I use UC2843 desige the BOOST application, i want to limit the Max duty cycle at 80%, according the datasheet'figure7 ,the RT need to choose about 1.8k.
But at the PIN functions table recommends like that :
So if must need to limit the Max duty cycle at 80%,how to choose the RT and CT parameter? By the way In my application the swicth frequency desige at 63kHz.