低功耗无Y电容原边调整充电器的设计  

Design of PSR Charger with Low Power Consumption and No-Y Capacitor

作　　者：Jacky Zhang 

机构地区：[1]TI

出　　处：《电源世界》2014年第8期31-33,共3页The World of Power Supply

摘　　要：本文介绍一款使用TI控制芯片UCC28720设计的5W无Y电容充电器方案,并且介绍一种变压器结构设计。在去除了Y电容的情况下,依然能够通过EMI测试;同时,整机待机功耗在全电压范围内低于10mW。由于UCC2820是专为驱动三极管设计的原边调整控制器,使得整机的成本更有优势。This paper introduces the design of 5W no-Y capacitor charger with TI control chip UCC28720. Besides, the structural design of a transformer is presented. This charger can still pass the EMI test without Y capacitor and the whole standby power consumption is lower than 10mW in full voltage range. UCC2820＇s being PSR （primary-side regulation） controller special for drive transistor leads to a lower cost of the complete machine.

关 键 词：充电器 无Y电容 UCC28720 待机功耗 

分 类 号：TN86[电子电信—信息与通信工程]