Opto-driver for electrical load - has timing element between opto-coupler and load driver in load current circuit

摘要

The opto-driver is coupled in an electrically-controlled matrix circuit. An opto-coupler (1) with a light-emitting diode (D) and a galvanially separate phototransistor or Darlington transistor (T2) is coupled to a driver element (4) in the supply current circuit for the load (3) via an RC timing element (2). Alternatively, the latter can be inserted in front of the input for the opto-coupler (1). Pref. the driver element (4) comprises a transistor or a Darlington transistor (T1) with its base coupled via the RC timing element (2) to the opto-coupler (1). USE - For light push-button switch.