TI 公司的bq25046 是5W(1.1A/5V)無(wú)接觸充電應用的電源集成電路,適用于有線(xiàn)和無(wú)線(xiàn)電源應用,具有5V穩壓輸出和集成的3.3V/15mA LDO,輸入電壓額定值30V,15V過(guò)壓保護閾值, 能給MSP430BQ1010 MCU直接供電,主要用在無(wú)線(xiàn)電源,智能手機,PDA,MP3播放器和低功率手持設備.本文介紹了bq25046主要特性,方框圖,典型應用和無(wú)線(xiàn)電源系統方框圖, 作無(wú)接觸電源接收器的應用電路以及bqTESLA無(wú)線(xiàn)電源系評估套件HPA688EVM主要特性,電路圖和材料清單(BOM).
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應用:
Wireless Power Applications
Smart Phones
PDAs
MP3 Players
Low-Power Handheld Devices

圖1.bq25046方框圖

圖2.bq25046典型應用電路

圖3.bq25046用作無(wú)接觸電源接收器的應用電路

圖4.無(wú)線(xiàn)電源系統方框圖

The bqTESLA™ wireless power evaluation kit from Texas Instruments is a high-performance, easy-to-use development kit for the design of wireless power solutions. Consisting of a single-channel transmitter and direct-charge receiver and associated magnetics, the kit enables designers to speed the development of their end-applications. The bq500110EVM evaluation module (EVM) provides all basic functions of WPC 1.0-compliant wireless charger pad. The EVM is intended to be used with bq25046EVM or any other WPC 1.0-compliant receiver.

This transmitter EVM is a complete transmitter-side solution that powers a bqTESLA™ receiver. The bq500110EVM requires single 19-V at 0.5 A power supply to operate and combines on the single printed-circuit board the transmitter electronics, input power socket, LED indicators, and the transmitting coil. The open design allows easy access to key points of the electrical schematic. The board has installed connectors for optional JTAG and serial interfaces that can be helpful to advanced users.



圖5. bqTESLA無(wú)線(xiàn)電源系評估套件外形圖

bqTESLA無(wú)線(xiàn)電源系評估套件主要特性:
Single-Channel Transmitter Featuring bq500110
5V Power Supply Receiver Featuring bq25046 and MSP430bq1010
Enables Designers to Speed Development of End Applications
No Additional Software Development Required
Allows for True Plug-and-Play Functionality
Designed for Compatibility with Qi Standard

bq500110EVM-688 性能指標:


圖6.HPA688EVM 電路圖(1)

圖7.HPA688EVM 電路圖(2)

圖8.HPA688EVM 電路圖(3)
bq500110EVM-688評估板材料清單: