FOD2742A - Fairchild Semiconductor

FOD2742A Optically Isolated Error Amplifier

The FOD2742 Optically Isolated Amplifier consists of the popular KA431 precision programmable shunt reference and an optocoupler. The optocoupler is a gallium arsenide (GaAs) light emitting diode optically coupled to a silicon phototransistor. It comes in 3 grades of reference voltage tolerance = 2%, 1%, and 0.5%. The Current Transfer Ratio (CTR) ranges from.

Features

■ Optocoupler, precision reference and error amplifier in single package
■ 2.5V reference
■ CTR 100% to 200%
■ 2,500V RMS isolation
■ UL approval E90700, Volume 2
■ BSI approval 8661, 8662
■ VDE approval 136616
■ CSA approval 1113643
■ Low temperature coefficient 50 ppm/°C max.
■ FOD2742A: tolerance 0.5% FOD2742B: tolerance 1% FOD2742C: tolerance 2% Applications
■ Power supplies regulation
■ DC to DC converters Description The FOD2742 Optically Isolated Amplifier consists of the popular KA431 precision programmable shunt reference and an optocoupler. The optocoupler is a gallium arsenide (GaA.