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怎么把LM2575可调芯片输出+8v，变成-8v，现在有一个+8v的电路图，怎么接成-8v，很急，，谢谢！！！

bingjie zhao
Prodigy 130 points
Other Parts Discussed in Thread: TPS5430

现在需要一个-8v的电源给电路供电，只有+8v的电路图，想问一下，怎么把这些变成-8v的，或者可以还有什么方案能让+8或者+12或者+5的正电源变成-8v电源，，谢谢了，很急用！！！