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FOD2742B
8-PIN SOIC Error Amplifier Optocoupler

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Contents

General Description
Features
Applications
Ordering Information
Product Status/Pricing/Packaging
Order Samples
Safety Agency Certificates
Qualification Support

General Description

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 100% to 200%. It also has an outstanding temperature coefficient of 50 ppm/°C. It is primarily intended for use as the error amplifier/reference voltage/optocoupler function in isolated ac to dc power supplies and dc/dc converters.

When using the FOD2742, power supply designers can reduce the component count and save space in tightly packaged designs. The tight tolerance reference eliminates the need for adjustments in many applications. The device comes in a 8-pin small outline package.

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Features

  • Optocoupler, precision reference and error amplifier in single package
  • 2.5V reference
  • CTR 100% to 200%
  • 2,500V RMS isolation
  • UL approval E90700
  • 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%

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Applications

  • Power supplies regulation
  • DC to DC converters

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    Ordering Information

    The following options can be ordered with this part:

    Packaging Option Description
    R2 Tape and Reel (2,500 units per reel)
    R2V VDE0884, Tape and Reel (2,500 units per reel)

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    Product Status/Pricing/Packaging      buy now

    ProductProduct statusEco StatusPricing*Package typeLeadsPacking methodPackage Drawing
    FOD2742BFull ProductionRoHS Compliant$0.357SOIC8BOX TBD
    FOD2742BR2Full ProductionRoHS Compliant$0.386SOIC8TAPE REEL TBD
    FOD2742BR2VFull ProductionRoHS Compliant$0.386SOIC8TAPE REEL TBD
    FOD2742BVFull ProductionRoHS Compliant$0.357SOIC8BOX TBD
    * Fairchild 1,000 piece Budgetary Pricing
    ** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

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    Safety Agency Certificates

    CertificateAgency
    FI 21495 (801 K)
    FIMKOFIMKO
    E90700, Vol. 2 (470 K)
    UL (1577)Underwriters Laboratories Inc.
    1113643 (221 K)
    CSACanadian Standards Association
    136616 (2536 K)
    VDEVDE Pruf-und Zertifizierungsinstitut

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    Qualification Support

    Click on a product for detailed qualification data

    Product
    FOD2742B
    FOD2742BR2
    FOD2742BR2V
    FOD2742BV

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