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输出电感选用10uH，滤波电容0.1uF，工作模式PBTL，负载0.15R，芯片并联输出12A+，芯片及其容易热保护，降低输入电源电压，热保护的点提高，怎么提高热保护点？怎么散热效果更好？
负载太小了，3251最小的负载为1.6欧姆
