Energy saving driving circuit and associated method for a...

Details Energy saving driving circuit and associated method for a... Energy saving driving circuit and associated method for a...

2007-11-23

2009-10-06

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Signal isolator

C250S2140SW

Reexamination Certificate

active

07598511

ABSTRACT:
An energy saving driving circuit and method is provided for use with a solid state relay (SSR). The circuit and method reduce the overall energy required to drive a solid state relay by maintaining the SSR in an “on” state with a minimal maintenance or holding current after applying a turn-n current. The driving circuit includes a control circuit configured for outputting a control signal; a turn-on circuit configured for providing an output current at a first current level for a first time period in response to the control signal; and a holding circuit configured for maintaining said output current at a second reduced current level for a second time period. The maintenance or holding current is reduced in respect of that of a conventional driving current, and in some cases may be an order of magnitude or more less in magnitude than a conventional driving currents thereby resulting in less energy consumed by the SSR.

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