Switched mode buck led driver ic with external 11V bias supply into Vin pin?

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treez

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Is It ok to feed in an 11V bias supply into the VIN pin of the LT3756 Led driver ic.?..its used in a buck led driver with 48V = vin, so the ISP pin sees 48V.
Just checking its ok...it should be as it can do boost operation, and in that case, the VIN pin is definitely less than the ISP pin in voltage level

http://cds.linear.com/docs/en/datasheet/375612fb.pdf
 

Vin is the power input, not a bias input and This is a Boost regulator with Buck PWM on the low side.
48V is the output not vin.

Expect that your input current will be 125% x Iout * Vo/Vin e.g. if 48V, 500mA out , Iin=2.73A
 
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