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。
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Hi
可以用TPS54160, TPS62140这样的降压芯片加耦合电感可以同时输出正负5V, 见设计文档,例如: http://www.ti.com/lit/an/slva616/slva616.pdf
TPS54160是非同步的,效率要差一点。
Hi
+/-12V , 如上用LM2587: http://www.ti.com.cn/product/cn/LM2587/description 这类回扫式flyback芯片来做。