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TPS92210D flickering issue

Hi Guys,

                I have attached the gerber and Schematic of down light. Previously , I have no problem with the design. Now after a short period of time, the output is slightly flickering. I checked the temperature of MOSFET and IC and Transformer, temperature is normal.

4405.24Watts Down_light.pdf

0143.24W ISOLATED.ZIP

 

                Transformer winding details also attached. Please suggest us , why the output is flickering.

 

 

                This is the transformer Details:

 

START

END

TURNS

SWG

INDUCTANCE

2

1

28T

31SWG x2

180µH

5

4

6T

36SWG

 

10

9

28T

28SWG x2

 

7

6

8T

36SWG

 

pls let me know the solution for these.

regards,

syed