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 most of…
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…
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…
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…
Part Number: UC3875 Hello TI!
I got another issue with UC3875. Now it's turn-on problem. When the 18VDC (300 mA limited) is applied to the PWM controller, it starts up, but the PWM signal is unstable: there are gaps in cycles, and the duty cycle is…
Part Number: UC3875 Other Parts Discussed in Thread: UCC28951 , UCC28950 , UCC27324 , UC2875 Hello! I an working now with PSFB using UC3875 and i know, it is quite old part but I have them in stock and I would like to use them, moreover, the question…
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!
Regards…
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 much…
Part Number: UC3875 HI
I am developing high power PSFB DC/DC stetp up converter with switching freq. 16 khz. One of the low freq. phase shift pwm contolers is UC3875 wich i am using in project, it gives max delay time 2,2 us which is
not enough because…
