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https://e2e.ti.com/support/tools/simulation-hardware-system-design-tools-group/sim-hw-system-design/f/simulation-hardware-system-design-tools-forum/684634/tina-spice-transformer-less-ac-to-dc-design-for-5w-220v-ac-to-12v-dc
工具/软件：TINA-TI 或 Spice 模型
无变压器交流/直流设计，用于5W、220V 交流至12V 直流。
