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求一个AC to AC的方案

Other Parts Discussed in Thread: LM339, LM2903, LM2904, UCC28180, LF353

如题,电源要求:输入100-250V(AC)50/60Hz

                             输出110V或220V(AC)(可切换)50/60Hz,带功率50W以上。

                             因为要体积小,要求是PWM控制输出

德州仪器有相应的方案或芯片吗?