怎么使用spv1040 MPPT进行故障排除

我正在关注你的问题，因为我在设计中加入了类似的部分。它是SPV1050，我不认为问题是难以理解数据表并应用它。



以下为原文




I am following your question because I have included a similar part in my design. It is SPV1050, I don't think the problem is difficult the problem is understanding the datasheet and applying it.

嗨，安德鲁，谢谢你的回复。
我做了一些测量，发现以下内容：
1.芯片的MPPT功能不需要接线I_PLUS或I_MINUS。如果它监视输出电流，它会在内部进行;
2.我们的MPPT效率低（~40％）的问题是因为我们使用了非常小的输入功率（~15 mW）;将输入功率增加到200 mW可实现70％+ MPPT效率。不过，该芯片的数据表使用了> 0.25 W的规格。



以下为原文




Hi Andrew, thanks for your reply.
I did some more measurements and find the following:
1. the chip's MPPT function does not need wiring I_PLUS or I_MINUS. If it monitors the output current, it does so internally;
2.  our problem of low MPPT efficiency (~40%) is because we used very small input wattage (~15 mW); increasing the input wattage to 200 mW leads to 70%+ MPPT efficiency. The chip's data sheet uses >0.25 W for specifications, though.

how to adjust output current? why did mine has so low output current around 20mA triangle wave. shouldn't it be a constant output current? can somebody help me to work out this? i cannot find related documents to read this.