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如题，我要做一款超小的5V4A，请问TI可有方案借鉴？
你好：
20W左右的，可以使用UCC28610来做一反激电源，如果想效率更高点的话，次级使用UCC24610进行同步整流。
以下几个方案供你参考：
http://www.ti.com/tool/pmp6583
www.ti.com/.../ucc28610evm-474
www.ti.com/.../slua604.pdf
http://www.ti.com.cn/tool/cn/pmp6710
