Voltage Allowable Range of 48V Power Supply Structure

We know that the input voltage range of 12V power supply server motherboard is usually 5% positive and negative difference. If we adopt the structure of 12V bus + 12V battery BBU, it is difficult to achieve this voltage allowable range. Especially at high currents that may be as high as 23,000 amperes, the voltage drop at impedance of 1 milliohm is as high as 2 or 3 volts, and the voltage drop of copper exhaust is much higher than the voltage range of 5% or about 0.6 V. If the voltage drop is controlled by current sharing among multiple power outlets and buses, in addition to the cost and space mentioned above, additional DC/DC voltage stabilization circuit is needed to ensure the voltage reduction caused by BBU discharge. The total cost of this DC/DC voltage regulator circuit will be very high, which will also lead to the overall uneconomical system. In 48V bus structure, the main board usually has a wide range of input voltage of 36V-58V, bus voltage drop is no longer a problem, and battery BBU can be directly connected to 48V bus, without DC/DC voltage regulator circuit, so it is very easy to adopt 48V bus structure voltage allowable range.

SHW48200 48VDC Outdoor Power Supply MPPT Off-Grid Telecom Station Solar Hybrid System

■Adopt advanced MCU microprocessor control technology.
■Advanced MPPT Technology,High converting efficiency higher than 97% for minimizing energy loss.
■Reversed current protection at night, over voltage and reverse polarity protection.
■Capable of selecting different charging mode for various types of batteries.
■Protection degree:IP55
■Industy-leading power density compact size and high reliability;
■Doorframe designed with waterproof structure, posted on the seal and equipped with waterproof lock on the door double insulation design;
■Cabine adopt quality galvanized sheet or aluminum coated steel sheet as material, surface coating anti-UV power;
■Suitable for outdoor installation.

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