Hello:
There is a circuit for Open loop testing of UC3825 in the d/s.
A long time ago, I had witnessed testing of this IC( with Unitrode lab in Irvine, CA)...so I know open-loop PWM generation with complete control over 0-100 % is possible.
We need to generate a variable PWM from 10% to 80% but from 10 kHz to 1 MHz. Most desirable will be 5V outputs. 2 out of phase will be highly desirable also.
Shall we proceed with UC3825 or is there another controller we should explore?
I am aware of an opamp-based App ckt in TI- but that seems to be suitable for sinewave modulation of the PWM and perhaps limited in frequency. On the other hand, maybe more stable than an "open-loop" circuit using a controller such as UC3825.
Any guidance in this matter will be highly appreciated.
r
