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| 文章來源： 更新時(shí)間：2014/8/21 10:08:00 |
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Freescale公司的WCT1000是無線電源發(fā)送器控制器,集成了WPC Qi兼容的無線電源發(fā)送設(shè)計(jì)所需的所有功能,是低功率5W解決方案.單電源輸入4.2V起,典型值為5V,12V和19V,采用Freescale Touch技術(shù)得到超低待機(jī)功耗,低于25mW.本文介紹了WCT1000主要特性, 無線充電系統(tǒng)功能框圖, WCT1000功能框圖, 無線發(fā)送系統(tǒng)設(shè)計(jì)案例電路圖以及單線圈無線充電器參考設(shè)計(jì)WCT-5W1COILTX主要特性和優(yōu)勢(shì),框圖,電路圖和材料清單.
The WCT1000 is a wireless power transmitter controller that integrates all required functions for WPC “Qi” compliant wireless power transmitter design. It’s an intelligent device to work with Freescale touch sensing technology or use periodically analog PING (configurable by user) to detect a mobile device for charging while gaining super low standby power. Once the mobile device is detected, the WCT1000 controls the power transfer by adjusting operation frequency of power stage according to message packets sent by mobile device.
In order to maximize the design freedom and product differentiation, WCT1000 supports any low power guided positioning single coil power transmitter design (WPC types or customization) using operation frequency and duty cycle control by software based solutions. Besides, easy-to-use FreeMASTER GUI tool with configuration, calibration and debugging functions provides user-friendly design experience and speed time-to-market.
The WCT1000 includes digital demodulation module to reduce external components, over-voltage/current/ temperature protection and FOD method to protect from overheating by misplaced metallic foreign objects. It also handles any abnormal condition and operational status, and provides comprehensive indicator outputs for robust system design.
WCT1000主要特性:
Low power (5 W) solution for Wireless Power Consortium (WPC) compliant transmitter design
Conforms to the latest version low power WPC specifications
Supports wide DC input voltage range starting from 4.2 V, typically 5 V, 12 V and 19 V
Integrated digital demodulation on chip
Supports all types of receiver modulation strategies (AC capacitor, AC resistor and DC resistor)
Supports Foreign Object Detection (FOD)
Dynamic input power limit for limited input power supply, like USB power.
Super low standby power (less than 25 mW) by Freescale Touch technology
Supports any guided positioning single coil power transmitter solutions using frequency and duty cycle control
LED & buzzer for system status indication
Over-voltage/current/temperature protection
Software based solution to provide maximum design freedom and product differentiation
FreeMASTER GUI tool to enable configuration, calibration and debugging
WCT1000應(yīng)用:
Low Power Wireless Power Transmitter
Any guided positioning single coil solution with frequency & duty cycle control (WPC A types or customer properties)
圖1.無線充電系統(tǒng)功能框圖
圖2. WCT1000功能框圖
圖3.A11配置無線發(fā)送系統(tǒng)設(shè)計(jì)案例電路圖
單線圈無線充電器參考設(shè)計(jì)WCT-5W1COILTX
This document describes how to use the 5 W low power wireless charger transmitter WCT_A11 reference board designed by Freescale. The A11 Reference solution is compliant with the WPC Qi V1.1 specification. It is a low cost reference solution which can be easily customized through the FreeMASTER GUI tool.
The 5 watt single-coil wireless charging transmitter reference design uses Freescale’s MWCT1000 transmit controller IC to manage and perform all control functions necessary to implement a wireless charging transmitter solution. This solution is highly optimized to provide the lowest bill-of-materials cost, as well as highest performance. The design complies with the Wireless Power Consortium’s latest Qi specification and is certified as a WPC-A11 transmitter type. Among the many features of this design, the solution has been developed to provide a more general solution which operates with many different coil types.
參考設(shè)計(jì)WCT-5W1COILTX主要特性:
Certified as WPC-A11 transmitter type
Greater than 75% transfer efficiency
Transmit IC consumes less than 30mA in active Run mode
On-chip digital demodulation
30mW standby power using proximity sensing
Robust foreign object detection algorithm
Ultra-low Bill-of-Materials cost
Support for current limited devices such as PCs
Supports any 5 watt single-coil application that uses 5 volt input source
參考設(shè)計(jì)WCT-5W1COILTX目標(biāo)應(yīng)用:
• 5 W single-coil wireless charging applications
• Mobile phone chargers
• Point-of-sale terminals
• Handheld medical devices
• Mobile phone accessories such as battery banks and active phone sleeves
• PC accessories, including keyboards and mice
圖3.WCT A11參考板外形圖
圖4.WCT A11參考板框圖
參考設(shè)計(jì)WCT-5W1COILTX特性和優(yōu)勢(shì):
圖5.WCT A11參考板主要元件分布圖
圖6.WCT A11參考板電路圖(1)
圖7.WCT A11參考板電路圖(2)
圖8.WCT A11參考板電路圖(3) |
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