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DLPC3479: 投图时,光机偶尔出现不亮的情况

Part Number: DLPC3479
Other Parts Discussed in Thread: DLPA3005

DLPC3479+3005+4710方案

internal pattern投图时,光机偶尔出现不亮的情况,此时3479并没有挂掉,还能通过I2C跟3479交互;

电流是通过如下设置的,bit value默认是1023,通过Rlim设定电流,请问如下设计是否会导致LED偶尔不亮;

或者是否还有其他因素导致LED偶尔出现不亮的情况,谢谢!