Two LED constant current drive power control decomposition
Date:2011-06-20 11:26
Status:Be resolved
Question:admin
is not very good to find a very accurate reference signal, commonly used transistor, the base drift to do big, there is that you can take the diode conduction value of about 1V to do the benchmark, this may be not high, the best is when the TL431 op amp plus basis, but circuit complexity. However, this constant-current power supply, constant current control accuracy is better than. And this constant current mode control, the output will have to add electrolytic filter, so the DC output power is
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