STEVAL-ISB038V1:1 W wearable wireless power system based on STWBC-WA and STWLC04

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.

Key Features

  • 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
Product Specifications
DescriptionVersionSize
DB2997: 1 W wearable wireless power system based on STWBC-WA and STWLC043.0711 KB
Application Notes
DescriptionVersionSize
AN4900: How to tune STEVAL-ISB038V1 wireless charging evaluation kit for wearable applications2.01 MB
User Manuals
DescriptionVersionSize
UM2098: Getting started with the STEVAL-ISB038V1R wearable wireless power receiver based on STWLC043.02 MB
UM2099: Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications2.019 MB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISB038V1 gerber files1.1707 KB
Bill of Materials
DescriptionVersionSize
STEVAL-ISB038V1 BOM1.1173 KB
Schematic Packs
DescriptionVersionSize
STEVAL-ISB038V1 schematics1.1929 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Evaluation Tool Software
Part NumberManufacturerDescription
STSW-ISB038RGUISTGraphical user interface for STEVAL-ISB038V1R wearable wireless power receiver evaluation board based on STWLC04
Solution Evaluation Tools
Part NumberManufacturerDescription
STEVAL-ISB038V1RST1 W Wearable wireless charger receiver based on STWLC04
STEVAL-ISB038V1TST1 W wearable wireless power transmitter based on STWBC-WA
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-ISB038V1STWBC-WA; STWLC041121NEC3A991A2ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISB038V1CARDIndustrialEcopack2
1 W wearable wireless power system based on STWBC-WA and STWLC04 STEVAL-ISB038V1
How to tune STEVAL-ISB038V1 wireless charging evaluation kit for wearable applications STEVAL-ISB038V1R
Getting started with the STEVAL-ISB038V1R wearable wireless power receiver based on STWLC04 STEVAL-ISB038V1R
Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications STEVAL-ISB038V1T
Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications STEVAL-ISB038V1
Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications STEVAL-ISB038V1
Wireless charger transmitter evaluation board based on STWBC-WA for wearable applications STEVAL-ISB038V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2