP is actually set to 68V.

Somehow I get the feeling that these two puppies shouldn’t play all that well together… Obviously I’m wrong since the hypex homepage sais that the SMPS400/67 is for the UcD400 but could someone please explain why…
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Old 31st October 2009, 08:30 PM   #2
DavidT is offline DavidT  United States
diyAudio Member
Join Date: Sep 2005
Default New vs old power supply specs


Ran into this also with my new build. As I read the mfg info :

UCD 400 Original Spec:

Range 45 - 63 V
Max 65 V
Shut down 68 V

UCD 400 New Spec:

Range 45 - 67 V
Max 75 V
Shut down 30 & 75 V

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