ADN2872

Question

Hi, 
 I'm working with the ADN2872 laser diode driver and have designed a solution using resistor setpoint calibration of average power and energy ratio. 
 The ADN2872 is used in DC-coupled mode with an Sanoc SBTD15-12 laser diode. 
 The problem I'm having is that in order to calibrate the values of Rpavset and Rerset needs to be increased to about 30 kOhm to achive an output of 550 uW. And from the datasheet I can read out that the maximum resistance value for Rerset is 25 kOhm. 
 What could be the problem? 
 Thanks for any input // Andreas

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