CWT 750VH 750 W Power Supply Review

[Hardware Secrets Team]

There has been a new article posted.

Title: CWT 750VH 750 W Power Supply Review
URL: http://www.hardwaresecrets.com/article/635

Here is a snippet:
"CWT is the manufacturer behind several well known power supply brands, in particular Corsair and Thermaltake. Today we are going to do an in-depth test with their CWT-750VH model, which is a 750 W uni..."

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Hardware Secrets Team
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[Travis]

STPS6045CW provides 30A per diode so two rectifiers in parralel provides 60A(continuous) only. 60L45 has lower forward voltage drop(lower by ~0.1V), thus having a better efficiency(on secondary stage) and less conduction loss. With higher Tj you have higher efficiency(lower forward voltage drop) but shorter lifespan of diodes.

[Merman]

So what does per device mean???

This power supply has active PFC, so it can’t be sold in Europe, and because of that it also features auto voltage selection. CWT says this unit has 80% minimum efficiency. Of course we will measure efficiency during our tests.

From page 1

Editing error???

[clete purcel]

Does anyone know of a retail or online store in the USA who sells CWT PSU's ?

[Gabriel Torres]

Originally Posted by Merman

So what does per device mean???

Each Schottky rectifier has two diodes inside. The term "device" is used to clarify that we are talking about a component that has two diodes, not only one. For a better explanation download and read the datasheet from any Schottky rectifier, the links are in the review.

Editing error???

Fixed, thank you.

[Gabriel Torres]

Originally Posted by clete purcel

Does anyone know of a retail or online store in the USA who sells CWT PSU's ?

They aren't sold in the USA. In the US you can find several power supplies based on this one, including Corsair TX750W and Thermaltake Toughpower 750 W, as mentioned in the review.

Gabriel.

[Gabriel Torres]

Originally Posted by Travis

STPS6045CW provides 30A per diode so two rectifiers in parralel provides 60A(continuous) only. 60L45 has lower forward voltage drop(lower by ~0.1V), thus having a better efficiency(on secondary stage) and less conduction loss. With higher Tj you have higher efficiency(lower forward voltage drop) but shorter lifespan of diodes.

Thanks Travis. I've finished studying this and I finally understand what you are talking about. Schottky rectifiers have a typical 0.5 V voltage drop and reducing it we reduce loss and thus increase efficiency.

Gabriel.