Maxim MAX17710低功耗高效能量采集充電和保護方案
發布時間：2011-8-13 11:58
發布者：Liming
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Maxim公司的MAX17710是低功耗高效能量采集充電和保護的完整系統,能管理輸出功率從1FW到100mW的能量采集器件. MAX17710還包括一個升壓穩壓電路,用來從低至0.75V的電源對電池進行充電,內部的穩壓器還保護電池免受過充的危害.輸出電壓采用LDO穩壓器給目標應用供電,電壓可選擇為3.3V, 2.3V或1.8V,可用在智能卡,遙控無線傳感器,存儲器和實時時鐘備用電池,半有源RFID標識,醫療設備以及高溫應用,軍用和航空航天與玩具等.本文介紹了MAX1771主要特性, 應用示意圖和框圖,功能框圖, 高壓和低壓充電源的充電能量采集框圖, 穩壓器輸出狀態圖以及MAX17710評估板主要特性,方框圖,電路圖,材料清單和元件布局圖. Energy-Harvesting Charger and Protector The MAX17710 is a complete system for charging and protecting micropower-storage cells such as Infinite Power Solution’s THINERGY® microenergy cells (MECs). The IC can manage poorly regulated sources such as energy-harvesting devices with output levels ranging from 1FW to 100mW. The device also includes a boost regulator circuit for charging the cell from a source as low as 0.75V (typ). An internal regulator protects the cell from overcharging. Output voltages supplied to the target applications are regulated using a low-dropout (LDO) linear regulator with selectable voltages of 3.3V, 2.3V, or 1.8V. The output regulator operates in a selectable low-power or ultra-low-power mode to minimize drain of the cell. Internal voltage protection prevents the cell from overdischarging. The device is available in an ultra-thin, 3mm x 3mm x 0.5mm 12-pin UTDFN package. MAX1771主要特性: Integrated Power-Management IC for Energy Storage and Load Management Lithium Charger 1nA Standby IQBATT 625nA Linear Charging 1μW Boost Charging Lithium Cell Undervoltage Protection Charger Overvoltage Shunt Protection 1.8V, 2.3V, or 3.3V LDO (150nA IQBATT) Lithium Cell Output Buffering Ultra-Thin, 3mm x 3mm x 0.5mm UTDFN Package MAX1771應用: Powered/Smart Cards Remote Wireless Sensors Memory and Real-Time Clock Backup Semiactive RFID Tags Medical Devices High-Temperature Applications Military/DoD and Aerospace Toys 
圖1.MAX17710應用示意圖
圖2.MAX17710應用框圖
圖3. MAX1771方框圖
圖4. MAX1771應用框圖
圖5.MAX17710高壓充電源的充電能量采集框圖
圖6.MAX17710低壓太陽能電池陣列的升壓電路能量采集框圖
圖7.MAX17710穩壓器輸出狀態圖 MAX17710評估板 The MAX17710 evaluation kit (EV kit) is a fully assembled and tested PCB that contains all the components necessary to evaluate the performance of the MAX17710 energy-harvesting charger and protector. The EV kit features the THINERGY® micro-energy cell (MEC) from Infinite Power Solutions, Inc. (IPS), a solid-state, rechargeable, thin-power solution. Solar cells are installed on the EV kit as the power source for an energy-harvesting application. The solar cells demonstrate low-power charging of the MEC with ambient light. The IC can regulate and charge from various energy-harvesting sources that can be added externally. The EV kit is a self-powered board. The EV kit output charges the THINERGY MEC with current as low as 1µA. The EV kit provides test points to monitor the inputs and outputs, and jumpers to test the various settings. An LED is included on the CHG output to indicate if the boost is operating. The IC is available in a 12-pin UTDFN package with an exposed pad. MAX17710評估板主要特性: Self-Powered by On-Board Solar Cells THINERGY Micro-Energy Cell (MEC) Included Variable Switching Frequency Adjusts for Input Power Levels Various Test Points Included for Evaluation Proven PCB Layout Fully Assembled and Tested Applications/Uses High-Temperature Applications Medical Devices Memory and Real-Time Clock Backup Military/DoD and Aerospace Powered/Smart Cards Remote Wireless Sensors Semiactive RFID Tags Toys
圖8.MAX17710評估板電路圖 MAX17710評估板材料清單:
圖9.MAX17710評估板元件布局圖 詳情請見: http://datasheets.maxim-ic.com/en/ds/MAX17710.pdf 和 http://datasheets.maxim-ic.com/en/ds/MAX17710EVKIT.pdf |
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