Semtech TSDMRX-19V20W-EVM User manual
TSDMRX-19V20W-EVM
Wireless Charging Receiver
www.semtech.com
WIRELESS CHARGING
LinkCharge™ 20 Series
User Guide
TSDMRX-19V20W-EVM
Wireless Charging
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TSDMRX-19V20W-EVM Semtech
Introduction
The Semtech TSDMRX-19V20W-EVM is an evaluation platform for test an experimentation of a wireless charging
receiver base on a suite of high efficiency Semtech ICs: the TS81000 Receiver Controller for Wireless Power
Systems, TS94033 current sense amplifier IC, an the TS30042 Current-Mo e Synchronous Buck DC/DC Converter.
This evaluation mo ule provi es a complete system solution for in uctive stan ar of wireless power transfer,
making this receiver an i eal platform compatible with the majority of wireless power systems in use to ay.
Please visit www.semtech.com to download the latest EVM software for your evaluation board.
Objectives
The objective of this User Gui e is to provi e a fast, easy an thorough metho to experiment with an evaluate
the Semtech solutions for wireless charging systems. Sufficient information is provi e to support the engineer in
all aspects of a ing wireless charging support to their pro ucts. Semtech offers a range of solutions to meet the
nee s of a wi e range of system evelopers. Developers are provi e with all the information on how this EVM
was built as a starting point for their own esigns using the TS81000 an other Semtech components.
Table of Contents
Wireless Charging Concepts ........................................................................................................................2
Product Description .....................................................................................................................................3
Standard Use ...............................................................................................................................................4
Documentation ............................................................................................................................................7
A.
Block Diagram ................................................................................................................................7
B.
Schematic .......................................................................................................................................8
C.
Bill Of Materials “BOM” ...............................................................................................................12
D.
Boar Layout ................................................................................................................................13
E.
Boar Layers .................................................................................................................................14
FAQs .......................................................................................................................................................... 5
Next Steps .................................................................................................................................................. 6
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Wireless Charging Concepts
Wireless power transfer is, essentially, a transformer. Power is provi e to a primary coil which pro uces an
electromagnetic (EM) fiel . In this fiel , a secon ary coil is place . The EM fiel in uces a current into the
secon ary coil, provi ing power to whatever it is connecte to.
However, unlike a conventional power transformer that operates at line frequencies an requires an iron core for
efficiency, wireless power systems are esigne to operate in the 100 kHz range, an thus can perform efficiently
with an air core. As such, the primary an secon ary win ings, if closely space , can be in separate evices, the
primary being part of a transmitter an the secon ary within a receiver. This implementation can also be escribe
as a ra io broa cast process, an as such, these transformer coils can also be seen as antennas with equal vali ity,
an the two terms will be use interchangeably in this text.
Receiver
Transmitter
Control
Electromagnetic
Flux
Controller FETArray
Power
Supply
Supply
Regulation Rectifier
End
Equipment
Power
Wireless power systems iffer in another major aspect from conventional transformers, in that they are
intelligently manage . A transmitter will only provi e power when a receiver is present, an only pro uce the
amount of power requeste by the receiver. In a ition, the system is capable of recognizing when the
electromagnetic fiel has been interrupte by an uninten e element, a 'foreign object', an will shut own the
transfer to prevent any significant amount of power being absorbe by anything but a proper receiver. The
intelligent management of the wireless power transmission process is achieve though the programming of the
TS81000. When intro uce to a compliant transmitter, the TSDMRX-19V20W-EVM receiver informs the
transmitter of its power requirements, an transmission begins. The receiver then verifies the right amount of
power is being sent, an that none is being lost to foreign objects. The receiver continually provi es ongoing
requests for power to maintain the transaction. If these requests cease, the transaction terminates. Via this
protocol, even complex charging patterns can be supporte , as the transmitter can provi e varying amounts of
power at ifferent times, as requeste by the TSDMRX-19V20W-EVM. Shoul the TSDMRX-19V20W-EVM require
no further power, such as when a battery charge is complete , it can request no further power be sent, an the
transmitter will re uce its output accor ingly.
Wireless power systems have been broken into three basic power categories. “Wearable” evices, such as
hea sets, wrist-ban evices, me ical sensors, an so forth - all operate in the low power range, up to 5 watts.
