EUP9511-高效AC/DCPWM控制器  DataSheet
概述
EUP9511是一款高效电流模PWM控制器。自动切换连续工作模式（CCM）、谐振模式、断续工作模式以实现全范围高效。
EUP9511内置的工作频率会根据不同的负载而变化。随着负载由满载逐渐降低， 工作频率会逐步从65KHz降低到25KHz，直到进入断续工作模式。芯片具有超低的启动电流，绿色省电模式，波谷开启模式，电流检测边缘屏蔽和内部谐波补偿功能。同时，还具有过载保护，过压保护、过温保护等保护功能，保证系统的安全可靠。SOT23-6的封装，方便系统小型化的设计
特点
•超低启动电流 (<1200nA)
•电流模控制
•欠压保护
•固定65K工作频率
•逐周期检测CS引脚的过流保护
•持续90毫秒过载保护
•VCC引脚电压过压保护
•外部可调的输出过压保护
•内置斜波补偿
•100/-500mA驱动能力
•6.5mS 软启动功能
•SOT23-6 封装
•符合RoHS规范及无铅，无卤
应用
•AC/DC开关适配器
•电池充电器
•反激式电源供电系统
EUP9511-High Efficiency AC/DC PWM Controller
Description
The EUP9511 is a high efficiency current mode PWM controller. It feature Continuous Conduction Mode (CCM) and valley switching muti-mode control to optimize the control performance.
PWM switching frequency at normal operation is internal fixed and is trimmed along with the load change. When the output loading is getting lower, the EUP9511 switching frequency decreases from 65KHz to 25KHz gradually then further gets burst mode operation for light load efficiency.But in high AC voltage, EUP9511 will change the curve of the frequency to achieve higher efficiency. It includes low startup current, green-mode power-saving operation, leading-edge blanking of the current sense and internal slope compensation. In addition, all the required protections of OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit from damage under abnormal conditions.And integrated in a tiny SOT23-6 package, can be completely
Feature
•Very Low Startup Current (<1200nA)
•Current Mode Control
•UVLO (Under Voltage Lockout)
•Fixed 65KHz Switching Frequency
•OCP (Cycle-by-Cycle Over Current Protection) on CS Pin
•OLP (Over Load Protection) with 80mS Delay
•OVP (Over Voltage Protection) through VCC Pin for Internal
•OVP (Over Voltage Protection) through OVP Pin for External Adjust
•Internal Slope Compensation
•100/-500mA Driving Capability Applications
•Embedded Soft Start 6.5mS High-Efficiency Single-Stage Power Conversion
•Available in SOT23-6 Package
•RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free
Application
•Switching AC/DC Adapter
•Switching Battery Charger
•Open Frame Power Supply
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