满负荷效率高达的控制方案样本

下载后可任意编辑TI UCC28180 满负荷效率高达 95%的 PFC 控制方案关键词: 电源管理,AC/DV 转换器 ,PFC,UCC28180TI 公司的 UCC28180 是工作在连续导通模式(CCM)的 PFC 控制器,可得到高的电源效率,低电流失真和极好的电压调整,非常适合于100 瓦到几千瓦的 AC/DC 转换器,开关频率从 18kHz 到 250kHz,支持功率 MOSFET 和 IGBT 开关,主要用在服务器和台式电源,白色家电,工业电源和平板电视如 PDP,LCD 和 LED TV．本文介绍了UCC28180 主要特性, 框图,以及 360W 评估板 UCC28180EVM-573 主要特性,电路图,测试连接图,材料厂清单和 PCB 元件布局图. The UCC28180 is a flexible and easy-to-use, 8-pin, active Power Factor Correction (PFC) controller that operates under Continuous Conduction Mode (CCM) to achieve high Power Factor, low current distortion and excellent voltage regulation of boost pre-regulators in AC - DC front-ends. The controller is suitable for universal AC input systems operating in 100-W to few-kW range with the switching frequency programmable between 18 kHz to 250 kHz, to conveniently support both power MOSFET and IGBT switches. An integrated 1.5-A and 2-A (SRC-SNK) peak gate drive output, clamped internally at 15.2 V (typical), enables fast turn-on, turn-off and easy management of the external power switch without the need for buffer circuits.Low-distortion wave shaping of the input current using average current mode control is achieved without input 下载后可任意编辑line sensing, reducing the external component count. In addition, the controller features reduced current sense thresholds to facilitate the use of small value shunt resistors for reduced power dissipation, especially important in high power systems. To enable low current distortion, the controller also features trimmed internal current loop regulation circuits for eliminating associated inaccuracies.Simple external network...