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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
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

http://datasheets.maxim-ic.com/en/ds/MAX17710EVKIT.pdf
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