对于电动牙刷的无线充电,本来想着通过外部的电源适配器提供5v的芯片工作电压,然后再 通过无线充电管理芯片给牙刷供电。但我看市面上好多牙刷都是220V直充。也就是把开关电源和无线充电都集成到一块板子上来了,这样做可能我的板子体积就比较大了。ti有没有类似220V直供电压的无线充电解决方案,或者给我一些设计方面的建议
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