Hi,
The reference for this design has been taken from the attachment ( slua303.pdf ). They have discussed about ZVS there.
If ZVS will not happen, what is the required leakage energy and how to calculate the same to achieve ZVS?
How much efficiency…
Hi Tracy,
We have a application note which can guide you how to design a ACF board with UCC2897A, I attached it for your reference.
Also we have EVM board on line. you can order one to test it . The link as below:
0044.Understanding and Designing…
Hi Alec,
Adjust gate driver resistor value only can speed up/down the turn on slew rate of MOSFET , But what we are talking about are hard switching or ZVS.
before the main FET turn on , there is must have a negative current through body diode .then…
Hi Tracy,
Firstly, you have to correctly biased the TL431B , TL431B require a minimum cathode current for regulation, it is 0.7mA. So please parallel a 1K resistor on the opto-coupler diode. I don't know how you adjust the loop compensation that let…
Hi Alec,
Attached an application notes for your reference. there is a step by step guideline to calculate the output inductor and the AUX winding turns .
You can find it from page 9th . hope can help you.
Thanks. Understanding and Designing…
Hi Hsu cheng,
Please kindly find attached UCC2897a Design Calculator in excel format. and I also attached a paper about how to designing an Active Clamp Current
Mode Controlled Converter Using the UCC2897A, in which you can get the answers of the…
Hi,
Im looking at the document (attached) SLUA303. At page 38, equations 108 and 109. How can I plot these two equations to illustrate my uncompensated loop?
18541208960192.pdf
Hello Tansel,
The UAF42 topology does not accommodate differential operation. I suggest using a multiple-feedback (MFB) active filter which lends itself nicely to a differential input, or fully differential filter. I wrote an article for TI's AAJ some…
Hi,
I've attached the 2013 User's Guide for power products. Starting on page 53 you will find a selection of PWM controllers. many of these teh frequency can be varied according to external criteria.
As an example if you use a UC3842 it is a simple…
Gary,
Most any of our power controllers with dual output capability will provide the control. See attached document starting at page 50 with the dual output controllers on page 53 and 54 and choose what features you want.
Regards,
John
