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TPS40210调试遇到了问题,请指导



我按照datesheet上的第二个例子焊接电路,电感手工绕制10uh的R1接0.1欧姆电阻,LED负载用40欧姆电阻代替,r6接1欧姆电阻BP到comp没有连接。调试现象是4.5V-12V可以升压到16V,1引脚128KHZ三角波,8脚只是出现尖脉冲,9脚8.5V,5脚0.28V,.问题是不能带负载,加上负载就到了电源电压,请高手指导!谢谢