Redundant Dc Power Supply Circuit

3 3v 40a output power supply with load sharing and redundancy.

Redundant dc power supply circuit. Based on 2x texas instruments lm5050 ideal diode controllers in an oring configuration with external mosfets to provide redundant power for a dc load. Usually these components are connected in parallel and function as a single unit with one taking over if the other fails. This is the best way to go. Using separate building circuits to run your server s dual power supplies gives you all the benefits of full on redundancy.

An acopian redundant power package is installed by simply connecting the ac input and dc output terminals. Figures 2a and 2b show a 3 3v 40a output power supply with load sharing and redundancy. The ltc3729 controller in a 2 phase synchronize buck dc dc converter that provides 3 3v 40a output from a 5v 12v bus. You can even add redundant power supplies each with their own diode if you like.

The actual power supply voltage will be a little higher due to the diode. There are two possible modes for dual power supply configurations. The power supply can be discussed from the ac mains supply or the dc supply used for the plant control but a loss in either has the same dramatic effect. Figure 2a shows the first part of the circuit.

Redundant dc supply controller from circuit arcade on tindie. Redundant power features benefits. Power supplies connected for redundancy. When providing combined power care must be taken to ensure power is delivered in a balanced manner by all of the supplies.

Redundancy in a system is the practice of designing in duplicates of critical system components with the intention of increasing system reliability. Short circuit between the power supply and the redundancy module 4. Redundant power supplies are a topology where the outputs of multiple power supplies are connected to increase the reliability of the system but not to increase the power output. All wiring including isolation diodes output monitor circuits switches meters adjustments and connectors has been done for you.

Put a schottky diode between the power supply output and the 12 v lead acid battery then adjust the power supply for the desired float charge voltage at the battery. The input with the highest voltage is routed to the load while the other input is disconnected. Power supply 2 or failure of one power supply unit 3 neither problem will impair the supply of power.