这是一个Buck电路，但是怎么计算流经LED的电流和整个电路的电流啊？
难道是按照下面说明书上的计算吗？不过那样算下来貌似不怎么对啊？求高手指教，谢谢！


The A6213 is a buck regulator designed for driving a high-current
LED string. It utilizes average current mode control to maintain
constant LED current and consistent brightness. The LED current
level is easily programmable by selection of an external sense
resistor, with a value determined as follows:
iLED = VCSREG / RSENSE
where VCSREG = 0.2 V typical.