Part Number: UCC38503 Hi. What PFC frequency limits can I set for the 38503? The limits of the increasing part of the microcircuit are of interest, and not the decreasing one. I did not find this information in the datasheet
Part Number: UCC38503 Hi TI :
I use UCC38503 for 200W/12V power model with forward & PFC structure. I use 220Vac input & E-load(2A CC mode) to test the power model. But the waveform showed that the PFC spend 600ms from 12V established to Iac become stable…
Part Number: UCC38503 Hi Ti ,
I use UCC38503 as a PFC + forward power module design which rated output power is 300w. When output no load , the AC input current will become abnormal. The current waveform like inrush current when power on. The input AC…
Other Parts Discussed in Thread: UCC38503 Dear Sir or Madam
Data-sheet for UCC38503 does not contain tolerance for the value of PFCOVP threshold level.
It only has a value of 8V on Block Diagram (page 8). In Pin Assignment for “OVP/ENABL”, it says that…
Hi Richard
I'd like to ask you a direct question regarding the UCC38500 PFC/PWM Combination Controller, so I apologize for my jumping into the middle of another post: we'd like to explore its use as a general purpose AC/DC power supply in a new product…
