在手册中IADJ脚没有使用并用一个10M欧和0.01UF电容串联在此，
1、如果我要使用IADJ那我最终实现的是限制最大电流输出还是动态模拟调光功能？
2、如果我想实现动态可调，是否可以像图二般通过一个电阻和电位器分压构成的0.18V-1.8V对IADJ进行模拟调光10:1？此时需要保留手册中的10M欧和0.01UF电容吗？
我的问题很紧急，麻烦TI的工程师尽快回复我
The LED current can be set, and controlled dynamically, by using the IADJ pin of the TPS92512. Below equation shows how to calculate the value of the current setting resistor (RISENSE) from the ISENSE pin to ground for the desired LED current.
The IADJ pin voltage range is 0 V to 1.8 V and is internally clamped at 1.8 V. If analog current adjustment will not be used, the IADJ pin can be connected to VIN through a resistor for a default ISENSE voltage of 300 mV. This resistor should be sized so that the current into the IADJ pin is limited to 100 µA or less at the maximum input voltage.
A precision reference between 0 V and 1.8 V can also be used on IADJ to control the ISENSE voltage. If no external voltage source is available, the IADJ pin can be tied to the RT/CLK pin either directly or using a resistor divider to generate a voltage between 0 V and 500 mV. If a resistor divider is used off the RT/CLK pin to generate the IADJ voltage it will introduce a parallel resistance with the RT resistor. High value resistors are recommended in that case and the parallel combination must be used to calculate the switching frequency.
The current sense voltage is most accurate with IADJ voltages between 180 mV and 1.8 V for a dimming range of 10:1.
Below 180 mV the TPS92512 dims well but may have more variation between circuits. Due to internal offsets pulling IADJ to 0 V will not result in a current sense voltage of 0 V. Some small current will continue to run unless the PDIM pin is pulled low or the device is disabled using the UVLO pin.
Thank you!
LINKS，你终于想起来回我了，我的样板已经做回来了，使用了电阻分压器来实现0.18-1.8v了，但是我有一个问题，由于我的负载只需要600MA的电流，此时电阻分压器分到的电压0.2-0.5V后续的电压就没有作用了，10:1的调光变成只有几档位，当我换上0.9A的负载时，此时档位或者说调光比会由4:1变成7:1但是还是没有办法10:1，所以我怀疑10:1是否受负载所需的电流影响。按我的理解电压10:1的话，电流也应该分成10档才对吧，但手册中的图5，也不是10档电压对应10档电流？
您好
通过TPS92512的IADJ引脚可以设置和动态控制LED电流。也可以在IADJ上使用0 V和1.8 V之间的精度基准来控制ISENSE电压。当IADJ电压在180 mV和1.8 V之间，调光范围为10:1时，电流检测电压最准确。低于180 mV， TPS92512变暗良好，但电路之间可能有更多的变化。如果需要的满量程电流是0.6 a，你能把感应器修改为0.3V/0.6=500mohm吗？
图二说的是我自己绘制的这张图，你能看到吗？