UCC2891x参考设计电路|高压反激式开关应用电路

UCC2891x高压反激式开关专门用于隔离反激式电源，在无需光耦合器的情况下进行输出电压和电流调节。此篇主要介绍了UCC2891x特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

UCC2891x特性：±5%的输出电压调节精确性；115kHz最大开关频率，实现高功率密度设计；低压线路和输出过压保护；热关断

UCC2891x典型应用范围：直流和交流适配器、手机、平板及相机充电器；功率计算；电视待机开关模式电源(SMPS)，服务器，大型家电；LED驱动器

UCC2891x参考设计应用电路：

图1UCC2891x内部结构图

TheUCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltage and current regulation without the use of an optical coupler.

图2UCC2891x参考设计图

UCC28910andUCC28911are HV switchers dedicated to an off-line power supply in an isolated flyback configuration. HV switcher means that each device integrates the power switch, a 700-V power FET, with the control logic. The two devices have the same control logic and they are different only for the Power FET RDS(on) and for the operating current levels.

UCC28910中文数据手册:点击下载

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