FSP Hydro PTM X Pro 1000W Report (Page 3 of 4)

Page 3 - Physical Look - Inside

As always, we opened up our FSP Hydro PTM X Pro 1000W power supply to take a detailed look at what is going on inside. Please note that doing this at home may void your 10-year warranty, thanks to the warranty seal FSP applied over one of the attachment screws. For your benefit, we cracked ours open, so you do not need to. There are no user serviceable parts inside.

Opening the FSP Hydro PTM X Pro 1000W is quite straightforward with the removal of four screws. Taking out the internal components from the enclosure requires the removal of seven more. Our photo above shows an overhead view of its internal components. Its OEM is, unsurprisingly, FSP themselves. One highlight of the FSP Hydro PTM X Pro is the inside has a conformal coating against dust, stains, and humidity for reliable operation harsh environments. It features an LLC half bridge topology with DC-to-DC converters. At first glance, the build quality appears to be excellent. There are three main heatsinks inside, all painted black, and almost no wires.

Pulling the enclosure apart and we got straight to the internal inspection. The transient filter stage is the first input stage of a computer power supply, so we will take a look at that first. FSP has always done a great job in the past to make sure their power supplies met or exceeded the recommended requirements, and the Hydro PTM X Pro 1000W is no exception. The FSP Hydro PTM X Pro 1000W has one metal oxide varistor, two metalized polyester X-capacitors, five ceramic Y-capacitors, and two common mode chokes. This is two times the amount of X capacitors and two-and-a-half times the amount of Y capacitors than recommended. Considering some PSUs have missing MOVs, I am happy to see it here as this component is used to stabilize spikes from the AC line.

The active PFC circuit featured on the FSP Hydro PTM X Pro 1000W uses two HY Electronic GBJ2506P glass passivated bridge rectifiers on both sides of the black heatsink closest to the transient filter stage. At 115V, the maximum rectified forward current capacity with heatsink is 25A each, so you can theoretically pull up to 5750W (25A * 2 diodes * 115V) from the bridge rectifier at 100% efficiency. Of course, this is limited by the fact that it is not 100% efficient and also neglects the fact that not every component in the system is able to keep up.

Further down the line, on the outside of the largest heatsink, we can see two Infineon IPA60R125CP power transistors. Each is certified for up to 16A at 100c. These transistors present a maximum resistance of 125 mΩ and typical resistance of 110 mΩ when turned on according to the manufacturer's data sheet. This on characteristic is called Static Drain-Source On-Resistance, or commonly abbreviated as RDS(on). The more efficient the component is, the lower the RDS(on) value, since it wastes less power with lower resistance. One STMicroelectronics STPSC8H065 boost diode is adjacent. Two STMicroelectronics STP35N60DM2 MOFSETs, located on the smaller heatsink facing the inside of the bulk capacitors, are used as the main switchers on the Hydro PTM X Pro 1000W power supply. Each is certified for up to 17A at 100c, maximum resistance of 110 mΩ, and typical resistance of 94 mΩ.

On the primary side, we can see two Japanese brand Nippon Chemi-Con capacitors. 100% Japanese brand capacitors are specified on the marketing material, so this is to be expected. Our 1000W version of FSP's Hydro PTM X Pro series power supply incorporates two capacitors, both 470µF x 450V, in parallel for a total of 940µF capacitance. They are rated at 105c, whereas more value-oriented power supplies usually use 85c rated capacitors.

A Diodes Incorporated AP6503 synchronous DC/DC buck converter can be found on the middle add-in board closest to the bridge rectifiers.

On the secondary side, we can see more Nippon Chemi-Con and Rubycon capacitors rated at 105c. All rectifiers produce the +12V out, while the +5V and +3.3V outputs are generated from the +12V output using a DC-to-DC converter within as with modern high efficiency power supplies. Six Toshiba TPH1R306PL power MOSFETs are responsible for generating the +12V output, located on the third vertical PCB, just behind the one in front in the above photo and the blank shielding PCB behind it. The TPH1R306PL's rated continuous drain current is 100A at 25c. It has an RDS(on) value of 1.34 mΩ maximum and 1.0 mΩ typical at 25c.

Six Infineon BSC0901NS MOSFETs are responsible for generating the +5V and +3.3V outputs, located on the front vertical board in the above photo. The BSC0901NS's rated continuous drain current is 94A at 100c. It has an RDS(on) value of 1.9 mΩ maximum and 1.6 mΩ typical. An uPI Semiconductor uP3861P dual channel synchronous rectified buck controller and Weltrend WT7527RA monitoring IC for over/under current and over/under voltage protection can be seen on the same board as well.

There are few components of interest at the bottom of the PCB. Here, we can spot a Champion CM6901T2X SLS, SRC/LLC + SR resonant controller and a Novosense NSi6602 dual channel gate driver IC. The datasheets for all components mentioned in this review can be found on their respective manufacturer's websites.

At the back, we have a large daughterboard covering the entire rear panel for the modular cable sockets. All connection points are soldered directly to the add-on PCB after the secondary stage to reduce power transmission loss compared to having wires. The output connector configuration can be seen on the previous page. Overall, the internal build quality of FSP's Hydro PTM X Pro 1000W is excellent. Components are arranged very well for optimal cooling with practically no wires running around inside, and solder points on its black PCB is quite clean in general. I would say the FSP Hydro PTM X Pro 1000W is generally very good with regards to the selection of components used under the hood, appropriate for its performance class.

Lastly, we see a 120mm fan that provides cooling to the FSP Hydro PTM X Pro 1000W's internal components. It is connected to an add-in board with an Anpec APW9010 fan controller using a 2-pin connector. A 120mm fan is rather small nowadays for a power supply with a bottom mounted fan, but this is the largest one can fit into such a tiny enclosure. If not a lot of heat is being generated, noise will be kept to a minimum.

The fan model is Protechnic Electric MGA12012XF-O25, as shown in our photo above. The MGA12012XF-O25 is a fluid dynamic bearing fan specified at 0.52A for a maximum speed of 2700 RPM, 96.20 CFM air flow, 5.51 mmH2O air pressure, and 40.6 dB of noise. The fan is not supposed to activate until the PSU is loaded to approximately 300W with semi-fanless mode active. As such, it should remain off for the most part, and even when it is on, the fan speed will vary with load. Fans with fluid dynamic bearings generally have much longer lifespans compared to sleeve bearing fans and are quite suitable for this application.

Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion