Power Integrations

Power Integrations, Inc., founded in 1988, is the leading supplier of high-voltage analog integrated circuits (ICs) used in power conversion. Power Integrations ICs enable compact, lightweight power supplies that are simpler to design and manufacture, more reliable, and more energy-efficient than those made with competing technologies.

Amplifier for Versatile Fiber-Optic Links

This reference design describes an amplifier applicable for versatile fiber-optic links.

Main Features

  • Suitable for extending the optical transmission distance between gate drivers with versatile fiber-optic interfaces and the corresponding control board
  • Adjustable optical output power
  • 15 V supply voltage

Application Conditions

  • Amplification of the optical power for long distance transmissions
  • Amplification of the optical power for transmission lines with attenuators (e.g. fiber-optic coupling elements)

Adjustable Fiber-Optic Output Power

The fiber-optic output power depends on the current through the optical transmitter D2. This current can be adjusted by THT resistor R5 (size PR02). The actual current can be estimated by the following formula:

latex!encoded:base64,SV97RDJ9PSAoMTVWIC0gVl97Zm1heCwgRDJ9KSAvIFI1IFwgd2l0aCBcIFZfe2ZtYXgsIEQyfSA9IDIuMDIgVg==

Recommended current levels of latex!encoded:base64,SV97RDJ9  are in the range of ~17mA (R5 = 750 Ohms) to ~60mA (R5 = 220 Ohms). The default value is set to ~30mA (R5 = 430 Ohms).

Source: Power Integrations

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