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LM3409HV工作频率上不去

各位好,我调试这个电路,输出灯珠的工作额定电压是54V,调试电路没达到额定电流(4A),但上电后灯珠不停闪,量电感输出波形,才几十HZ(我希望电路能工作到上百K频率),调整R22,R23,R24试过焊接一个到3个电阻,频率还是上不去,请问问题出现在哪里?