I have a DC/DC converter that uses UCC2802D to convert 12V to 28V which works well. The question I have is "how can I use UC2842D to replace UCC2802D?" I looked at pin out and function for these two ICs, and seems they are very similar and pin-to-pin compatible, but when I use UC2842D to replace UCC2802D directly, I find it does not work, the output stay same as input, in other words, when I apply 12V input, and output is still 12V. Anyone can help to tell me how do I adjust or change something to make it work?
Thanks in advance.
David