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| bq5102x WPC 5W无线电源接收器解决方案 |
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| 文章来源： 更新时间：2014/6/6 10:05:00 |
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TI公司的bq5102x是无线电源接收器,符合WPC V1.1协议,当采用Qi电感发送器时,无线电源系统能提供高达5W的功率.单片bq5102x提供电源转换(整流和稳压)以及WPC标准的数字控制和通信.输出电压在4.5－8 V间可调,5W时的系统效率79%,主要用在智能手机,平板电脑,Wi-Fi热点,移动电源和其它手持设备.本文介绍了bq5102x主要特性,功能框图, 双模式无线电源系统框图, 嵌入系统板的bq5102x电路图以及评估模块bq51020EVM-520主要特性,电路图,材料清单和PCB元件布局图.
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主要用用领域:
Smart Phones, Tablets, and Headsets
Wi-Fi Hotspots
Power Banks
Other Handheld Devices
图1. bq5102x简化电路图
图2. bq5102x双模式无线电源系统框图
图3. bq5102x功能框图
图4. bq5102x WPC 5W电路图
图5. 嵌入系统板的bq5102x电路图
Bq51020无线电源接收器评估模块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
图6. 评估模块bq51020EVM-520电路图
评估模块bq51020EVM-520材料清单:
图7.评估模块bq51020EVM-520布局案例图
图8.评估模块bq51020EVM-520顶层PCB元件布局图
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