Start a Design from Reference User can start a design from the below reference design too
http://www.bcdsemi.com

   - 5V 700mA Charger AP3708
  - 5V 750mA Charger AP3706
  - 5V 850mA Charger AP3706
 http://www.infineon.com

   - 16 V 60 W ICE3DS01
  - 160 W PFC TDA4863
  - 24 V 150 W with PFC
  - 300 W PFC ICE1PCS01
  - 5 V 12 W ICE3B0565

  - 160 W PFC AC-DC
  - 24 V 6.3 A 150 W DC-DC
  - Boost Converter Tutorial Template
  - Buck Converter Tutorial Template