PMP20588: PMP20588 Input Voltage

Part Number:PMP20588

I have a question about the flyback converter on the PMP20588 reference board. The schematic for the board lists an input of 12VDC +/-10% but under Parametrics here => http://www.ti.com/tool/PMP20588 it lists a Vmin of 10.8VDC and Vmax of 38VDC. I have a PMP20588B reference board on hand that I've tried with a 24VDC input and it appears to work fine. I am wondering is it OK to use a 24VDC input with this design?

Thanks,
Josh