I am working on an SMPS for boosting an input voltage to drive a single string of LED's. The input voltage range is from 18 to 32 volts. The output voltage needs to be about 60V and the drive current is around 0.760 Amps. I am working on using the HV9912 as the driver chip. The frequency is set to approximately 200KHz.
The question I have is this: I have calculated a required inductor rating of 90uH, what happens if I use something significantly larger(as in 2 or 3 times as large)? Will the duty cycle be the only thing affected? What effect does this have on the inductor current?