User Guide
Rev 2.0
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TSDMTX-19V3-EVM
May-18
Semtech
Documentation
The following sections document the hardware design of the TSDMTX-19V3-EVM. This information can be used
to better understand the functionality of the design, as well as assist in creating your own hardware solution
based on this design.
A.
Block Diagram
The TSDMTX-19V3-EVM
may be divided into a number of sub-blocks as shown in the diagram below:
19 Volt Supply
- the external ‘brick’ that converts AC power to 19 volts
5 Volt Buck
– based on the TS30011, converts 19 vdc to 5 vdc
Controller
– based on the TS80003 Wireless Power Controller. Includes I/O: USB, I2C, Temp Sensor, LED display
FET Driver
– based on the TS61002 Full-bridge FET Driver, powers the FETs based on inputs from controller,
supply 3Vcc for Controller
Bridge FETs
– gates drive power from the 19v supply to drive the resonant tank circuit (antenna)
Matching Network
– array of capacitors to create the resonant tank along with the antenna
Antenna: Transmit
– acts as the primary of an air-core transformer in conjunction with the receiver antenna.
Filters
– adapt the antenna and drive values for use as feedback input to the controller, TS94033 as the current
amplifier.
