Maxim MAX17710低功耗高效能量采集充电和保护方案
发布时间：2011-8-13 11:58
发布者：Liming
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Maxim公司的MAX17710是低功耗高效能量采集充电和保护的完整系统,能管理输出功率从1FW到100mW的能量采集器件. MAX17710还包括一个升压稳压电路,用来从低至0.75V的电源对电池进行充电,内部的稳压器还保护电池免受过充的危害.输出电压采用LDO稳压器给目标应用供电,电压可选择为3.3V, 2.3V或1.8V,可用在智能卡,遥控无线传感器,存储器和实时时钟备用电池,半有源RFID标识,医疗设备以及高温应用,军用和航空航天与玩具等.本文介绍了MAX1771主要特性, 应用示意图和框图,功能框图, 高压和低压充电源的充电能量采集框图, 稳压器输出状态图以及MAX17710评估板主要特性,方框图,电路图,材料清单和元件布局图. 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应用: 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 
图1.MAX17710应用示意图 
图2.MAX17710应用框图 
图3. MAX1771方框图 
图4. MAX1771应用框图 
图5.MAX17710高压充电源的充电能量采集框图 
图6.MAX17710低压太阳能电池阵列的升压电路能量采集框图 
图7.MAX17710稳压器输出状态图 MAX17710评估板 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评估板主要特性: 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 
图8.MAX17710评估板电路图 MAX17710评估板材料清单: 
图9.MAX17710评估板元件布局图 详情请见: http://datasheets.maxim-ic.com/en/ds/MAX17710.pdf 和 http://datasheets.maxim-ic.com/en/ds/MAX17710EVKIT.pdf |
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