Hi need some help here. I have designed a dc-dc boost converter to give output voltage of 11v from 6 v input. Well it has been implimented on PCB, works fine but one thing i din't understand well. The have adjusted the duty cycle to get my 11volts on load(LED Load), when i remove the load the output voltage is shooting to 30v to 40v. I checked in Pspice even there the output voltage shoots to the same value. Is the driver has bad regulation or what?? please let me know if i am missing some thing very important!!!