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+12V单电源供电

Other Parts Discussed in Thread: LM2586, TPS54160, TPS62140, LM2587

您好,我现在只有+12V单电源供电,想通过正12V转成-12V和正负5V,也就是说我通过+12V单电源供电,我需要用正负12V和正负5V给运放供电,电流最大0.5A,能不能推荐简单有效的办法,谢谢。