Optocoupler/LED/nixie tube/photoelectric device

The FOD2743 opto-isolated amplifier consists of the popular KA431 precision programmed shunt reference and optocoupler. The optocoupler is a gallium arsenide (GaAs) light emitting diode optically coupled to a silicon phototransistor. It has 3 reference voltage tolerance levels: 2%, 1% and 0.5%. Current Transfer Ratio (CTR) ranges from 50% to 100%. It also has an excellent temperature coefficient of 50 ppm/°C. It is primarily used as an error amplifier/reference voltage/optocoupler function in isolated AC-DC power supplies and DC-DC converters. When using the FOD2743, power supply designers can reduce component count and save space in compact encapsulation designs. The tight tolerances eliminate the need for adjustment in many applications. The device features an 8-pin DIP white encapsulation.