Disassembly
This power supply’s input filtering starts at a PCB attached to the AC inlet, with two X capacitors, a common-mode choke and two Y capacitors. The main PCB contains three X caps, one common-mode choke, four Y caps on the AC side (with a fifth after the rectifier) and one MOV. The total component count is five X caps, two common-mode chokes, seven Y caps and one MOV – which is plenty of components. The PFC section uses a 390µF Capacitor supplied by Teapo and an Infineon IPW50R140CP MOSFET, which is rated for 23A at 25°C and 15A at 100°C, with an RDS(on) of 0.14Ω. It is controlled by an Infineon ICE2PCS01G PFC controller IC. The two switching transistors are IXYS IXTQ22N50P MOSFETs rated at 22A at 25°C (although IXYS doesn’t specify what they can handle at higher temperatures) with an RDS(on) of 0.27Ω. They are driven by a Champion Micro CM6901 LLC Resonant controller.
All of the capacitors – both polymer and traditional electrolytic – are Teapo, which is a second tier Taiwanese brand. While there are certainly worse parts out there, it would have been better to use Japanese parts, at least for the 5Vsb rail and for the capacitors which are buried in the wires.
Like in most if not all 80 Plus Gold power supplies, the 12V rail uses synchronous rectification. The parts used are four International Rectifier IRFB7440 MOSFETs, which are rated for 172A at 25°C and 122A at 100°C, with an RDS(on) of 2.5mΩ. The 5V and 3.3V rails use DC-DC conversion from the 12V rail. The VRMs use two Infineon IPD031N03L MOSFETS. They are rated for 90A at case temperatures up to 105°C, and 3.1mΩ RDS(on). They are controlled by an Anpec APW7073 Buck Controller IC. The main secondary supervisor IC is a Grenergy GR8313. The only protections it supports are Over and Under Voltage Protections.
I made the mistake of not getting photos of the soldering until after I had de-soldered the key components, but suffice it to say that I didn’t spot anything worth complaining about. The joints all have an appropriate amount of solder, and the component pins are all cut to appropriate lengths.
The fan is a dual ball bearing part supplied by Globe Fan. This model has maximum speed, airflow and noise ratings of 2000RPM, 67.28CFM and 34dBA respectively. It didn’t become audible until about 300W load. Even when overloaded, it was never disturbingly loud. The heatsinks are fairly thick and have plenty of surface to air contact, especially for an 80 Plus Gold certified product.
Loading ...