摘要：本应用笔记介绍78M6618功率和能量测量IC设计时的安全防范。涵盖的主题包括隔离测试设备， 78M6618评估（EV）板，在电路仿真器，通信接口。 78M6618
Safety Precautions
Simplifying System Integration APPLICATION NOTE
AN_6618_028 April 2010
Introduction
When using a shunt as a current sensor with the 78M6618, V3P3 must be directly connected to the
NEUTRAL wiring for precise energy measurement accuracy. This topology presents two potential safety
issues:
The 78M6618 ground pin is normally -3.3 V below earth ground.
In the event of a LINE wiring reversal, the 78M6618 ground pin becomes 120/240 VAC.
Therefore, any external……
