Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

Inductorless Switching Off-line Power Supply Demoboard

Part Number: SR086DB1

Summary:

The SR086DB1 is an inductorless switching power supply intended for operation directly from a 120/230VAC line. Two outputs, 12.6V and 3.3V are provided. The operating principle is to turn on a pass transistor when the rectified AC input is below the output voltage, and to turn it off when the output storage capacitor is charged up to the regulation point. Since the

View More
Documents and Software
Overview
Features
Additional Resources
Related Tools

Additional resources data currently not available.

Documents and Software

Documents

6/25/2014
704KB

Product Features

    Please download the user guide for more information.

Summary

The SR086DB1 is an inductorless switching power supply intended for operation directly from a 120/230VAC line. Two outputs, 12.6V and 3.3V are provided. The operating principle is to turn on a pass transistor when the rectified AC input is below the output voltage, and to turn it off when the output storage capacitor is charged up to the regulation point. Since the output capacitor charges up on the rising edge of a sine wave, reasonable efficiencies can be obtained without the use of magnetics.