5556.Comparison of UCC3817 and UCC3817A family slua294 (1).pdf
Hello Douglas,
The difference in current amplifier inputs between these two devices is due to the difference in PWM comparator inputs.
The UC2854 has the CA output going into the negative…
Hello,
You have a low frequency instability in your power supply. You should re-calculate the compensation network component values in the feed back circuit. The first sample shows an instability at 0.3Hz and the second is unstable at 0.6Hz. When your power…
Other Parts Discussed in Thread: UCC28051 , UCC3817A , UCC28019 WE ARE HAVING DIFFCULTY MEETING THE 3% HARMONIC & 5% MAX THD LEVELS ON THE 3RD & 5TH HARMONICS USING THE UCC28051 PFC CONTROLLER ON A 35W CV SWITCHING SUPPLY
WE MUST MEET THIS SPEC DOWN…
I personally have not done one of these high frequency PFC designs. I am surprised that the specifications are from 47 Hz to 400Hz. Generally it is either high frequency or low frequency input.
I attended APEC a few years ago and there was paper given…