Abstract: An improved current sharing signal coupling/decoupling circuit for power converter systems, including the provision of an individual current sharing signal coupling/decoupling circuit for each module of a number of parallel connected modules, each circuit providing an interface between a module's "current sharing signal" port and a common connection bus. The signal coupling/decoupling circuits also share a common ground noted in the disclosure as "current sharing signal ground". The signal coupling/decoupling circuit includes a comparator, a bi-directional switch and a variable voltage reference. The comparator senses the difference between the voltage on the common connection bus, the "common current sharing signal," less an amount set by the variable voltage reference circuit, and the voltage on the module current sharing signal port, the "module current sharing signal".

Abstract: An improved DC to DC converter apparatus including a metal-backed PC board which serves as the base plate of the device and has the principal power consuming components affixed thereto, and a conventional circuit board having the relatively lower power consuming electronic components affixed to it, the latter board being secured in closely spaced relationship to the metal-backed board using connecting elements which provide both electrical and thermal interconnection between the two boards. All device connect pins extend from the conventional board, and the entire device is potted in a thermally conductive potting material.

Abstract: An improved method and means for protecting converter circuitry during input overvoltage and all load conditions includes a control circuit which reduces duty cycle below requisite conduction time for effective signal conversion with resulting reduction in load current.