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[原创] IDT P9038 Qi兼容5W发送器解决方案

关键词:电源管理 无线电源 WPC 1.2.2 P9038

时间:2017-07-03 10:16:03       作者:IDT       来源:中电网

IDT公司的P9038是集成了全桥逆变器的Qi兼容的8W无线功率发送器,具有WPC指标1.2.2,工作电压4.6V-6.9V,和接收器系列P902x组成完整的无线电源系统方案.P9038还提供电阻编程的外无检测(FOD),内置过流保护和可编的过压/超温保护.主要用在装备,PC外设,坚固耐用的电子齿轮,小型设备和电池供电的电子设备.本文介绍了P9038主要特性,功能框图和应用电路,以及评估板P9038-R-EVK 5W无线功率发送器参考设计主要特性,电路图,材料清单和PCB设计图.

The P9038 is a WPC-compliant Wireless Power Transmitterfor A5 and A11 designs operating from 5V suppliesconforming with WPC Specification 1.2.2. Operating in the WPC-compliant mode, the integrated full-bridge invertersupports 8W power transfer utilizing the P902x Receiverfamily, and ensures efficient switching with EMI/RFI emissionsthat are better than the requirements of the WPCspecification.

To safeguard the device and the system under faultconditions, the P9038 offers resistor programmable ForeignObject Detection, built-in Over-Current protection, andprogrammable Over-Voltage / Over-Temperature protection.

This transmitter is extremely easy to use and provides acomplete WPC-compliant solution with minimum externalparts count, requiring significantly less board space and lowertotal solution cost than competing products.

The P9038 is available in a compact 7 x 7 mm VFQFPNpackage, and it is rated for -40° to +85°C temperature range.

P9038主要特性:

• 4.5V to 6.9V input operating voltage range, supporting:
• USB or AC adapter
• USB dedicated charger port (DCP) detection
• WPC-1.2.2 compliant for A5 or A11-type coils
• Integrated, high-efficiency power stage with low RDS(ON)
• Integrated foreign object detection & current sense
• Excellent EMI performance eliminates need for EMI filter
• Supports up to 8W power transfer to the receiver
• Demodulates and Decodes Communication Packets fromWPC-compliant Receivers
• I2C Interface for EEPROM access
• Programmable input over-voltage protection
• Programmable soft start
• Current limit and over-temperature protection
• -40° to +85°C temperature range
• 7 x 7 mm 56-VFQFPN package

P9038应用:

• Furniture
• PC peripherals
• Rugged electronic gear
• Small appliances
• Battery-powered electronics

图1.P9038功能框图

图2.P9038典型应用电路图

评估板P9038-R-EVK 5W无线功率发送器参考设计

The P9038-R-EVK is a turnkey 5 Watt, Qi-compliant wireless power transmitter reference kit for fast prototyping and design integration. The kit consists of an easy-to-use reference board and comprehensive support collateral that significantly eases design-in effort and minimizes time-to-market. 

An associated layout module enables direct instantiation on to a system board, while an optimized and fully-tested Bill-of-Materials (BOM) takes the guess-work out of component selection. The P9038-based solution is well-suited for a wide range of applications, including PC peripherals, furniture, medical devices, and other portable devices still hindered by traditional contact-based charging bases or cables. 

评估板P9038-R-EVK主要特性:

WPC 1.1.2 (Qi) compliant for interoperability w/ other devices
Compact form factor for fast prototyping
Layout module provided for direct copy to system board
2-layer PCB reference layout and fully-tested BOM (check BOM)
4.5 V to 6.9 V input, designed for 5 W output on the receiver side
Integrated power stage for low BOM / mfg. cost and small PCB area
Input in-rush control prevents surges with inexpensive power adapters
High-quality transmitter coil by Wurth Elektronik (learn more)
Kit contains: reference board and USB cable
See the P9038 on SchemeIt™ online schematic drawing tool
Supported by extensive library of digital support collateral (see below)

评估板P9038-R-EVK包括:

• One fully-assembled P9038-R-EVK reference board
• USB to Micro USB cable
• Application notes, datasheets, manuals, guides, videos,layout files, and other digital resources can be found at:idt.com/P9038-R-EVK

图3.评估板P9038-R-EVK外形图

图4.评估板P9038-R-EVK电路图
评估板P9038-R-EVK材料清单:




图5.评估板P9038-R-EVK PCB元件布局图

图6.评估板P9038-R-EVK PCB布局图(顶层)

图7.评估板P9038-R-EVK PCB布局图(底层)
详情请见:
https://www.idt.com/products/power-management/wireless-power/wireless-power-transmitters/p9038-r-evk-wireless-power-transmitter-reference-solution
IDT_P9038-R-EVK-Manual_MAR_20150923.pdf
IDT_P9038-Datasheet_DST_20160801.pdf

 

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