【应用】小体积隔离式电源芯片SGM46000应用于电力时间同步装置，输出功率可达3W

时间： 2020-07-10 来源：世强

技术问答

在电力控制系统中，会用到一种叫时间同步装置的东西，用于从地球同步卫星上获取标准时钟信号信息，通过网络传输，为广电，电力，电信，国防等提供可靠的频率基准信息。

在这个电力时间同步装置中，使用的电源和信号必须都经过隔离，因此只能使用隔离式电源模块，常规的隔离式电源，需要一个DCDC控制器+变压器+整流+反馈+隔离光耦等部件，整个电源模块较复杂，而在一些低功耗IC的供电上，常规的隔离式电源模块在低负载下的效率也不高，针对这个问题，推荐圣邦微一款一体式IC的隔离式电源芯片 SGM46000，其应用原理图如下

图1

这款隔离式电源控制IC将所有的控制单元全部集成在一个IC中，外围仅需配置一个隔离变压器，外围电路非常简洁，体积小；其最输出功率可以做到3W，输出绕组上使用两颗二极管做整流，可以在后级再增加一个LDO，做末端的稳压，非常适合低功耗IC的小体积隔离式电源供电。

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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