Me ium power evices, in the 5- to 15-watt range, inclu e most han hel evices, such as cell phones, tablets,
an me ical electronics. High power wireless systems are inten e to support evices such as power tools, ra io
controlle (“RC”) evices such as rones, an other equipment requiring 15 to 100 watts of power.
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Product Description
The TSDMRX-19V20W-EVM Evaluation Mo ule is a rea y-to-use emonstration platform allowing testing of up to
20 watts of wireless power transmission using a proprietary communication protocol as well as backwar
compatiblity with the in ustry in uctive stan ar to charge evices at 15W or below. For 20 watts operation, the
transimitter must be be paire with Semtech’s Transmitter TSDMTX-1 V2-EVM (firmware version should be 00.75
or newer), which can allow a variety of experiments to easily be performe in or er to learn more about the
behavior of the system.
To evelop your own boar , or integrate this functionality into an existing system, the EVM can be use as a
starting point for the esign, as it emonstrates a working mo el from which to procee . Towar this en , all
ocumentation for the EVM is provi e to make the process as efficient as possible.
The key technology components of the EVM are a trio of Semtech integrate circuits, the TS81000, TS94033, an
TS30042. The TS81000 provi es the Qi compliant communications an control for wireless receivers of up to 40+
watts. All the intelligent management of the process is han le by the TS81000. Up to 20+ watts of power acquire
from the receiver antenna is recifie , converte to DC, an output at ~ 21VDC. TS94033, sense the DC current an
fee back to TS81000, the TS30042 is the final part of the process, where the output of the rectification is
converte to 19VDC for output to the system loa . This EVM presents a working example of how these three
components can be use together to form a complete wireless power receiver solution with high efficiency, low
part count an minimize space requirements.
As seen in the photo below, at the left is antenna lea s an the right port can be use to provi e output power to
a evice. In a 31x16mm portion of the boar is the receiver, in icating the size of the actual receiver system. Right
own elow is the connector for programming. Some will be employe in the following text; all are ocumente
in the schematic iagram below.
In the following section, an intro uction will be provi e to the evaluator for how to use the EVM for wireless
power reception as well as how the TSDMTX-19V2-EVM can be use in conjunction with.
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Standard Use
The TSDMRX-19V20W-EVM is very easy to use. Start by applying power to the TSDMTX-19V2-EVM transmitter. A
few times each secon , the transmitter emits a ‘ping’ of energy in search of a compliant receiver in range - in this
ocument, the TSDMRX-19V20W-EVM.
Place the TSDMRX-19V20W-EVM over the target area of the transmitter EVM. The TSDMRX-19V20W-EVM is
initially powere by the ping sufficiently to be able to announce its presence to the transmitter, an a transaction
begins. The transmitter next provi es a small amount of power to the newly iscovere receiver, so the TSDMRX-
19V20W-EVM can tell the transmitter what its power requirements are.
At the completion of this han shake, the transmitter begins provi ing the requeste power, in icate by a green
LED on the receiver EVM. During power transfer, the TSDMRX-19V20W-EVM continuously communicates with the
transmitter, actively irecting the process. In this way, it is assure that power is only sent when an how it is
require by the receiver. If require by the loa , the TSDMRX-19V20W-EVM can actively increase or ecrease its
power request, an the transmitter will act accor ingly. As such, equipment with complex charging requirements
can be precisely supporte by the TSDMRX-19V20W-EVM an only the esire amount of power is provi e . If at
any time an error is etecte , transmission is halte . To restart, the TSDMRX-19V20W-EVM must be remove from
the range of the transmitter an returne to the target zone to start a new transaction.
The receiver EVM can eliver up to 20 watts of power at 19 volts to any loa the user woul like to experiment
with. For general experimentation, the optimal loa to select woul be a Programmable DC Electronic Loa . A
‘loa box’ can easily be set to raw a selecte current or power at the turn of a knob, making them very flexible
an easy to use in observing power supply operation in general. If a loa box is not available, a power resistor
eca e box is nearly as convenient, as it can easily be set to any esire resistance to simulate a range of loa
con itions. In either case, be sure the test loa is rate for at least the amount of power being teste .
Run wires from the VOUT+ an - pins of the receiver EVM to the selecte test loa , as per the illustration below.
Once the loa is a e , the receiver EVM can be use to perform a variety of tests.
Note: In-ban communication between the RX an the TX is one using loa mo ulation. At light loa s a minimum
loa is generate using R15, but that may not be enough to maintain optimal communication. An external load of
100-200mA is necessary to prevent communication dropouts.
