Wireless Charging
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User Guide
Rev 2.0
TSDMRX-5W-EVM
Jun 2016
Semtech
Product Description
The TSDMRX-5W-EVM Evaluation Module is a ready-to-use demonstration platform allowing testing of
up to 5 watts of wireless power transmission compliant with the dominant industry standards – Qi and
PMA.
The receiver may be coupled with any Qi or PMA transmitter module to form a complete wireless power
transmission system. For the system designer, a likely choice might be the complementary TSDMTX-5V-
EVM, which can allow a variety of experiments to easily be performed in order to learn more about the
behavior of the system.
There are other Qi and/or PMA standard Semtech Transmitter EVMs that support different power levels
which can be used as they are compatible with the TSDMRX-5W-EVM receiver.
Those who wish to develop their own board, or integrate this functionality into an existing system can use
the EVM as a starting point for their design, as it demonstrates a working model from which to proceed.
Toward this end, all documentation for the EVM is provided to make the process as efficient as possible.
The key technology components of the EVM are a pair of Semtech integrated circuits, the TS81000 and
TS51111. The TS81000 provides the Qi/PMA compliant communications and control for wireless
receivers of up to 40+ watts. All the intelligent management of the process is handled by the TS81000.
The TS51111 is the synchronous rectifier and charging solution in the system. Up to 5 watts of power
acquired from the receiver antenna is fed to the TS51111, converted to DC, and output at 5 VDC, with
efficiencies up to 98+%. This EVM presents a working example of how these two components can be
used together to form a complete wireless power receiver solution with high efficiency, low part count and
minimized space requirements.
As seen in the photo below, the board contains a number of sections. In the center of the board is the
receiver circuit, occupying a rectangle of 17x9 mm. Surrounding it are various test points brought out for
conveniece during experimentation. The USB port can be used to provide output power to a device via a
standard USB cable. Headers J4 and J5 are used for firmware update. Key test points will be employed in
the following text; all are documented in the schematic diagram below.
In the following section, an introduction will be provided to the evaluator for how to use the EVM for
wireless power reception as well as how the TSDMTX-5V-EVM can be used in conjunction with it.
Connect
Load Here
Receiver
Circuit
Footprint
TS81000
TS51111
USB I/F
Power Out
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Antenna Leads