【应用】国产双通道低侧栅极驱动芯片SGM48524XPMS8G助力800W服务器电源PFC,驱动电流达5A
在开关电源的输入功率大于75W的产品中,通常要加PFC电路,以减少负载对电网的干扰,同时可以提高电源的效率,以节省电能,降低企业成本。如图1为800w服务器电源整流和PFC(功率因数校正)部分的电路图框,其中PFC部分主要采用交错式PFC,这里MOS管S1和S2的开关主要通过栅极驱动芯片来驱动。
本文主要介绍国产圣邦微电子(SGMICRO)双通道低侧栅极驱动芯片SGM48524XPMS8G应用于800W服务器电源PFC的优势。
图1:800W服务器电源整流和PFC电路图框
国产圣邦微电子双通道低侧栅极驱动芯片SGM48524XPMS8G应用于800W服务器电源PFC具有以下优势:
1、SGM48524XPMS8G最大供电电压为20V,实际应用中MOS管主要是15V电压驱动,可知其具备较高耐压余量,适合用于电压波动较大的应用场景;
2、SGM48524XPMS8G拉、灌的峰值电流为5A,驱动能力强,可适用驱动不同厂家的MOS;
3、传播延迟典型值为18ns,适合应用于开关速度高的场合,以提高系统控制的时效性;
4、MSOP8封装,封装体积小,可节省布局空间;同时底部带散热焊盘,提高散热能力,工作更加可靠;
5、工作结温-40°C~125°C,具有宽的工作温度范围,可适应恶劣复杂环境。
图2:SGM48524XPMS8G封装以及管脚定义
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