Flyback PSS controllers

CamSemi PSS controllers offer 5% CC/CV
+ programmable cable compensation

CamSemi’s PSS controllers are unique in combining Primary Side Sensing (PSS), ‘best in class’ current regulation and 5 star rated no-load power consumption to enable easy, low cost Energy Star 2.0 compliance. And all in a single device.

These advanced controllers offer:

  • +/- 5% current and voltage regulation
  • no-load power consumptions of <30 mW without compromising performance
  • quasi-resonant switching and emitter drive topology to deliver high efficiency and low EMI
  • programmable cable compensation from 1 to 10%
  • use of one controller for a range of end application frequencies

Manufacturers can now:

  • eliminate costly opto-couplers and all secondary side feedback components;
  • use low cost, bipolar transistors;
  • and save further costs in optimising their solutions and increasing design and manufacturing flexibility.

The chart shows 'best in class' current and voltage regulation achieved with a CamSemi PSS controller in a 5 W, 5 V charger design with 10% current compensation applied. Click for more detail.

Basic PSS schematic

Using CamSemi PSS controllers manufacturers can eliminate 10 or more components compared with a flyback design.