UCC28710DR

UCC2871x系列反激式电源控制器在不使用光耦合器的情况下提供隔离式输出恒压 (CV) 和恒流 (CC) 输出调节。此器件可处理来自主要电源开关和辅助反激式绕组的信息，以对输出电压和电流进行精确控制。 The UCC2871x family is a flyback power supply controller which provides accurate voltage and constant current regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The controller operates in discontinuous conduction mode with valley-switching to minimize switching losses. The modulation scheme is a combination of frequency and primary peak current modulation to provide high conversion efficiency across the load range. The control law provides a wide-dynamic operating range of output power which allows the power designer to achieve the <10-mW stand-by power requirement. During low-power operating ranges the device has power management features to reduce the device operating current at operating frequencies below 33 kHz. The UCC2871x family includes features in the modulator to reduce the EMI peak energy of the fundamental switching frequency and harmonics. Accurate voltage and constant current regulation, fast dynamic response, and fault protection are achieved with primary-side control. A complete charger solution can be realized with a straightforward design process, low cost and low component count.

• 小于 10mW 空载功耗采用初级侧调整 (PSR)，无需光耦合器
• 线路和负载具有 ±5% 电压调节和电流调节
• 700V 启动开关
• 100kHz 最大开关频率可实现高功率密度充电器设计
• 具有谐振谷底开关运行，可实现最高总体效率
• 频率抖动以简化电磁干扰 (EMI) 兼容性
• 宽 VDD 范围允许使用小型偏置电容器
• 针对金属氧化物半导体场效应晶体管 (MOSFET) 的已钳制栅极驱动输出
• 过压、低线路和过流保护功能
• 可编程电缆补偿 (UCC28710)
• 带有固定线缆补偿选项的负温度系数 (NTC) 电阻器接口（只适用于 UCC28711，UCC28712 和 UCC28713）
• 小外形尺寸集成电路 (SOIC)-7 封装
• 可使用 UCC28710 并借助 WEBENCH 电源设计器创建定制设计方案

• 用于消费类电子产品的 USB 兼容适配器和充电器
• 智能电话
• 平板电脑
• 摄像机
• 针对电视和台式机的待机电源
• 白色家电