Use of a LED Driver chip?

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treez

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Hello,
We are using the LT3791 current mode controller ic. We are connecting the "vin" pin to a 15V auxiliary power supply. However, the actual supply voltage is 28V and is connected to the IVINP pin.

Is this ok?

The datasheet doesn't say

LT3791 datasheet
http://cds.linear.com/docs/en/datasheet/3791fb.pdf
 

According to the datasheet, IVINx common mode voltage is independent of VIN level.
 
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