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Wireless Charging www.semtech.com 3 of 16
User Guide Rev 0.95
TSDMTX-19V1-EVM Jan 2016 Semtech
Introduction
The Semtech TSDMRX-5V/10W-EVM is an evaluation platform for test and experimentation of a wireless
charging receiver based on the Semtech TS81000 Wireless Power Receiver communications and control unit for
wireless charging applications. TS51111 is a fully-integrated synchronous rectifier, and SC414 is 6A integrated
FET Regulator. This evaluation module provides a complete system solution for both Qi and PMA standards of
power receiver, making this reciever an ideal platform for powering the majority of wireless transmiter in use
today.
Objectives
The objective of this User Guide is to provide a fast, easy and thorough method to experiment with and evaluate
the Semtech solutions for wireless charging systems. Sufficient information is provided to support the engineer
in all aspects of adding wireless charging support to their products. Semtech offers a range of solutions to meet
the needs of a wide range of system developers. Developers are provided with all the information on how this
EVM was built as a starting point for their own designs using the TS81000 and other Semtech components.
Table of Contents
Wireless Charging Concepts ................................................................................................................................................ 4
Product Description ............................................................................................................................................................... 5
Standard Use............................................................................................................................................................................ 6
Documentation ....................................................................................................................................................................... 7
A. Schematic ................................................................................................................................................................. 7
B. Bill Of Materials “BOM” ......................................................................................................................................... 8
C. Board Layout ........................................................................................................................................................... 9
D. Board Layers .......................................................................................................................................................... 11
FAQs ......................................................................................................................................................................................... 15
Next Steps ............................................................................................................................................................................... 16
.
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TSDMTX-19V1-EVM Jan 2016 Semtech
Wireless Charging Concepts
Wireless power transfer is, essentially, a transformer. Power is provided to a primary coil which produces an
electromagnetic (EM) field. In this field, a secondary coil is placed. The EM field induces a current into the
secondary coil, providing power to whatever it is connected to.
However, unlike a conventional power transformer that operates at line frequencies and requires an iron core for
efficiency, wireless power systems are designed to operate in the 100 kHz range, and thus can perform efficiently
with an air core. As such, the primary and secondary windings, if closely spaced, can be in separate devices, the
primary being part of a transmitter and the secondary within a receiver. This implementation can also be
described as a radio broadcast process, and as such, these transformer coils can also be seen as antennas with
equal validity, and the two terms will be used interchangeably in this text.
Receiver
Transmitter
Control
Electromagnetic
Flux
Controller FET Array
Power
Supply
Switching
Supply Receiver
End
Equipment
Power
Wireless power systems differ in another major aspect from conventional transformers, in that they are
intelligently managed. A transmitter will only provide power when a receiver is present, and only produce the
amount of power requested by the receiver. In addition, the system is capable of recognizing when the
electromagnetic field has been interrupted by an unintended element, a 'foreign object', and will shut down the
transfer to prevent any significant amount of power being absorbed by anything but a proper receiver. The
intelligent management of the wireless power transmission process is achieved though the programming of the
TS80000, which first searches for a receiver. Once found, the receiver informs the transmitter of its power
requirements, and transmission begins. The system then verifies the right amount of power is being sent, and
that none is being lost to foreign objects. The receiver will continually provide ongoing requests for power to
maintain the transaction. If the requests cease, the transaction terminates. Via this protocol, even complex
charging patterns can be supported, as the transmitter can provide varying amounts of power at different times,
as requested by the receiver. Should the receiver require no further power, such as when a battery charge is
completed, it can request no further power be sent, and the transmitter will reduce its output accordingly.
Wireless power systems have been broken into three basic power categories. “Wearable” devices, such as
headsets, wrist-band devices, medical sensors, and so forth, all operate in the low power range, up to 5 watts.
Medium power devices, in the 5- to 15-watt range, include most handheld devices, such as cell phones, tablets,
and medical electronics. High power wireless systems are intended to support devices such as power tools, radio
controlled (“RC”) devices such as drones, and other equipment requiring 15 to 100 watts of power.
Wireless Charging www.semtech.com 5 of 16
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TSDMTX-19V1-EVM Jan 2016 Semtech
Product Description
TS51111 is a fully-integrated synchronous rectifier for wireless charging applications with additional integrated
components to minimize system BOM.TS81000 is a power receiver communications and control unit for wireless
charging applications. The TS81000 can support Qi compliant, PMA compliant and proprietary applications. The
TS81000 performs the necessary coding of packets to send commands to the transmitter to adjust the power
level accordingly. All the necessary function components occupy a 16mmX25mm of PCB area.
EVB Jumper introduction
1. J1 is coil connector;
2. J2 is input connector, micro-USB connector is used. Micro-USB is selected firstly when there are both
micro-USB connector input and Tx board wireless charge input.
3. J3 and J4 are output connectors in parallel, J3 is for USB output, and J4 for output current up to 2A.
4. J5,J6 is programme updated for TS51111 connector, and normally not used.
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TSDMTX-19V1-EVM Jan 2016 Semtech
Standard Use
1. Power up TSDMTX-19V1-EVM from Semtech, or any other Dual Mode(Qi+PMA) up to 15W transmitor;
2. Place Rx EVB boards on top of the Tx EVM;
3. Connect e-load to J4 between VOUT+ and GND on Rx board;
4. Set the required output current (0A-2A) with electrical loads in CC mode and start the evaluations.
Caution: maximum load transients on the output of the RX EVM should NOT exceed
5W per second. A 100% load transient is not valid in a typical application use case.
