Part Number: UCC28742 Hi team,
I have several questions below about UCC28742:
(1) Vs pin can compensate the current-sense threshold across the AC-input range. What's the meaning?
(2) The gate drive turn-off current is internally limited to about…
Part Number: UCC28742 Dear members,
I have used the chip “UCC28742DBVT” for designing a Power supply and I had compared our design with the designing tool of TI too. But there is an issue that I can’t understand. In two samples of ours, the circuit…
Part Number: UCC28742 Hi Experts,
I am using UCC28742 simplis model that is shown in ti.com/UCC28742 product page. But I meet two issues:
1. I cannot run POP or AC analysis with your example, the error report is shown in below picture, and you can…
Part Number: UCC28742 Hi,
I am using UCC28742 to drive an external mos. To test it individually, I have applied a VDD of 25V, CS 4V and VS of 4V. But there is no pulse at the DRV pin. Kindly suggest
Regards,
Pruthvi
Part Number: UCC28742 Other Parts Discussed in Thread: PMP40508 , PMP21513
Hello, I found a problem with a 50W multi-output flyback converter using UCC28742. When the output power is lower than 30W approx., The converter is on Region FM2 or AM…
Part Number: UCC28742 Hi team,
What's the board size of the UCC28742EVM-001? I don't have a board on my hand and I just feel like I should just ask here.
Thanks!
George
Hi Mike
While waiting for reply, I build the last pieces of PCB to test out ucc28742 and result is same, no drv output. Components was purchased from TI store and hopefully no issue. Important is the IC no able produce pulse output, even the first three…
Abhishek
The startup time is determined by how long it takes for VDD voltage to get to VVDD(on) VDD turn-on threshold, which is 21.6V typical. The time that it charges depends on what the voltage on the DC bulk is, what the startup resistance (R1, R3…
Part Number: UCC28742 Other Parts Discussed in Thread: UCC28600 , Hi team,
My customer want to design an ACDC convertor and the requirements are as below:
Input:
Three phase AC. After rectify, it is 540VDC (380VDC - 640VDC)
Output:
Main…
