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LM5175: LM5175 Circuit Vout=24V problem

Part Number: LM5175

Dear TI sir

Test condituon1 : Vin = 19V,  Vout= 24V , Iout = 1.5A 

Test condituon2 : Vin = 26V,  Vout= 24V , Iout = 2.6A

After test ,  The L, C become so hot.  Any idea to slove this problem ?

Attached circuit came from WEBENCH,  is OK or not ?

LM5175 CKT with BOM.pdf