For best performance, Rx EVM should be located right in the center of Tx EVM plastic.
Measure Efficiency
By measuring the power from the receiver’s VOUT+ and VOUT- pins of the receiver in comparison to the power
entering the tramsmitter EVM, you can determine the efficiency of the power transfer through the system. The
diagram below, for the EVMs used here, demonstrates efficiency is a function of output current, and runs about
75% at beyond the mid-power point, assuring good efficiency and mimimal heat dissipation concerns.
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
90.00%
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7
efficiency
outputcurrent(A)
LoadVSefficiency
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C. Board Layout
The diagram below shows the locations of the components used in the TSDMRX-5V/10W-EVM PCB.
Designator Qty. Manufacturer Code Footprint Manufacturer
1 C3, C4, C25, C26 4 1206 1206 10uF 25V X7R
2 C1, C12 2 402 0402 220nF 25V
3 C5, C15,C21, C22, C23 5 C0603C104K5RAC7867 402 0402 100nF 50V
4 C6, C10 2 402 0402 22nF 50V
5 C7 1 402 0402 100pF 50V
6 C8 1 402 0402 1.8nF 50V
7 C13, C18 2 402 0402 1uF 6.3V
8 C16 1 402 0402 2.2nF 10V
9 C17,C24 2 402 0402 10nF 10V
10 C32 1 402 0402 4.7nF 50V
11 C33 1 402 0402 33pF 50V
12 R2,R14 2 402 0402 0R
13 R3,R12, R13, R15, R16 NP 402 NP
14 R4, R7, R8, R11, R18, R24,R25,R26,R29,R31 10 402 0402 10K
15 R20 1 402 0402 10.2K
16 R5,R33 2 402 0402 1R
17 R30,R34 2 402 0402 4.99K
18 R35 1 402 0402 20K
19 R28 1 402 0402 97.6K
20 R19 1 402 0402 57.6K
21 R32 1 402 51.1K
22 R9, R10 3 402 0402 100K
23 R17, R21 2 402 0402 75K
24 D1 1 402 0402 Green
25 R27 1 402 0402 510R
26 C14 1 603 0603 10uF 6.3V
27 C31,C36,C37 3 402 0402 1uF 10V
28 C19, C20 2 UMK107ABJ474K A-T 603 0603 470nF 50V
29 R6 1 WSL0603R0200FEA 603 0603 0.02R 0.1W
30 C28, C29, C30 3 805 0805 22uF25V X7R
31 C35 1 402 0402 330pF 10V
32 R1 1 805 0805 200R
33 C2, C9, C11 3 CGA5H2C0G1H473J 1206 or 0805 1206 47nF 50V C0G
34 J4,J5,J6 3 Connector 1×4Pin HDR HDR 1×4Pin 2.54mm
35 U4 1 IP4221CZ6-S,115 DF N1410-6N USB ESD Protection
36 L1 1 4.7uH 6A
37 U 3 1 FSU S B43L10X QF N USB Data Sw itch
38 Q1, Q2 2 DMN3404L-7 SOT23-3N N-Channel Power MOSFET
39 Q3, Q4 2 DMP2305U-7 SOT23-3N P-Channel Pow er MOSFET
40 Q5 1 2N7002 SOT23-3N N-channel Enhancement Mode Field-effect Transistor
41 U2 1 TS8 1000-QFNR UFQFPN Wireless Pow er Receiver Controller
42 J3 1 CONN_USB_A_Plug USB_A USB, Receptacle, 4 Position, Through-Hole
43 J2 1 ZX62D-B-5P8 USB_ Micro-B Micro-B USB, Receptacle, 5 Position, S MT and Trough-Hole
44 U1 1 TS5 1111-M22WCSR WCSP Synchronous Rectifier and Direct Charging IC
45 J1 1 760308103215
46 TP1,TP2,T P3,TP4,TP6,TP7,TP8,TP10,TP5,TP9 10 Test Point
47 U5 1 SC414MLTRT MLPQ-28 4X4
48 Q6 NP
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FAQs
Q: Where can I find more information on the Qi and PMA standards?
A: There are a number of websites that address this subject. A good starting point for Qi would be:
http://www.wirelesspowerconsortium.com/technology/how-it-works.html . PMA, which is now joined with
A4WP, is now called AirFuel. Information on them can be found at the following website:
http://www.airfuel.org/technologies/inductive .
Q: Does the EVM part number represent something in particular?
A: Yes. The part number is broken into a prefix, main body, and suffix, separated by dashes. The prefix is
comprised of three two letter groupings that each help define the product represented. As such, the part
number can be read as follows:
Therefore, the TSDMRX - 5V /10W– EVM is a Dual Mode, 5 volt Reciever Evaluation Module provided by Semtech,
power up to 10W.
Q: What if my questions weren’t answered here?
A: Go to the Semtech website as described on the next page. An updated FAQ for the TSDMRX-5V/10W-EVM is
maintained there and may contain the answers you’re looking for.
Prefix characters:
1+2 = Company : TS = Triune/Semtech
3+4 = Environment : DM = Dual Mode WI = Wearable Infrastructure
5+6 = Type : TX = Transmit RX = Receiver
Mid-section = Device Voltage and/or Wattage.
Suffix = Equipment type:
EVM = Evaluation Module
MOD = Production Module
Wireless Ch
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IMPORT
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Informat
informat
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