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这个设计中PMP21561和PMP21553中这个变压器是定制的吗？为什么买不到，能否提供一下购买方式？谢谢！
你好，这两个一个是MOSFET 驱动器一个是变压器，但官网不提供购买，你可以在以下官网链接查到，购买摁键是灰色的：
https://www.ti.com.cn/tool/cn/PMP21561
https://www.ti.com.cn/tool/cn/PMP21529
