Hardware Secrets
Home | Audio | Case | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
Content
Articles
First Look
News
Reviews
Tutorials
Main Menu
About Us
Compare Prices
Datasheets
Dictionary
Download
Drivers
Forums
Gabriel's Blog
Links
Manufacturer Finder
Newsletter
On The Web
RSS Feed
Test Your Skills
Newsletter
Subscribe today!
Search




Recommended Book
Power Supply Cookbook (EDN Series for Design Engineers) (EDN Series for Design Engineers)
By Marty Brown
Newnes
Price: $77.30

Home » Power
Rocketfish 700 W Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: May 16, 2008
Page: 5 of 10
$ Check REAL-TIME pricing for OCZ600SXS 600-Watt Power Supply $
TigerDirect.com: $79.99 Dell: $70.99
Amazon: $87.99 CompUSA.com: $79.99

Secondary Analysis

This power supply uses one of the most unusual configurations we’ve ever seen on its secondary. We decided to draw a simplified schematics from the secondary so you can better understand the configuration used on this power supply. Read our Anatomy of Switching Power Supplies tutorial to compare the configuration used on this power supply with the configuration normally used. In the name of simplification we didn’t draw the controlling circuit of the MOSFET transistors and that is why we left their gates unconnected.

Rocketfish 700 W Power Supply
click to enlarge
Figure 11: Secondary from Rocketfish 700 W.

The +12 V output is produced by three Schottky rectifier packs. Two STPS30150CW are in charge of the direct rectification, while one STPS4045CW is in charge of the negative rectification. This is a very unusual design, as usually power supplies use the same number of diodes for the positive and for the negative rectification and also they are usually identical. Here we have four diodes for the positive rectification and two diodes for the negative rectification. Because of this asymmetrical it is not so easy to calculate the maximum theoretical power for the +12 V outputs.

The +5 V output is rectified thru an IRL7833 power MOSFET transistor. The +5 V and +3.3 V are interconnected using another two IRL7833 transistors. The +3.3 V output is rectified thru an SBL4040PT Schottky rectifier. Due to this hybrid configuration it is not so easy to calculate the maximum theoretical power for the +5 V and +3.3 V outputs.

Rocketfish 700 W Power Supply
click to enlarge
Figure 12: +12 V negative rectifier, transistor and +3.3 V rectifier.

Rocketfish 700 W Power Supply
click to enlarge
Figure 13: Transistors and +12 V rectifiers.

For the protection circuit instead of using a monitoring integrated circuit this power supply uses a discrete protection circuit, i.e. the manufacturer created their own protection circuit instead of using an off-the-shelf integrated circuit. For this circuit three quad-comparators integrated circuits (AS339) are used. These integrated circuits are located on a small printed circuit board located on the secondary. Because of the use of a customized circuit we couldn’t check exactly what protections this power supply really had (well, we could if we spent a lot of time analyzing this circuit). We could clearly see the over current protection (OCP) circuit, as we will explain on next page.

Rocketfish 700 W Power Supply
click to enlarge
Figure 14: Protection circuit.

All electrolytic capacitors are Taiwanese, Teapo, KSC, Fcon

The active PFC electrolytic capacitors are rated at 85º C (and manufactured by Teapo, a Taiwanese company), while the electrolytic capacitors from the secondary are rated at 105º C and coming from several vendors (Teapo, Fcon and KSC).

Pages (10): « 1 2 3 4 [5] 6 7 8 9 10 »
Print Version | Send to Friend | | Bookmark Article | Comments (3)

Related Content
  • Zalman ZM600-HP 600 W Power Supply Review
  • Huntkey Green Star 450 W Power Supply Review
  • Zalman ZM360B-APS Power Supply Review
  • SilverStone Strider ST50F 500 W Power Supply Review
  • Dynex 400 W Power Supply Review

  • Recommended Deals
    Pc Power and Cooling Pc Power & Cooling Silencer 610 Eps12v Power Supply (S61EPS)


    Amazon: $109.99 CompUSA.com: $119.99
    TigerDirect.com: $119.99 Newegg: $109.99
    Pc Power and Cooling Turbo Cool 860W Power Supply (PPCT860) 860-Watt


    Amazon: $227.99 Newegg.com: $269.99
    TigerDirect.com: $274.99 CompUSA.com: $274.99

    RSSLatest News
    Exceleram Launches Five New Memory Kits
    October 10, 2008 - 10:57 AM PST
    Kingston Launches 32 GB DataTraveler Flash Memory
    October 9, 2008 - 10:13 AM PST
    Gelid Launches Silent Spirit CPU Cooler
    October 8, 2008 - 11:18 AM PST
    Antec Skeleton Case
    October 7, 2008 - 10:42 AM PST
    Lexar Media Launches Crucial Ballistix Tracer DDR3-1333
    October 7, 2008 - 10:11 AM PST
    Elpida Develops 65-nm Memory Chips
    October 6, 2008 - 11:10 AM PST
    Transcend Launches T5 Flash Memory
    October 3, 2008 - 11:50 AM PST
    Thermaltake Announces BigTyp14 Pro CPU Cooler
    October 3, 2008 - 11:28 AM PST
    A-Data Announces Triple-Channel DDR3 kits for Core i7 Processors
    October 3, 2008 - 11:17 AM PST
    EVGA Launches nForce 790i SLI FTW Mainboard
    October 3, 2008 - 11:07 AM PST
    .:: More News ::.

    RSSLatest Content
    500 GB Hard Disk Drive Round-Up
    Anatomy of the Playstation 3
    AMD ATI Chips Comparison Table
    Bgears b-Envi Case Review
    Everything You Need to Know About Digital Cameras
    Kingwin Mach 1 ABT-700MA1S 700 W Power Supply Review
    Thermaltake V9 Case Review
    OCZ Dominatrix Gaming Mouse Review
    Rosewill Wind Ryder RZLS142-AP Case Review
    AeroCool AeroRacer Pro Case Review
    iPod Touch 2nd Generation Review
    Olympus SP-570UZ Digital Camera Review
    Zalman ZM600-HP 600 W Power Supply Review
    Tagan A+ Curbic Case Review
    Everything You Need to Know About The Motherboard Voltage Regulator Circuit

    Our Most Popular Articles
    Maximum CPU Temperature
    796,401 views
    nVidia Chips Comparison Table
    495,571 views
    AMD ATI Chips Comparison Table
    438,056 views
    ATI Radeon X1300 Pro Review
    421,007 views
    ATI Radeon X1600 XT Review
    415,045 views
    How to Find Out Your Motherboard Manufacturer and Model
    407,245 views
    Connecting Two PCs Using a USB-USB Cable
    365,307 views
    How To Correctly Apply Thermal Grease
    349,784 views
    Sempron vs. Athlon XP
    284,598 views
    Sempron 3400+ Review
    275,579 views

    Latest Threads in Our Forums
    500 GB Hard Disk Drive Round-Up
    by ley
    ATHLON x2 6000 or C2D E8400??
    by ianb
    Budget Gaming PC
    by AeroWB
    what mobo and PSU pls..
    by AeroWB
    is this an "ok!" build?
    by AeroWB
    may notebook just shutdowns! help..
    by trojancya
    computer lock ups!
    by trojancya
    IGP vs video card which one? im confused
    by trojancya
    Newly Built PC Powering Issues.
    by Smfl22
    Power Usage
    by jun_ph26
    .:: Visit Our Forums ::.


    © 2004-8, Hardware Secrets, LLC. All rights reserved.
    Advertising | Legal Information | Privacy Policy
    All times are Pacific Standard Time (PST, GMT -08:00)