STEVAL-ISB038V1 Datasheet, PDF (1/9 Pages) STMicroelectronics – 1 W wearable wireless power system based on STWBC-WA and STWLC04

STEVAL-ISB038V1
1 W wearable wireless power system based on STWBC-WA and
STWLC04
Data brief
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
Description
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.
November 2016
DocID029584 Rev 3
For further information contact your local STMicroelectronics sales
office
1/9
www.st.com