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  1. u乐国际娱乐官网 >  解决方案 >  [原创] ST STWBC-WA和STWLC04 1W可穿戴无线电源系统解决方案

[原创] ST STWBC-WA和STWLC04 1W可穿戴无线电源系统解决方案

关键词:电源管理 无线电源 可穿戴 STWBC-WA 时间:2017-12-07 10:13:07       作者:ST       来源:u乐国际娱乐官网

ST公司的STEVAL-ISB038V1是1W可穿戴无线电源系统,包括无线电源发送器STEVAL-ISB038V1T和无线电源接收器STEVAL-ISB038V1R.接收器采用11mm线圈,发送器采用20mm线圈,USB 5V输入,在接收器边提供1W功率.这种超紧凑无线电池充电系统主要用在可穿戴设备,智能手表,物联网(IoT)传感器和保健设备.本文介绍了无线电源系统STEVAL-ISB038V1主要特性,发送器STEVAL-ISB038V1T和接收器STEVAL-ISB038V1R主要特性,电路图和材料清单以及接收板PCB装配图.

Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications The STEVAL-ISB038V1 is a wireless battery charger reference design evaluation kit designed for ultra-compact battery operated devices, such as wearable gear, smartwatches, Internet of Things sensors and healthcare devices.

The design is optimized for 1-watt wireless power transfer with a half-bridge topology on the transmitter side and with tiny 11 mm and 20 mm coils on the receiver and transmitter sides, respectively. For power transfers up to 3 watts, the design can be modified by using larger coils and a full-bridge configuration on the transmitter.

The STWBC-WA transmitter can support a cost-effective half-bridge topology (full-bridge optional) and a powerful software API lets you modify the behavior of LED and general purpose IOs as well as connecting external peripherals or devices like sensors to the design via the on-chip I²C and UART ports.

The STWLC04 is designed for 1-watt power transfer based on the Qi protocol, with digital control and precise analog control loops ensuring stable operation. The I²C interface allows a high degree of customization and settings can be stored in the embedded non-volatile memory.

STEVAL-ISB038V1主要特性:

• Wearable KIT characteristics:
− 11 mm coil on Receiver
− 20 mm coil on Transmitter
− 1 Watt delivered on Receiver side
− USB 5 V input
− Foreign Object Detection (FOD) optional
− Graphical interface for monitoring behavior
− Total reference design
− RoHS compliant
• STWBC-WA Wireless power transmitter:
− Cost effective Half Bridge topology with integrated drivers
− Optional Full Bridge configuration for 3 W applications
− Active presence detector
− 2-layer PCB to facilitate design
− Turnkey solution or customizable via APIs
− Parametric customization via Graphical interface
• STWLC04 wireless power receiver:
− Output voltage: 5 V regulated voltage
− Integrated high efficiency synchronous rectifier
− Li-Ion/Li-Pol charger functionality
− 4-layer PCB to facilitate design

图1.1W无线电源系统STEVAL-ISB038V1外形图
无线电源发送器STEVAL-ISB038V1T

图2.STEVAL-ISB038V1T发送器控制级电路

图3.STEVAL-ISB038V1T发送器电源级电路

图4.STEVAL-ISB038V1T发送器USB到UART Dongle电路

图5. STEVAL-ISB038V1R接收器电路

图6. STEVAL-ISB038V1R接收器USB-I²C dongle电路

无线电源接收器STEVAL-ISB038V1R

The STEVAL-ISB038V1R wireless power receiver evaluation board is a reference design based on the STWLC04 device.

This receiver operates with the STWBC-WA wearable reference design (STEVAL-ISB038V1T) as a 5 V power supply or a simple CC/CV battery charger. Mode and parameter changes can be performed through the I²C bus which is easily accessible via the graphical interface.

无线电源接收器STEVAL-ISB038V1R主要特性:

NVM memory to store default configuration
a 5 V output or CC/CV charger (configurable)
overvoltage, overcurrent and overtemperature protection
a LED for power transfer progress status
an I²C connection for the user interface and for default configuration update
无线电源接收器STEVAL-ISB038V1R电性能:



图7.无线电源接收器STEVAL-ISB038V1R外形图

图8.无线电源接收器STEVAL-ISB038V1R框图
无线电源接收器STEVAL-ISB038V1R材料清单:


STEVAL-ISB038V1R (USB-I²C dongle)材料清单:

无线电源发送器STEVAL-ISB038V1T材料清单:




图9.无线电源接收器STEVAL-ISB038V1R PCB装配图
详情请见:
http://www.st.com/content/ccc/resource/technical/document/data_brief
/group0/52/3c/57/6b/ad/1a/44/f3/DM00314001/files/DM00314001.pdf/jcr:content/translations/en.DM00314001.pdf

http://www.st.com/content/ccc/resource/technical/document/user_manual
/group0/8f/bd/7a/02/3a/1b/43/51/DM00316692/files/DM00316692.pdf/jcr:content/translations/en.DM00316692.pdf

以及http://www.st.com/content/ccc/resource/technical/layouts_and_diagrams/schematic_pack/group0/7b/7e/a9/c8/2f/51/4a/7a/STEVAL-ISB038V1%20schematics/files/steval-isb038v1_schematics.pdf/jcr:content/translations/en.steval-isb038v1_schematics.pdf
http://www.st.com/content/ccc/resource/technical/document/bill_of_materials/group0/d1/ba/bd/e2/f4/a2/42/25/STEVAL-ISB038V1%20BOM/files/steval-isb038b1_bom.pdf/jcr:content/translations/en.steval-isb038b1_bom.pdf
en.DM00314001.pdf
en.DM00316692.pdf
en.steval-isb038b1_bom.pdf
en.steval-isb038v1_schematics.pdf

 
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