Wireless Charging
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User Guide
Rev 1.03
TSDMRX-19V20W-EVM Semtech
Product Description
The TSDMRX-19V20W-EVM Evaluation Module is a ready-to-use demonstration platform allowing testing of up to
20 watts of wireless power transmission using a proprietary communication protocol as well as backward
compatiblity with the industry inductive standard to charge devices at 15W or below. For 20 watts operation, the
transimitter must be be paired with Semtech’s Transmitter
TSDMTX-19V2-EVM
(firmware version should be 00.75
or newer),
which can allow a variety of experiments to easily be performed in order to learn more about the
behavior of the system.
To develop your own board, or integrate this functionality into an existing system, the EVM can be used as a
starting point for the 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 trio of Semtech integrated circuits, the TS81000, TS94033, and
TS30042. The TS81000 provides the Qi compliant communications and control for wireless receivers of up to 40+
watts. All the intelligent management of the process is handled by the TS81000. Up to 20+ watts of power acquired
from the receiver antenna is recified, converted to DC, and output at ~ 21VDC. TS94033, sense the DC current and
feedback to TS81000, the TS30042 is the final part of the process, where the output of the rectification is
converted to 19VDC for output to the system load. This EVM presents a working example of how these three
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, at the left is antenna leads and the right port can be used to provide output power to
a device. In a 31x16mm portion of the board is the receiver, indicating the size of the actual receiver system. Right
down delow is the connector for programming. Some 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-19V2-EVM can be used in conjunction with.
