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TPS40210 output drops fast

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allenhc

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Hi all
I constructed a boost circuit with TPS40210 according to TI Webench.My design is: Vin=24Vdc,Vout=200V,Iout=0.2A.I can get 190V output with no load.However, as soon as I add a load circuit,the output drops so fast to 0V...My load circuit is an oscillator.I don't know where the problem happens.:-x I need help!

Reguards
TPS40210_24V.jpg
 

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