本帖最后由 yushengjiexy 于 2014-10-9 08:29 编辑

芯片IC202是如何检测总线电流变化，从而通过TIP117扩流的？为什么手册上说“The starting point for such regulation is the charged state of the capacitor C202. Voltage changes on the bus are detected by comparator IC202 and compensated by current source transistor T202 until the voltage across the capacitor C204 has reached the same level as C202.”但我认为有R208的存在，所以C202处的电压应该一直高于C204的电压。还有，IC202搭成的是积分电路吗？



下面是TI手册的截图





此帖出自小平头技术问答