Part Number: UC3875 Other Parts Discussed in Thread: UCC28951 I have odd behavior of a UC3875DWF. When a Power FET blows, it occurs after a number of weird "frequency drift with double-pulse" occurrences. The same IC on the same board will work…
Hi Experts,
Good day.
Hope you can help us. Were having a hard time comparing the three GPNs phase shift resonator controller. This info sheet ( LINK ) is not clear in comparing those devices.
Maybe in the screening process or the engraving technique. Any…
Part Number: UC3875 Other Parts Discussed in Thread: UCC28951 , UCC28950 , UCC28250 , UC2825 Hello team,
My customer has a related question with the following E2E. https://e2e.ti.com/support/power-management/f/196/t/598673
The schematics of the customer is…
Hello Solan. I replaced my ultra-fast diodes (D2,D3,D11,D4,D12,D7,D13,D8) with schottky diodes and all problems gone! Thak you! I thought common or fast diodes will be fine to, but no! Schottky diodes is crucial! But if it so necessary, why schottky diodes…
Part Number: UC3875 Hello TI! I got simple question about UC3875 DS. There is a parameter called "Output high(low) level" in output drivers section. What does this 2.6V means? Is it voltage drop on internal bipolar transistor or what? Thank you!…
Hello Vasily
It's been a while since the last post on this thread so I'm going to close it. Please feel free to open a new related thread if you need to continue this conversation.
Regards
Colin
Part Number: UC3875
1.Two scope pictures were show as above. As in PSFB DC/DC converter,when the load became larger, for example from 2kW to 2.3kW, the situation became unstable. when it is abnormal, the duty of C and D is 0.42. When it is normal, the…
Part Number: UC3875
Hello TI!
Recently I read application note for UC3875 PS controller and I've got a question about its implementation schematics. Why are DC-blocking capacitors not indicated in the circuit? Without them, the transformer will have…
Part Number: UC3875 Hi there,
I'm trying to find some guidelines for choosing an input capacitor for regular phase-shifted full bridge (PSFB) topology. Do you have something (any documents/ANs) to share with me? Any help you could provide would be…
Part Number: UC3875 Other Parts Discussed in Thread: UC3879 , UCC3895 , UCC28951 Hello. I am now working on a PSFB with CMC and trying to run CMC configuration on UC3875. It's not many information about CMC with slope compensation on datsheet, so i want…