Dear All, Thank you so much for your kind suggestions on the design. Now I have decided to boost 48V to 180V Maximum only. I have selected 150kHz operating frequency for Boost Converter, with inductor 25uA, 3A. And the rated power is supposed to be 250W. My question are: 1. Is the operating frequency and inductor value selected practical? 2. What are the important things to consider for sizing components in this design? regards
What is the reason that the duty cycle for Boost Converter should be around 50%?
Started by ●December 8, 2011
Reply by ●December 13, 20112011-12-13
Reply by ●December 13, 20112011-12-13
On Dec 13, 6:34=A0am, Myauk <aungkokot...@gmail.com> wrote:> Dear All, > > Thank you so much for your kind suggestions on the design. > > Now I have decided to boost 48V to 180V Maximum only. I have selected > 150kHz operating frequency for Boost Converter, with inductor 25uA, > 3A. And the rated power is supposed to be 250W. My question are: > > 1. Is the operating frequency and inductor value selected practical? > 2. What are the important things to consider for sizing components in > this design? > > regards1, Depends on core losses, switch losses and diode trr 2, Heat Most PFC's boost 0 to 141Vdc to 375Vdc with PW>80% for part of the input AC cycle. The trick is; BW<12Hz to control the dreaded RHPZ. Regards, Harry