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Connect a DC voltmeter across the VOUT+ an - pins to monitor the voltage being output to the loa , an a DC
ammeter in series with the VOUT+ line. Set levels to allow for up to 20 volts an 1.5 amps to be observe .
With no loa selecte , place the receiver on the center of the transmitter target circle. Once transmission begins,
you shoul observe approximately 19 volts an 0 amperes on the meters.
Apply a variety of loa s to observe performance at 20 watt levels. Voltage shoul remain nearly constant, an
current shoul follow the P=V*I relationship. Experiment with the maximum power that can be rawn before the
receiver etects an overloa an cuts off power. You shoul be able to observe on a minor overloa , the receiver
will attempt to restore power by retesting the loa intermittently. In the case of a major overloa , the transmitter
may register an error, as in icate by a re LED on the transmitter, which will halt further activity until the receiver
is remove from the target area for several secon s before being returne to start a new transaction.
Observe Coil Signals
The following information is not require in or er to use the EVM, as what can be observe below is entirely
manage by the Semtech TS81000 Wireless Controller. However, it allows the observer an opportunity to see how
the receiver an transmitter actively manage the wireless power process.
If you wish to observe the intrinsic wireless process, place an oscilloscope probe on the antenna lea s, with the
probe groun run to the boar groun . Be sure the scope can han le signals up to 200 volts. While the EVM power
output is only 19 volts, the antenna is part of a resonant circuit where consi erably higher voltages are evelope .
Place the receiver on the transmitter target. With the scope set to 0.5 to 1 uSec an 10 to 20 volts per ivision, you
shoul observe a signal that is a composite of the sinusoi al power signal with a igital ‘notch’ in the sinewave
which is pro uce by the communication between the receiver an transmitter. Note as you vary the loa an the
location of the receiver on the target that the amplitu e an frequency of the coil signal changes. The greater the
loa , the more signal is sent to transfer the power require by the loa . Similarly, the less well couple the
receiver antenna is to the transmitter coil, the more power must be sent to compensate for the inefficient
misalignment.
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Measure Efficiency
By measuring the power from the receiver’s VOUT+ an - pins in comparison to the power entering the transmitter
EVM, you can etermine the efficiency of the power transfer through the system. For the EVMs use
here(TSDMRX-19V20W-EVM on TSDMTX-19V2-EVM), the iagram below emonstrates that efficiency is a function
of output current, an runs about 85% at higher power levels, assuring goo efficiency an minimal heat
issipation concerns.
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Documentation
The following sections ocument the har ware esign of the TSDMRX-19V20W-EVM. This information can be use
to better un erstan the functionality of the esign, as well as assist in creating your own har ware solution base
on this esign.
A. Block Diagram
The TSDMRX-19V20W-EVM may be ivi e into a number of sub-blocks as show in the iagram:
Antenna: Transmit – power source riving the receiver EVM (in this ocument: part of the TSDMTX-19V2-EVM).
Antenna: Receive – coil of wire place in proximity to the transmit antenna to power the EVM receiver system.
Also inclu es zero-crossing etection an over-voltage protection circuitry.
Rectification&Modulation – full wave Rectifier Bri ge.
Current Sense – low power low offset current sense aplifier IC base on the TS94033.
Controller – base on the TS81000 High Efficiency Receiver Controller for Wireless Power Systems. The TS81000
collects voltage, current, an temperature fee back signals from the receiver system, controls the actions.
DC/DC Converter – base on the TS30042 Switching frequencies 1MHz, 2A Current-Mo e Synchronous Buck
DC/DC Converter, which converts 19VDC at up to 1.1 amperes for use by the user-selecte user of the receive
power.
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B. Schematic
Below are two copies of the schematic. The first, annotation has been a e to in icate which part of the block
iagram each component is a member of. The secon will allow better use in print-out form, as the lan scape
orientation allows a larger image to be provi e .
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EN_LOAD
VSW 1
VCC
2
VCC
3
GND 4
FB 5
PG
8EN
9
BST 10
VCC
11
VSW 12
VSW 13
PGND 14
PGND 15
VSW 16
PAD 17
U4
TS30042-M000QFNR
100nF
50V
C25
10K
R20
47nF
C22
205K
R18
VOUT
I_LIMIT 10K
R22
100nF
10V
C30 100K
R23
PDC
EN_LOAD
22nF
50V
C18
NP
C13
VAC1
VAC2
1nF
50V
C12
47nF 50V
C6
VAC2
100K
R16
VAC1
EN_MOD2
0.04
1%
R11
PDC
47nF 50V
C11
10nF 50V
C15
AC 1
AC 2COIL
J3
24uH
100K
R17
EN_MOD1 MIN_LD1
500
R14
PDC
100nF
50V
C9
PGND PGND PGND
PGND
PGND
PGND
PGND
PGND
ZERO_CROSS
MIN_LD1EN_MOD1
DC_CURRENT
10K
R19
PGND
TP1
PDC
TP2
VAC1
4.7uH
2.6A
L1 VOUT
1
VOUT
2
GND
3PWR
GND
4
J4
19V OUT
10K
R13
ZERO_CROSS
4.7nF
50V
C20
22nF
50V
C19 4.7nF
50V
C21
EN_MOD2
PGND PGND PGND PGND PGND PGND
Q2 Q3 Q4 Q5 Q6
Q1
2K
R15
PDC
10uF
50V
C7 10uF
50V
C8
10uF
50V
C23 10uF
50V
C24
PGND GND
TIE2
TIE1
NP
Q8
PGND
10K
NP
R21
VOUT_HI
VOUT_HI
10uF
25V
C26 10uF
25V
C27 10uF
25V
C28 10uF
25V
C29
TP3
VAC2
VCC3V3
D7
VSS 4
VDD 5
INP
7
INM
6OUT 8
VOS_REF
1
EN
2
VDDR 3
U3
TS94033
1K
R12
100nF
C16
DC_CURRENT
10nF
10V
C17
GND
VCC3V3
100nF
C14 10nF
10V
C10
D5 D6
VCC3V3
D3 D4
MIN_LD2
PGND
MIN_LD2 Q7
TIE3
GND
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VOUT
75K
R7
10K
R9
100K
R8
10K
R10
PDC
GND GND GND GND
DC_VOLTAGE PDC_VOLTAGE
100nF
C5
100nF
C4
RESET
DEBUG/LEDG
VCC 1
RESET 4
DEBUG GND 3
DEBUG 2
J2
Debug
150
R1
10nF
10V
C2 EN_MOD1
RESET
ZERO_CROSS
SMB_SDA
SMB_SCL
EN_LOAD
PDC_VOLTAGE
NRST
1
GPIO1
2
GPIO2
3
VSS
4
LDO
5VDD
6
GPIO3
7
GPIO5 8
GPIO4 9
VACDET 10
VREF 11
SCL 12
SDA 13
EN_MOD 14
DEBUG
15
GPIO6 16
AMUX 17
EN_LOAD 18
GPIO7 19
LED 20
U2
TS81000
DEBUG/LEDG DC_VOLTAGE
GND
1uF
6.3V
C3
VCC3V3
18K
R3
10K
R4
GND 1
OUTPUT 2
FB 6
INPUT
7
ENABLE
8
PAD 9
U1
TS31223
22K
R2
PDC
5.1V
D1
GND
10uF
6.3V
C1
VCC3V3
EN_MOD1
EN_MOD2
ZERO_CROSS
DC_CURRENT
MIN_LD1
EN_LOAD
I_LIMIT
VOUT_HI
VCC3V3
1 2
3 4
D2
LEDR
I_LIMIT
DC_CURRENT
EN_MOD2
VOUT_HI
MIN_LD1
VCC 1
SDA 2
SCL 3I2C
GND 4
J1
I2C
10K
R5 10K
R6
SMB_SCL
SMB_SDA
VCC3V3
MIN_LD2
MIN_LD2
2.2K
R24
GND
100nF
C31
1
32
U5
SC431 1%
GND
VREF
VCC3V3
VREF
DEBUG/LEDG
PGND
PGND
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C. Bill Of Materials “BOM”
Below is a listing of the parts use in the TSDMRX-19V20W-EVM. An excel sprea sheet file with this information is
available on the Semtech website as an a e convenience.
