Analogue, Mixed Signal, LSI


Optically isolated error amplifier

24 October 2001 Analogue, Mixed Signal, LSI

Fairchild Semiconductor's FOD2712 optically isolated error amplifier combines an error amplifier, reference voltage and optocoupler in an 8-pin small outline package for use in isolated AC-DC power supplies and DC-DC converters. This allows power supply designers to reduce the component count and save space in tightly packaged designs. The optocoupler is a gallium arsenide (GaAs) light-emitting diode optically coupled to a silicon phototransistor, and provides 25 000 V r.m.s. isolation. The reference voltage is 1,24 V with a ±1% tolerance, the current transfer ratio (CTR) range is 100 to 200%, and the operating temperature range is -40 to +85°C. The FOD2712 comes in an 8-pin small outline package and has CSA and UL safety agency certifications.



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