EUP8268-一款具备USB OTG功能和电源路径管理功能的2.5A单节锂电池开关充电器  DataSheet
概述
EUP8268是一款具有电源路径管理功能的单节锂电池开关充电器，广泛应用于手机和其他便携设备。该芯片内部集成的同步降压稳压器不仅为系统供电，同时给电池充电提供稳定的电压。该芯片支持USB输入和AC适配器输入。EUP8268同时具备USB OTG功能，通过IN pin 输出5V电压。
智能电源路径管理允许EUP8268调节系统电压用于给外部负载供电，并能够独立且同时对电池充电。这使得即使在电池缺失或电池深度放电的情况下，系统仍能够立即运行。另外，智能电源路径控制允许电池向系统供电，以便补充在供电系统中的功率需求增加到超过输入功率限制或者没有输入的情况下的额外负载功率。
该EUP8268具有高集成度，所有的电源开关都包含在芯片内部。无需外部MOSFET，续流二极管以及电流检测电阻。
芯片的状态监控输出引脚显示电池的充电状态。其他功能包括电池温度监测和充电超时检测。
EUP8268采用16引脚，3mm 3mm UQFN 封装。
特点
• 18V的绝对最大输入电压
• 4.5V-5.5V 的输入工作电压范围
• 智能电源路径管理
• 升压模式输出5V/1A转换效率90%
• 控制回路：输入电压限制、恒流充电回路、终端电池电压控制
• 1.6MHz 开关频率
• 高达2.5A 的可变成充电电流，无需外部精密采样电阻
• 预先设定4.2V或4.35V的电池电压
• 支持USB输入和AC适配器
• 全集成电源开关
• 充电工作显示
• 电池温度监测
• 小尺寸封装的特点
• 3mm 3mm UQFN-16 封装
• 符合RoHS规范及100%无铅
应用
• 智能手机
• 电子书
• GPS定位系统
• 便携式手持解决方案
EUP8268-2.5A Switching Charger with USB OTG Operation and Power Path Management for Single Cell Li+ Battery
Description
The EUP8268 is a highly-integrated mode battery charger with power path management for single-cell Li-ion battery in a wide range of smart phone and other portable devices. It integrates a synchronous BUCK regulator to provide regulated voltage for powering the system output and at the same time charging the battery. This device supports both USB and AC adapter input. The EUP8268 also meets USB On-the-Go (OTG) operation power rating specification by supplying 5V (typical) on IN.
The smart power path management allows EUP8268 to regulate the system voltage for powering an external load and charging the battery independently and simultaneously. This allows immediate system operation even under missing or deeply discharged battery. Additionally, the smart power path control allows an internal connection from battery to the system in order to supplement additional power to the load in the event the system power demand increases over the input limited power or the input is removed.
The EUP8268 features high integration with all the power switches included inside. No external MOSFET, blocking diodes, or current sense resistor is required.
Status monitor output pins are provided to indicate the battery charge status. Other features include battery temperature monitoring and charging safe timer detector.
EUP8268 is available in 3mm 3mm UQFN-16 Package.
Feature
• 18V Absolute Maximum Input Voltage without External High Voltage Protection Circuit
• 4.5V-5.5V Input Operating Range
• Smart Power Path Management
• 1ASynchronous Boost Converter in OTG Mode up to 90% efficiency
• Control Loops: Input Voltage Limit, Constant Charge Current, Terminal Battery Control.
• 1.6MHz Switching Frequency
• Up to 2.5A Programmable Charge Current without Expensive Milliohm Sense Resistor
• Preset 4.2V or 4.35V Charge Voltage
• Single Input for USB and AC adapter
• High Integration includes all MOSFETs
• Charging Operation Indicator
• Battery Temperature Monitor
• Small Size Package Features
• 3mm×3mm UQFN-16 Package
• RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free
Application
• Smart Phone
• Tablet PC
• GPS
• Portable Hand-held Devices
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