一个71M65XX计量IC的低电流电源

摘要：电容耦合的电源供应器已经在低成本的单相住宅米长的时间。这些电源无需变压器的工作和跨越高电压的电容，通常在200nF 680nF范围内产生的电压降。这种方法简单，经济的，但效率低，因为它不允许超过几毫安的负载电流。本应用笔记介绍Teridian公司的单相电能表的电容电源的改进设计。

71M65XX
Energy Meter ICs
A Maxim Integrated Products Brand

Application Note

AN_65XX_063 APRIL 2011

A Low-Current Power Supply for the 71M65XX Metering ICs
Introduction
Capacitor-coupled power supplies have been used for a long time in low-cost residential single-phase meters.
These power supplies work without transformers and generate a voltage drop across a high-voltage capacitor that
is typically in the 200 nF to 680 n