Designator Description Value Footprint Manufacturer ManufacturerCode Quantity
1
C1
Capacitor
Cap 10uF 6.3V
CAPC0402L
1
2
C2, C10, C17
Capacitor
Cap 10nF 10V
CAPC0402L
3
3
C3
Capacitor
Cap 1uF 6.3V
CAPC0402L
1
4
C4, C5, C14, C16, C31
Capacitor
Cap 100nF 10V
CAPC0402L
5
5
C6, C11
Capacitor
Cap C0G 47nF 50V
CAPC1206-0805N
TDK
CGA5H2C0G1H473J
2
6
C7, C8, C23, C24
Capacitor
Cap X7R 10uF 50V
CAPC1210N
Tayio Yu en
UMK325AB7106MM-T
4
7
C9
Capacitor
Cap 100nF 50V
CAPC0402L
1
8
C12
Capacitor
Cap 1nF 50V
CAPC0402L
1
9
C13
Capacitor
Cap NP
CAPC0402L
1
10
C15
Capacitor
Cap C0G 10nF 50V
CAPC1206-0805N
TDK
1
11
C18, C19
Capacitor
Cap 22nF 50V
CAPC0402L
2
12
C20, C21
Capacitor
Cap 4.7nF 50V
CAPC0402L
2
13
C22
Capacitor
Cap 47nF 50V
CAPC0402L
1
14
C25
Capacitor
Cap 100nF 50V
CAPC0402L
Kemet
C0603C104K5RAC7867
1
15
C26, C27, C28, C29
Capacitor
Cap X7R 10uF 25V
CAPC1206N
Taiyo Yu en
TMK316B7106KL-TD
4
16
C30
Capacitor
Cap 100nF 10V
CAPC0402L
Kemet
C0603C104K5RAC7867
1
17 D1 Zener Dio e
5.1V
SOD523-L ON
Semicon uctor
MM5Z5V1T1G 1
18
D2
LED Dual Color
APHB1608ZGSURKC
LED_APHB1608
Kingbright
1
19
D3, D4, D5, D6
Schottky Dio e
DB2141200L
DIODE-SMini2
Panasonic
DB2141200L
4
20
D7
Schottky Dio e
BAS40-02V-V-G-08
SOD523-L
Vishay
BAS40-02V-V-G-08
1
21 J3 Coil connector, 2
contacts, sol er pa s
24uH
Abracon AWCCA-RX350300-101 1
22
J4
Power connector
19V OUT
CON_Pins_4p
1
23
L1
In uctor
4.7uH 2.6A
IND_NRS5030
Taiyo Yu en
NRS5030T4R7MMGJV
1
24 Q1, Q2, Q3, Q4, Q5,
Q6, Q7
N-Channel Power
MOSFET DMN62D0LFD-7
DFN80P120X120-3 Dio es, Inc. DMN62D0LFD-7 7
25 Q8 N-Channel Power
MOSFET
DMN62D0LFD-7 NP
DFN80P120X120-3 Dio es, Inc. DMN62D0LFD-7 1
26
R1
Resistor
Res 150
RESC0402L
1
27
R2
Resistor
Res 22K
RESC0603L
1
28
R3
Resistor
Res 18K
RESC0402L
1
29 R4, R5, R6, R9, R10,
R13, R19, R20, R22
Resistor
Res 10K
RESC0402L 9
30
R7
Resistor
Res 75K
RESC0402L
1
31
R8, R16, R17, R23
Resistor
Res 100K
RESC0402L
4
32
R11
Current Sense Resistor
0.04 1%
RESC0603L
Vishay
WSL0603R0400FEA18
1
33
R12
Resistor
Res 1K
RESC0402L
1
34
R14
Resistor
Res 500
RESC1206N
1
35
R15
Resistor
Res 2K
RESC1206N
1
36
R18
Resistor
Res 205K
RESC0402L
1
37
R21
Resistor
Res NP
RESC0402L
1
38
R24
Resistor
Res 2.2K
RESC0402L
1
39 U1 Linear Regulator
TS31223
DFN50P200X200-
8V6-165N
Semtech TS31223 1
40 U2 Wireless Power
Receiver Controller
TS81000
UFQFPN50P300X30
0-20VL
Semtech TS81000-2YA0060 1
41 U3 Current Sense
Amplifier
TS94033
SC70-8N Semtech TS94033SKTRC 1
42 U4 Buck DC/DC Converter
TS30042-M000QFNR
QFN50P300X300-
16V6-165N
Semtech TS30042-M000QFNR 1
43 U5 Programmable
Precision Reference
SC431 1%
SOT23-3N Semtech SC431CSK-1TRT 1
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D. Board Layout
The iagram below shows the locations of the components use in the TSDMRX-19V20W-EVM PCB. Note especial-
ly that the majority of the boar area is evote to pinouts for testability, an that the actual circuit implementa-
tion footprint is 16mm x 31mm.
