One method used to increase the reliability of high availability systems is though the use of redundant power supplies. These systems are powered by two or more supplies. These supplies are generated either by multiple sources or the system is connected to the main supply by the use multiple paths. Boards, connected to these redundant supplies, derive a single high availability rail through the use of diodes. This arrangement is called power rail OR’ing.
This reference design describes the use of a Lattice Power Manager II device to achieve Redundant Power Supply Management using the power supply OR’ing technique. This reference design is compatible with the Power Manager II Hercules Development Kits.
