如下图电路图，300ma的电流，不是烧Q2，就是烧r1
，求高手改进电路，实现恒流，
3845/3843,48转12v电源分析
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I simulate your circuit, it works good with some small modification. I hope this would help you. There is about 400ma going through LEDs. However it is only simulation, you may have to fine tune it for your actual implementation.
我模擬的電路，它的工作好，一些小的修改。我希望這會幫助你。有400mA左右通過LED。然而，它只是模擬，您可能有微調，它為您的實際執行情況。
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