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| TI bq51025 WPC Qi協(xié)議10W無(wú)線(xiàn)電源接收解決方案 |
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| 文章來(lái)源： 更新時(shí)間：2014/12/1 11:28:00 |
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TI公司的bq51025是基于 WPC Qi協(xié)議的完整的無(wú)線(xiàn)電源接收器,提供單個(gè)器件電源轉(zhuǎn)換(整流和穩(wěn)壓)以及基于WPC v1.1標(biāo)準(zhǔn)的數(shù)字控制和通信,10W時(shí)的系統(tǒng)效率84%,可調(diào)輸出電壓44.5V-10V,主要用在智能手機(jī),平板電腦和手持設(shè)備,POS設(shè)備,充電寶和其它手持設(shè)備.本文介紹了bq51025主要特性,框圖, 應(yīng)用電路框圖, 采用 bq51025的無(wú)線(xiàn)電源系統(tǒng)框圖,以及無(wú)線(xiàn)電源接收評(píng)估板bq51025EVM-649 (PWR649)主要特性,電路圖,材料清單和PCB元件布局圖.
The bq51025 device is a fully-contained wireless power receiver capable of operating in the Wireless Power Consortium (WPC) Qi protocol, which allows a wireless power system to deliver 5-W to the system with Qi inductive transmitters and up to 10-W when operating with the bq500215 primary-side controller. The bq51025 device provides a single device power conversion (rectification and regulation) as well as the digital control and communication as per WPC v1.1 specification. With market-leading 84% system efficiency and adjustable output voltage, the bq51025 device allows for unparalleled system optimization. With a maximum output voltage of 10-V, the bq51025 offers a flexible solution that allows optimal thermal performance of the system. The I2C interface allows system designers to implement interesting new features such as aligning a receiver on the transmitter surface, or detecting foreign objects on the receiver. The bq51025 device complies with the WPC v1.1 communication protocol making it compatible with all WPC transmitter solutions. The receiver allows for synchronous rectification, regulation and control, and communication to all exist in a market-leading form factor, efficiency, and solution size.
bq51025主要特性:
Robust 10-W Receiver Solution Using Proprietary
Protocol With TI&3146;s 10-W bq500215 Transmitter
Post-Regulation LDO to Protect External Charger
Input from Rectifier Output Transients; Inductorless Solution for Lowest Height
Adjustable Output Voltage (4.5-V to 10-V) for Coil and Thermal Optimization
Fully Synchronous Rectifier With 96% Efficiency
97% Efficient Post Regulator
84% System Efficiency at 10-W
WPC v1.1 Compliant Communication and Control for Compatibility With Current TX Solutions
Patented Transmitter Pad Detect Function Improves
User Experience
Power Signal Frequency Measurement Allows Host to
Determine Optimal Placement on TX Surface
I2C Communication With Host
bq51025應(yīng)用:
Smart Phones, Tablets, and Headsets
Point-Of-Sale Devices
Power Banks
Other Portable Devices
圖1. bq51025框圖
圖2. bq51025應(yīng)用電路框圖
圖3.采用 bq51025的無(wú)線(xiàn)電源系統(tǒng)框圖
圖4. bq51025應(yīng)用電路:WPC v1.1電源-輸出7V/1.4A,I2C
圖5. bq51025嵌入系統(tǒng)板電路
無(wú)線(xiàn)電源接收評(píng)估板bq51025EVM-649 (PWR649)
The bq51025EVM-649 (PWR649) wireless power receiver evaluation kit (EVM) from TI is a high performance, easy-to-use development kit for the design of wireless power solutions. It helps designers evaluate the operation and performance of the bq51025 IC, a secondary-side receiver device for wireless power transfer applications. The bq51025 device is a fully-contained, wireless power receiver capable of operating in WPC v1.1 protocol which allows a wireless power system to deliver up to 5 W to the system when used with a Qi inductive transmitter. When paired with the bq500215EVM-648 (PWR648), the bq51025 is capable of delivering up to 10 W to the system. The bq51025 device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for WPC specification. The kit enables designers to speed up the development of their end-applications.
The bq51025EVM-649 evaluation module (PWR649) demonstrates the receiver portion of the wireless power system. This receiver EVM is a complete receiver-side solution that produces 10-W output power at up to 2-A load with adjustable output voltage. The 10-W output power can be delivered from various output voltages. The output current is limited so that the overall delivered power is less than 10 W. For example, a 10-V output can supply up to 1 A, whereas a 5-V output can deliver up to 2 A. The default configuration for this EVM is a 7-V output capable of delivering up to 1.43 A.
評(píng)估板bq51025EVM-649 (PWR649)主要特性:
• The receiver can be used in any number of devices as a power supply for a battery charger. With contact-free charging capability, no connections to the charging power source are required.
• 5-W power delivery with any WPC v1.1 transmitter
• 10-W power delivery with the bq500215 transmitter
• Highly-integrated wireless power receiver solution
– Ultra-efficient synchronous rectifier
– Very high efficiency post regulator
– WPC v1.1-compliant communication and control
– Only one IC required between RX coil and DC output
• Programmable output voltage to optimize performance for application
• Adaptive communication current limit (CM_ ILIM) for robust communication
• Supports 20-V max input
• Low-power dissipative overvoltage clamp
• Overvoltage, overcurrent, overtemperature protection
• 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 Foreign Object Detection (FOD) tuning
• Options to adjust the input current limit and output voltage using resistors or I2C
• Flexibility for FOD tuning
• Adjustable resistor that can be used to set RFOD
• Temperature sensing can be adjusted using external resistors
• Micro-USB connector for adapter testing configuration
• I2C connector (USB-TO-GPIO "HPA172" kit for I2C communication through computer is required)
• WPG LED indicator (Green LED is on when VOUT is high)
• PD_DET LED indicator (Orange LED is on when the RX is on TX pad)
圖6. 評(píng)估板bq51025EVM-649 (PWR649)外形圖
圖7. PWR649和PWR648的按裝連接圖
圖8. 評(píng)估板bq51025EVM-649 (PWR649)電路圖:輸出7V
評(píng)估板bq51025EVM-649 (PWR649)材料清單:
圖9. 評(píng)估板bq51025EVM-649 (PWR649)PCB元件布局圖:頂層 |
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