Why do we use 48V power supply?

The choice of 48V was to maximize the distance between the user and the end office under the conditions at the time (36V is a safe voltage, and it is unsafe to exceed too much). Later, in order to be compatible with early equipment and reduce costs, the central office communication equipment still used -48V power supply.

Can a 48 volt DC power supply save a data center?

(Fig. 5) As shown in this example, when the power per rack exceeds 10 kW, the power distribution loss generated by traditional 12-V DC power is said to reach an intolerable level, but a 48-V DC power supply significantly contributes to power saving for a data center.

What is the operating voltage range for -48V system equipment?

For -48V system equipment, the required operating voltage range is -38.4V ~ 57.6V, but in fact we generally require the operating range -36V ~ -72V. The main consideration is that -48V system equipment must be compatible with –60V power supply system, which requires –48~-72V.

What is a 48 volt DC power source?

This technique has gained widespread support toward optimization of components and circuits and achieving industry-wide adoption in the data-center-related businesses. 48-V DC power is applied to the AC/DC power source to the DC/DC power input terminal of each computation board.

What power supply is used in a central office communication system?

Later, in order to be compatible with early equipment and reduce costs, the central office communication equipment still used -48V power supply. Likewise, with a negative power system, the positive ground is just a convention. It turns out that there is a saying that there are a lot of negative charges in the air.

Why is 48-V power feeding important?

Applications of 5G technology are accelerating daily, while processors including CPU, GPU, FPGA, ASIC, etc., used in data centers and edge AI servers, are evolving. With such evolution, problems such as load fluctuation and heat generation are created. As a solution, 48-V power feeding is getting more attention.