In summary, power supplies are often connected in parallel to provide redundancy or to combine the two outputs to form one larger supply. The simplest solution is to parallel the outputs together, but in the event of a fault on one of the supplies the other supply will be affected. Inserting diodes in the current path, diode-Oring, will block the second supply from being affected during a fault, but provides no method of current sharing. Therefore the higher supply will provide the bulk of the current required. A diode-OR solution with current sharing capability allows for higher power conversion efficiency by operating the supplies near mid-capacity. Linear Technology’s LTC4370 is a controller that uses n-channel MOSFETs to implement the adjustable-diode method to balance the currents of two diode-ORed supplies.