Positive Switching Regulators

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pre65
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#1 Positive Switching Regulators

Post by pre65 »

What is a "positive switching regulator" ?

I saw these on Ebay and thought about 300b filamemts.

http://www.ebay.co.uk/itm/Positive-Swit ... 566c31899a
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pre65
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#2

Post by pre65 »

The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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jack
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#3

Post by jack »

Looks like a rather old-style buck converter - that is an SMPS that drops the voltage from the input voltage to a specified output voltage - vastly more efficient than a linear voltage regulator.

First units look very old. Second ones much better but not mains isolated by the looks of it.
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Mike H
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#4

Post by Mike H »

Second one has 5 - 32V input, not mains. :D

Might be AC too, if the large black chip is a bridge rectifier.
 
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Dave the bass
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#5

Post by Dave the bass »

'Non-synchronous Rectifier' the spec says so AC supply maybe?

Possibly 30mV of 300Khz on the filament though looking at the spec?
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