LED5000 floating boost ringing issue

[Tanvir]

Hi team,

i working on floating boost converter by using LED5000 IC.

specifications are-

Vin- 12V

Vout- 36V, 100mA

schematic and components as per E design suite.

instead of 120uH i used 47uH just for functional test.

at Vin 12V my vout is 20V and LED starts flickering and observed IC ringing.

need help ..

thanks,