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LM5025A: SS软启动问题

Part Number: LM5025A
Other Parts Discussed in Thread: LM5025

1.刚上电时,LM5025A的SS引脚以20uA的电流源给SS外接电容充电,若SS引脚电压低于1V,会有占空比吗?SS达到1V后占空比是由SS决定还是COMP电压决定?若应用于正激,软启动主要是降低哪里的应力,是主MOS管吗?

2.LM5025A的OUTA和OUTB驱动能力很高,如驱动主功率MOS管,驱动电流的大小是取决于开关频率和QG吗?

3.如果不采用辅助绕组供电,驱动能力是否有限,辅助绕组为什么会提高效率?

谢谢