Hi team
This is Joe the FAE from GZ office and my account is SAJ.
When using UCC28C44 to build a fly-back circuit, the FB/COMP/CS Pins together with the connected diodes/ comparator and SR register to build a current limit control circuit, and under take the role of feedback control loop.
we notice that, when UCC28C44 is applied in the fly-back circuit, the current which flows through the primary side of transformer is small, and the input voltage of CS Pin also small.
There are some questions:
1. If the internal comparator is a PWM comparator , where is the sawtooth wave of this comparator?
2. why there is no connection on the Set pin of RS register?
3. What's the accuracy level of the internal comparator, and how to configure the current sense resistance, if the input voltage of CS is too small, will this device work in open loop condition?
4. What's output waveform of OSC, is it a sine wave or a sawtooth wave or a square wave？
Thank you!
