【应用】国产同步整流芯片KP4060LGA助力30W电源设计，工作频率支持600KHz，驱动电流最高可达5A

时间： 2023-02-12 来源：世强

技术问答

随着科技的发展，电路的整体功耗要求越来越低，低电压与大电流成为主流。传统设计小功率电源如30W电源，采样异步整流的方式将高压直流电输出成低压直流电，电路简单但是转换效率只能达到80%左右，如今主流的方式是使用同步整流来提高转换效率，最高可达95%。

本文推荐必易微的同步整流芯片 KP4060LGA，其中同步整流芯片在电源设计中的使用位置如图一所示：

图一：30W电源设计内部框图

必易微的同步整流芯片KP4060LGA在30W电源设计中的使用优势如下：

1、工作频率支持600KHz，满足大范围小功率电源设计，提高转换效率，供客户灵活使用；

2、集成180V高耐压检测电路和高压供电电路，支持QC、PD等快充协议；

3、开通和关断延时＜30ns，快速响应时间，减小电路损耗；

4、Gate驱动最大电流可达5A，配置外置MOS，相比肖特基二极管更加提高系统效率；

综上所述，必易微的同步整流芯片KP4060LGA适合用在30W电源设计中。

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