UC1526: Component operation

Hi,

You can refer to Fig 7, 8, and 9 to know the waveforms. Basically the OUTPUT-A and OUTPUT-B are in high or low, like rectangular shape. Fig 8 shows both OUTPUT-A and OUTPUT-B in parallel connection to GND then Vc becomes the driver. Fig 7 and Fig 9 are in push-pull.

 Frequency setup is based on page 6, oscillator period vs RT and CT.

CT has a saw tooth waveform to compare to COMP to determine the pulse width. RT CT also generate a pulse to set up the frequency period.

When using CS, the CS threshold will terminate the pulse before the time instant of COMP and CT.

Hi,

These are for max duty. In a close loop system with adequate design, in its steady state the duty cycle is determined by the feedback loop but not reach max duty. If somehow your design reaches max duty then your design needs to modify since after reaches the max duty your Vout won't be able to regulate anymore.

Hi,

No.

A and B both have a similar max duty, but that max duty has a distribution with min that can be as low as 45%.