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按照官网生成的电路图制的板 输入 12v-19v电压，空载时输出5v正常电压，接负载后，负载电阻越小输出电压越小，求大神指教
首先原理图上传一下，不然无法定位问题，
其次负载电阻越小，以为输出电流越大，那就要检查输入是否限流
