AN2544设计一个低成本的电源供应器，降压配置中使用1 VIPer12/22A-E

AN2544设计一个低成本的电源供应器，降压配置中使用1 VIPer12/22A-E

AN2544
Application note
Designing a low cost power supply using a
VIPer12/22A-E in a buck configuration

Introduction
Many appliances today use nonisolated power supply to furnish low output power required
to run a micro, LED display, and a few relays or AC switches. This type of power supply has
a single rectifier so as to reference the neutral to output ground in order to fire TRIACs or AC
switches. This article describes the use of the VIPer12A-E and the VIPer22A-E which are
pin-for-pin compat