原标题：TI bq25046EVM-687无线电源接收器解决方案

　　TI 公司的bq25046 是5W(1.1A/5V)无接触充电应用的电源集成电路,适用于有线和无线电源应用,具有5V稳压输出和集成的3.3V/15mA LDO,输入电压额定值30V,15V过压保护阈值, 能给MSP430BQ1010 MCU直接供电,主要用在无线电源,智能手机,PDA,MP3播放器和低功率手持设备.本文介绍了bq25046主要特性,方框图, bq25046EVM-687评估模块主要性能指标，电路图，材料清单(BOM)，测试框图和元件布局图。

　　bq25046：1.1A, Single-Input 5-V Power Supply IC for Contactless Charging Applications The bq25046 is a highly integrated linear power supply IC targeted at both wired and wireless power applications. With an accurate 5-V regulated output and integrated 3.3-V LDO, the bq25046 is an ideal solution for wireless power supply solutions up to 5 W.

　　The bq25046 integrates several functions which enable a wireless charging solution within a small area and low component count. These include a 3.3-V LDO which drives an MSP430BQ1010 wireless controller, high-accuracy current sense for calculating receiver-side power usage, 100mA/400mA current limits enable robust communication at all load current levels, and integrated pass FET acts as load disconnect switch and 5-V regulator to protect downstream circuitry.

　　bq25046主要特性:

　　30V Input Rating, with 15V Over-Voltage Protection (OVP) Threshold

　　Integrated Charge Current Sense for Wireless Power Transfer

　　Efficiency Monitoring

　　3.3V, 15mA integrated Low Dropout Linear Regulator (VDD3.3)

　　Supplies Power to MSP430BQ1010 Directly

　　2% Output Voltage Regulation

　　Pin Selectable 100mA and 400mA Current Limit Enables Robust Communication

　　in Wireless Power Systems at any Output Current Level

　　Soft-Start Feature to Reduce Inrush Current

　　Status Indication – Power Good (PG) and Output Enabled (CHG)

　　Available in Small 2mm × 3mm DFN-10 Package

　　bq25046应用:

　　Wireless Power Applications

　　Smart Phones

　　PDAs

　　MP3 Players

　　Low-Power Handheld Devices

　　图1.bq25046方框图

　　bq25046EVM-687评估模块

　　The bq25046EVM-687 evaluation module (EVM) demonstrates the receiver portion of the bqTESLA™ wireless power system. This receiver EVM is a complete receiver-side solution that produces 5 V out at up to 1 A when coupled with the bqTESLA™ transmitter. Two key bqTESLA™ devices are shown on this EVM, the bq25046 and MSP430bq1010, and external components that support the two devices for a complete solution.

　　• The bqTESLA™ receiver can be used in any number of low-power battery portable devices as a power source for charging. With contact-free charging capability, no connections to the device are needed.

　　• Output voltage of 5 V up to 1 A

　　• External adapter switchover and control circuit

　　• Low-profile, external pick-up coil

　　• Frame is configured to provide correct receiver to transmitter spacing.

　　• Room above coil for testing with battery, key for tuning

　　bq25046EVM-687评估模块主要性能指标：

　　图2。bq25046EVM-687评估模块电路图(1)

　　图3。bq25046EVM-687评估模块电路图(2)

　　图4。bq25046EVM-687评估模块电路图(3)

　　bq25046EVM-687评估模块材料清单(BOM)：

　　图5。bq25046EVM-687评估模块测试框图