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E. Board Layers
The TSDMRX-19V20W-EVM PCB is base on a four layer esign as shown below. The groun plane in layer two is
recommen e to re uce noise an signal crosstalk. The EVM place all components on the top of the boar for
easier evaluation of the system. En pro uct versions of this esign can be ma e significantly smaller by
istributing components on both si es of the boar . The Gerber files for this artwork can be ownloa e from the
Semtech web page.
Top Layer Ground Plane
Signal Layer Bottom Layer
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FAQs
Q: What output voltage is provi e by the TSDMRX-19V20W-EVM system?
A: 19 volts, at up to 20 watts total power.
Q: What mo e oes the TSDMRX-19V20W-EVM operate in?
A: The receiver operates with in sutive proprietary signaling on Semtech 19V2 (TSDMTX-19V2-EVM) transmitters.
Q: Where can I fin more information on the Qi an PMA stan ar s?
A: There are a number of websites that a ress this subject. A goo starting point for Qi woul be:
http://www.wirelesspowerconsortium.com/technology/how-it-works.html .
PMA, which is now joine with A4WP, is now calle AirFuel. Information on them can be foun at the following
website: http://www.airfuel.org/technologies/in uctive.
Q: Does the EVM part number represent something in particular?
A: Yes. The part number is broken into a prefix, main bo y, an suffix, separate by ashes. The prefix is comprise
of three two letter groupings that each help efine the pro uct represente . As such, the part number can be rea
as follows:
Prefixcharacters:
1+2= Company: TS=Triune/Semtech
3+4= Environment : DM= Dual Mode WI=WearableInfrastructure
5+6=Type: TX=Transmit RX= Receive
Mid-section = DeviceVoltageand/orWattage
Suffix= Equipment type:
EVM= Evaluation Module
MOD= Production Module
Therefore, the TSDMRX–5V/10W–EVM is a Dual Mo e, 5Volt, 10 Watt Receiver Evaluation Mo ule provi e by
Semtech.
Q: What if my questions weren’t answere here?
A: Please visit the Semtech website as escribe on the next page. An up ate FAQ as well as latest firmware for
the TSDMRX-19V20W-EVM is maintaine there an may contain the answers you’re looking for. Your local
Semtech FAE can also assist in answering your questions.
Wireless Charging
www.semtech.com
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Next Steps
For more information on Wireless Power, go to the Semtech webpage at:
http://semtech.com/wireless-charging
You may also scan the bar code to the right to go to the above web page:
There you can find the downloadable copies of the schematic, BOM, and board artwork, as well as
additional information on how to obtain Semtech wireless power products, from the chip level all the way
to complete board modules, as your needs require.
Wireless Charging
www.semtech.com
17 of 17
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TSDMRX-19V20W-EVM Semtech
IMPORTANT NOTICE
Information relating to this product and the application or design described herein is believed to be reliable, however
such information is provided as a guide only and Semtech assumes no liability for any errors in this document, or for
the application or design described herein. Semtech the latest relevant information before placing orders and should
verify that such information is current and complete. Semtech reserves the right to make changes to the product or
this document at any time without notice. Buyers should obtain warrants performance of its products to the
specifications applicable at the time of sale, and all sales are made in accordance with Semtech’s standard terms
and conditions of sale.
SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE
IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS, OR IN NUCLEAR APPLICATIONS IN WHICH THE
FAILURE COULD BE REASONABLY EXPECTED TO RESULT IN PERSONAL INJURY, LOSS OF LIFE OR SEVERE
PROPERTY OR ENVIRONMENTAL DAMAGE. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS
UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use
Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its
officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney
fees which could arise.
The Semtech name and logo are registered trademarks of the Semtech Corporation. All other trademarks and trade
names mentioned may be marks and names of Semtech or their respective companies. Semtech reserves the right to
make changes to, or discontinue any products described in this document without further notice. Semtech makes no
warranty, representation or guarantee, express or implied, regarding the suitability of its products for any particular
purpose. All rights reserved.
© Semtech 2015
Contact Information
Semtech Corporation
200 Flynn Road, Camarillo, CA 93012
Phone: (805) 498-2111, Fax: (805) 498-3804
www.semtech.com
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