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TPS61088 18650单锂电驱动XHP70 6V3A 恒流环反馈FB错误

Other Parts Discussed in Thread: TPS61088, TLV3012

用TPS61088 18650单锂电驱动XHP70 6V3A 恒流环反馈

去掉R14空载输出8.6V,连接R14空载输出11V

R7取1R设置电流为1A, 输出电流不稳定1~1.7A跳动,U3 TLV3012输出方波,U2 TPS61088间歇性工作

U3 TLV3012波形:(如图1)

手头别家样板用的是一个SOT23-5 AA68比较器,输出并不是逻辑输出,是可以变化的。怀疑U3 TLV3012是开漏逻辑输出,用在这里是否合适。

 

 

 

 

18650单锂驱动XHP70 6V3A LED.pdf