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Old 16th June 2012, 11:01 AM   #4451
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Quote:
Originally Posted by Jan-Peter View Post
Yes
Yes for the first question, and yes for the second question?
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Old 16th June 2012, 11:05 AM   #4452
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Yes, for more details about the SMPS180 check the datasheet; http://www.hypex.nl/docs/SMPS180_datasheet.pdf
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Old 16th June 2012, 11:06 AM   #4453
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Quote:
Originally Posted by Jan-Peter View Post
Yes, for more details about the SMPS180 check the datasheet; http://www.hypex.nl/docs/SMPS180_datasheet.pdf
Come on Jan Peter, I know you can do it....
Say "no" to my second question, and don't invite me to ask you to rewrite your datasheets....
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Old 16th June 2012, 11:24 AM   #4454
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Quote:
Originally Posted by pieter t View Post
Come on Jan Peter, I know you can do it....
Say "no" to my second question, and don't invite me to ask you to rewrite your datasheets....
You don't take a "yes" for an answer, do you?

Even if the answer to your second question would be a "no" it would still be a regulated power supply (apart from your own special extra-demanding definition of "regulated").

So here is a question to you: Does the SMPS, in your opinion, allow the voltage to vary as the load varies (as would happen if the power supply was unregulated)? And if your answer is "no", would you then agree that, even if it doesn't correspond to your narrow definition of "regulated", the SMPS is not unregulated?
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Old 16th June 2012, 11:30 AM   #4455
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Originally Posted by Julf View Post
You don't take a "yes" for an answer, do you?
No I don't, especially since it does not correlate with the datasheet.

SMPS180 datasheet General Performance Data
Unregulated Output Voltage Aux 2x14 - 2x18 Vdc; note 5.
note 5: This output voltage is proportional to mains outputs Vcc and Vee respectively.

Is my conclusion correct that this power supply taps an unregulated supply from a regulated supply?
Hmmm clever guys at Hypex....

Last edited by pieter t; 16th June 2012 at 11:43 AM.
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Old 16th June 2012, 11:33 AM   #4456
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Originally Posted by Julf View Post
Even if the answer to your second question would be a "no" it would still be a regulated power supply (apart from your own special extra-demanding definition of "regulated").
It is not my own special extra-demanding definition of "regulated".
You came up yourself with the right definition of regulation in a previous post
(...stable voltage....).
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Old 16th June 2012, 11:36 AM   #4457
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Quote:
Originally Posted by Julf View Post
So here is a question to you: Does the SMPS, in your opinion, allow the voltage to vary as the load varies (as would happen if the power supply was unregulated)? And if your answer is "no", would you then agree that, even if it doesn't correspond to your narrow definition of "regulated", the SMPS is not unregulated?
My answer is yes, because the supply is voltage unregulated.
With varying loads (current demands) voltage will be unstable, albeit within respectable margins (as good quality power supplies should do).
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Old 16th June 2012, 02:10 PM   #4458
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Quote:
Originally Posted by pieter t View Post
SMPS180 datasheet General Performance Data
Unregulated Output Voltage Aux 2x14 - 2x18 Vdc; note 5.
note 5: This output voltage is proportional to mains outputs Vcc and Vee respectively.
I am not familiar with the SMPS180 - I have been talking about the SMPS600 that is intended for the nCore, and that is what this thread is about. Do you have a link to the SMPS180 datasheet?

At least on the SMPS600, the Aux voltage is unregulated, while the main output voltage is regulated. I am assumin the SMPS180 is the same.[/QUOTE]
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Old 16th June 2012, 02:10 PM   #4459
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Default Sorry Julf...

But I am with Pieter on this. Clearly, in common usage by anyone who deals with audio equipment, the usage of the phrase "regulated power supply" means a supply which holds the voltage constant, while also providing all the current that the circuit demands, regardless of load/line conditions.
I do not know what the SMPS 180 has to do with a thread about nCore, but it is totally clear that the SMPS 600 is not a regulated power supply, as it does not hold the output voltage constant. I am not going to argue semantics any further than this.

As far as whether the SMPS 600 might have technical advantages over a traditional linear amplifier supply (transformer-rectifiers-caps) that is a different discussion, and will depend entirely on the design of the linear supply as well (transformer size, type of rectifiers, amount of capacitance, etc).

But calling the SMPS 600 a regulated supply is misleading.
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Old 16th June 2012, 02:18 PM   #4460
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Originally Posted by barrows View Post
Clearly, in common usage by anyone who deals with audio equipment, the usage of the phrase "regulated power supply" means a supply which holds the voltage constant, while also providing all the current that the circuit demands, regardless of load/line conditions.
Clearly, in common usage, an unregulated supply is one that has no active regulation. In contrast, a regulated supply is one with an active regulation system that maintains a constant voltage even if the load changes.

Quote:
I do not know what the SMPS 180 has to do with a thread about nCore, but it is totally clear that the SMPS 600 is not a regulated power supply, as it does not hold the output voltage constant.
I don't know what the SMPS180 has to do with any of this either, but it is totally clear that the SMPS600 is a regulated power supply.

Quote:
I am not going to argue semantics any further than this.
Good.

Quote:
But calling the SMPS 600 a regulated supply is misleading.
Not as misleading as calling it an unregulated supply, unless you want to play semantic jiu-jitsu and call it an unregulated supply that happens to supply a regulated voltage.
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