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| bq5102x WPC 5W無線電源接收器解決方案 |
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| 文章來源： 更新時間：2014/6/6 10:05:00 |
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TI公司的bq5102x是無線電源接收器,符合WPC V1.1協議,當采用Qi電感發送器時,無線電源系統能提供高達5W的功率.單片bq5102x提供電源轉換(整流和穩壓)以及WPC標準的數字控制和通信.輸出電壓在4.5－8 V間可調,5W時的系統效率79%,主要用在智能手機,平板電腦,Wi-Fi熱點,移動電源和其它手持設備.本文介紹了bq5102x主要特性,功能框圖, 雙模式無線電源系統框圖, 嵌入系統板的bq5102x電路圖以及評估模塊bq51020EVM-520主要特性,電路圖,材料清單和PCB元件布局圖.
The bq5102x device is a fully contained wireless power receiver capable of operating with the 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. The bq5102x device provides a single device power conversion (rectification and regulation) as well as the digital control and communication for WPC specification. With market-leading efficiency and adjustable output voltage, the bq5102x device allows for unparalleled efficiency and system optimization. I2C also 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 receiver allows for synchronous rectification, regulation and control and communication to all exist in a market leading form factor, efficiency, and solution size.
bq5102x主要特性:
Robust 5-W Solution With 50% Lower Losses
for Improved Thermals
Inductorless Receiver for Lowest Height
Profile Solution
Adjustable Output Voltage (4.5 to 8 V) for Coil
and Thermal Optimization
Fully Synchronous Rectifier With 96% Efficiency
97% Efficient Post Regulator
79% System Efficiency at 5 W
WPC v1.1 Compliant Communication
Patented Transmitter Pad Detect Function Improves User
Experience
Alignment Feature Through I2C Allows for User
Training to Find Best Position on Surface of TX
bq5102x主要用用領域:
Smart Phones, Tablets, and Headsets
Wi-Fi Hotspots
Power Banks
Other Handheld Devices
圖1. bq5102x簡化電路圖
圖2. bq5102x雙模式無線電源系統框圖
圖3. bq5102x功能框圖
圖4. bq5102x WPC 5W電路圖
圖5. 嵌入系統板的bq5102x電路圖
Bq51020無線電源接收器評估模塊bq51020EVM-520 (PWR520-002)
The bq51020EVM-520 (PWR520-002) 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 to evaluate the operation and performance of the bq51020 IC, a secondary-side receiver device for wireless power transfer in portable applications.
The bq51020 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. The bq51020 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 bq51020EVM-520 evaluation module (PWR520-002) demonstrates the receiver portion of the wireless power system. This receiver EVM is a complete receiver-side solution that produces 5-W output power at up to 1-A load with adjustable output voltage.
• The receiver can be used in any number of low-power battery portable devices as a power supply for a battery charger. With contact-free charging capability, no connections to the device are needed.
• 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
• Flexibility for Foreign Object Detection (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
• WPG LED indicator (turns on as VOUT goes high)
• PD_DET LED indicator --turns on as the RX is on TX pad
圖6. 評估模塊bq51020EVM-520電路圖
評估模塊bq51020EVM-520材料清單:
圖7.評估模塊bq51020EVM-520布局案例圖
圖8.評估模塊bq51020EVM-520頂層PCB元件布局圖 |
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