FSP Announces 700W PS2 Redundant PSU With 80 Plus Gold Efficiency

Posted by at 10:31 am on June 24, 2016


During Computex 2016 we saw tht FSP’s redundant PSU line, called Twin Series. The strongest member of this line was the FSP600-70RGHBB1, but that has changed with the addition of the FSP700-70RGHBE1. All Twin Series models are server-grade units featuring a pair of hot-swap PSUs at their internals. The FSP700-70RGHBE1 uses a couple of 700W power supplies, which, thanks to their minimal footprint, achieve a high power density score of 22.4W/in3. According to FSP this is the highest power density score currently available in a standard PS/2 (redundant) form factor compatible unit. In case one of the aforementioned PSU fails, the second immediately takes over in order to allow the system to sustain seamless operation.
The FSP700-70RGHBE1 is 80 PLUS Gold certified, and as expected, its hot-swap PSUs use a contemporary design featuring an APFC converter along with DC-DC convertors. Because this PSU follows the ATX PS/2 form factor, it will be compatible with the majority of ATX chassis without the use of extra brackets or other modifications. In addition, FSP provides four sets of brackets along with the unit, which allow its installation in most server chassis.
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Some of you may wonder how a redundant PSU operates. For starters, in order for a PSU to be redundant, it has to include at least a couple of hot-swap PSUs. In the case of the FSP700-70RGHBE1, each of the two embedded PSUs features its own power pin-out. Under normal conditions, FSP stated, both PSUs operate sharing the load for increased efficiency and stability, but if one of them fails, then the other one automatically fully takes over. By “hot-swap,” we mean the ability to change the failed PSU on the fly, without having to shut down the system. The fact that both PSUs share the load under normal conditions isn’t as easy as it sounds, because it requires each PSU to know exactly the load levels that its counterpart handles, and this needs a sophisticated load sharing mechanism.

Both Twin Series units are supported by an LED alarm guard system that alerts their operators to any problems that might arise, simplifying problem diagnosis. If a power supply fails, an alarm will go off, and an LED indicator will show which power supply needs to be replaced. In addition, the PSUs communicate with the system through a digital interface (PMBus). With the provided application, users can monitor the status of the PSUs.

Model Number FSP700-70RGHBE1
Max. DC Output 700W
PFC Active PFC
Efficiency 80 Plus Gold
Modular No
Intel Haswell Ready Yes
Operating temperature 0 °C ~ 50 °C
Protections Over Voltage Protection
Over Current Protection
Short Circuit Protection
Over Power Protection
Hold-up time
  • 115V/60Hz 17ms. Minimum@100% Load
  • 230V/50Hz 17ms. Minimum@100% Load
MBTF 100,000h @ 25 °C
Dimensions 150 mm (W) x 86 mm (H) x 190 mm (D)
Input Range 90 – 264 VAC
Altitude 5000m
Warranty 3 years

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