Part Number: UCC28740 Hi team,
There is a description in the datasheet that the minimum current-sense threshold (VCST(min)) is 0.194 V for IPP(min).
Can you help explain more about the details? What will happen if it is lower than 0.194V?
Regards,
Xia…
Not a problem, thanks for the reply. It sounds like the logic is flipped, can you have the opto circuit configured to be like TIDA-01464? For the diode pin 1 should be pulled up to a DC voltage through a resistor, then have the output of the op-amp connected…
Hi Manuel,
I want to appreciate for your help and sparing your time to my questions.
I really understood how this IC works.
But lastly I have one more question if you would like to help me.
In my design using UCC28740, I do not have neutral connection…
Part Number: UCC28740 Hi,
I'm considering using this controller in my design, but I have some question regarding its operation.
Frequency:
How do I determine the maximum and minimum switching frequency specifically for my design requirements?
Input…
Part Number: UCC28740 Other Parts Discussed in Thread: TL431 Hi,
I designed a flyback converter with UCC28740 using WEBENCH tool and datasheet. My converter operated well, when i connect 200V from input, i can get 5V from output. But when i load the converter…
Thanks for your reply.
And i wana know that dose the low duty ratio affect the stability of the control loop?
Can The resistances and capacitors be set the same as PMP41009 while I used a different optocoupler and adjustable shunt regulator than PMP41009…
Part Number: UCC28740 Other Parts Discussed in Thread: PMP9204 ,
Hi
I have design AC DCSMPS 85 to 265 V@5V/1.5 A using reference design PMP9204.
Please review my layout
Part Number: UCC28740 Hi,
The customer uses this chip design but can not start, please check the attachment to help answer questions.
UCC28740.docx
Thank you!
Part Number: PMP11371 Other Parts Discussed in Thread: UCC28740
Dear TI,
may anyone look at below layout,cricital area are marked with correspondding text, the area shown is around 65mm vertical x 60mm ,
my concern is CS pin routing and placement,
i tried…
Part Number: UCC28740 Other Parts Discussed in Thread: LM5023 , UCC28600 Hi team,
Customers need a flyback solution like NCP1207.
some spec like HV start, Secondary-side regulation.
Can UCC28740 support how much power? Do you have a suitable solution? …