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

2018-06-07
类别:消费电子
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文章创建人 拍明芯城

原标题:ST STWBC-WA和STWLC04 1W可穿戴无线电源系统解决方案

  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:

en.steval-isb038b1_bom.pdf

en.DM00314001.pdf

en.DM00316692.pdf

en.steval-isb038v1_schematics.pdf

责任编辑:Davia

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