Tag: power supply

Networks & Systems, News

“Cap-Drop” Approach Implements Offline Power Supply for Light Loads

September 13, 2016

Via: Electronic Design

Low-power applications such as e-meters (electricity or energy meters) often require a simple ac line-powered supply where a 3.3-V rail powers a microcontroller and charges a lithium-ion battery to 4.2 V. You can implement this with a mains-frequency power transformer […]