Contents
- 1First Look
- 1.1The Box
- 1.2The Power Supply
- 2Load Testing
- 2.1Test 1 (74.45W Load)
- 2.2Test 2 (160.84W Load)
- 2.3Test 3 (202.91W Load)
- 2.4Test 4 (257.17W Load)
- 2.5Test 5 (309.29W Load)
- 2.6Test 6 (364.36W Load)
- 2.7Test 7 (393.48W Load)
- 2.8Test 8 (449.22W Load)
- 2.9Test 9 (503.94W Load)
- 2.10Test 10 (562.58W Load)
- 2.11. Test 11 (613.25W Load)
- 2.12Test 12 (666.16W Load)
- 2.13Overload (806.64W Load)
- 3Disassembly
- 3.1
- 4Actual Specifications and Conclusions
Disassembly
The input filtering starts at the AC receptacle, with an X capacitor and two Y capacitors. The main PCB adds another X cap, four Y caps, three coils and an MOV, so the total component count is two X caps, six Y caps, three common-mode chokes, and an MOV – plenty of components. The PFC section uses two Infineon SPW35N60C3 MOSFETS rated at 35A drain current, and 0.1Ω RDS-on. The PFC capacitor is a beefy 560μF Primary capacitor from Nippon Chemi-con. The switching transistors are Toshiba TK20J60U MOSFETs rated at 20A each with an RDS-on of 0.165Ω. The part number on the primary side controller IC wasn’t readable, but it appears to be from Champion Micro – possibly the popular CM6800.
The secondary side uses a mix of electrolytic and polymer capacitors. The Electrolytic capacitors are all Japanese – supplied by Nippon Chemi-Con. The polymer caps are mostly from Enesol (a Korean company), but there are two Japanese Nichicon FPCAP parts there too.
The 12V rail uses synchronous rectification, where transistors are used as opposed to diodes. The parts used are International Rectifier IRFB3207 MOSFETs, which are rated at 180A each. Three of them are used on the output while the others are used for freewheeling. This is more than enough capacity for a 650W unit. The 5V and 3.3V rails use DC-DC conversion from the 12V rail. The VRMs use four Matsuki ME90N03, which are rated at 74A each with an RDS-on of 0.009Ω, with an Anpec APW7073 controller IC. The main secondary side controller IC is a Silicon Touch PS229. It supports Over Voltage and Under Voltage protections on up to two 12V rails, but only supports Over Current Protection on one.
The soldering quality is very good, which comes as a surprise, considering that this unit is made by CWT. My only small complaint is a couple of longish component pins.
The fan is 140mm ball bearing model made by Yen Sun Technology. Since this fan is a custom design for Thermaltake, they don’t publish the specs. It was fairly quiet until about 550W load, when it started to ramp up noticeably. The fan has no shroud around the blades, and there are small vents on the side of the casing around it. These are supposed to let additional air in, but it really did feel like air was actually coming out of them during the load testing. The heat sinks are very thick, but don’t have a lot of surface to air contact. At least this unit is efficient, so there’s not a lot of heat to dissipate.
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