1 / 7

Switch Mode Power Supplies

Switch Mode Power Supplies. V dd. Use of Transformers for Electrical (DC) Isolation Safety – Isolate output voltages from Electrical Grid Multiple Reference ( “ground”) Potentials Voltage Matching – Large difference between voltage levels of power source and converter outputs.

chuckm
Download Presentation

Switch Mode Power Supplies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Switch Mode Power Supplies Vdd Use of Transformers for Electrical (DC) Isolation • Safety – Isolate output voltages from Electrical Grid • Multiple Reference ( “ground”) Potentials • Voltage Matching – Large difference between voltage levels of power source and converter outputs. • Feedback must traverse isolation boundary • Separate winding for feedback • Optical isolation Gate Drive

  2. Transformer Converter Types: • Flyback Converter – Derived from Buck-Boost • Forward Converter - Derived from Buck • Full Bridge – Derived from Buck

  3. Buck-Boost Converter Flyback Converter (Assume CCM) (Assume CMM) Df f(t) + Vin - + Vout - iL(t) ip(t) is(t) ip(t) F(t) is(t)

  4. Flyback Converter (cont) Same as Buck-Boost

  5. Flyback Converter (cont) Same as Buck-Boost

  6. + Vin - + Vout -

  7. Multiple Secondaries + Vout,1 > 0 - + Vout,2 < 0 - Feedback

More Related