78M6613安全注意事项

摘要：本应用笔记讨论了Teridian公司的78M3301 ，单相电源测量IC 。描述测试设备，评估（EV ）板，在电路仿真器，通信接口的安全防范措施。文章介绍，作为传感器与78M6613目前的分流，然后V3P3必须直接连接到精确的能量测量精度为中性接线。这种拓扑结构呈现两个潜在的安全问题， ： 78M6613地面针是低于接地正常3.3V ; 78M6613接地引脚的线路布线逆转的事件，成为120/240 VAC 。文章就此解释说，任何外部测试设备连接到78M6613 -3.3V接地参考差距。

78M6613
A Maxim Integrated Products Brand
Safety Precautions
APPLICATION NOTE

AN_6613_048 October 2010

Introduction
When using a shunt as a current sensor with the 78M6613, V3P3 must be directly connected to the
NEUTRAL wiring for precise energy measurement accuracy. This topology presents two potential safety
issues:

The 78M6613 ground pin is normally -3.3 V below earth ground.
In the event of a LINE wiring reversal, the 78M6613 ground pin becomes 120/24