TSDMTX-5V-EVM - SEMTECH INTERNATIONAL

TSDMTX-5V-EVM

Wireless Charging Transmitter

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WIRELESS CHARGING

User Guide

TSDMTX-5V-EVM

Dual-Mode (Qi and PMA) Transmitter

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User Guide

TSDMTX-5V-EVM Semtech

Introduction

The Semtech TSDMTX-5V-EVM is an evaluation platform for test and experimentation of a wireless

charging transmitter based on the Semtech TS80000 Wireless Power Transmitter Controller, TS61001

Full-Bridge FET Driver, and TS31023 Linear Regulator. This evaluation module provides a complete

system solution for both Qi and PMA standards of power transmission, making this transmitter an ideal

platform for powering the majority of wireless receivers 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

TS80000 and other Semtech components.

Table of Contents

Wireless Charging Concepts .................................................................................................... 2

Product Description ................................................................................................................. 3

Standard Use .......................................................................................................................... 5

Firmware Management ............................................................................................................ 8

FOD Test ................................................................................................................................. 9

Documentation ...................................................................................................................... 10

Block Diagram ............................................................................................................ 10

Schematic .................................................................................................................. 11

Bill Of Materials “BOM” ............................................................................................... 13

Board Layout .............................................................................................................. 14

Board Layers .............................................................................................................. 15

FAQs ..................................................................................................................................... 17

Next Steps ............................................................................................................................. 18

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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

Regulation Rectifier

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.

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User Guide

TSDMTX-5V-EVM Semtech

Product Description

The TSDMTX-5V-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 transmitter may be coupled with any Qi or PMA receiver module to form a complete wireless power

transmission system. For the system designer, a likely choice might be the complementary Semtech

TSDMRX-5W-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 a number of other Semtech Receiver EVMs that support different power levels and output

voltages, any of which can be used as all support the Qi and/or PMA standard and therefore are

compatible with the TSDMTX-5V-EVM transmitter.

In addition, the evaluator can also use any existing Qi or PMA compliant product, though the limited

access these devices offer may make the range of experiments that can be performed more limited.

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 in the EVM is the Semtech TS80000 integrated circuit, which controls the system and

implements the Qi and PMA protocols. Developers can vary the supporting componentry to meet their

goals as desired.

In this user guide, an introduction will be provided to the evaluator for how to use the EVM for wireless

power transmission as well as how the TSDMRX-5W-EVM can be used in conjunction with it.

Once the system is set up and working, a selection of tests and activities will be described that the

evaluator can choose to perform.

USB For Power

And Flash

Update

LED Behavior

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The red and green LEDs on the EVM let the user know what the transmitter is doing as it operates. As

seen in the diagram below, when power is applied, the transmitter initializes as indicated by the green

LED lighting for about a half second. Next, as the transmitter searches for a nearby receiver, no LED is lit,

keeping power to a minimum in this standby state. When a receiver is located the transmitter receives

instructions on the upcoming transaction to perform. Power is then transmitted and the green LED flashes

each second indicating an ongoing charging event. During charging, if a foreign object is detected,

charging is aborted and the red LED will flash each second indicating the fault detected, and will continue

to do so until the receiver is removed from the target zone. Similarly, any other detected error will also

abort the charging process, indicated by a steady red LED that remains lit until the receiver is taken away.

Error conditions include communication errors between receiver and transmitter, and detection of excess

voltage, current, power, or temperature on the receiver or transmitter. Absent an error, charging continues

until the receiver indicates no further power is required, usually when an attached battery is fully

recharged. At this point, the transmitter enters the charge complete state, as indicated by the green LED

being lit steadily, which it continues to do until the receiver is removed from the transmitter. Whenever the

receiver is removed from the target area, the transmitter returns to the standby state, searching for

another transaction to begin.

Apply Power

Startup Sequence

Standby (ping…)

Charging

Charge Complete

if FOD

if Error

Receiver Removed

Blinking

Solid

Blinking

Solid

1/2 sec

Red

LED

Green

LED

-off -

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Standard Use

The TSDMTX-5V-EVM is easy to set up and use. Connect a USB cable from any USB port capable of

driving up to 1 amp (most PCs will suffice) to the USB port on the EVM. On application of power, the

green LED should light for about a second and then turn off. Note: you can also apply power via the J5

port from an external 5 volt power supply (not included with the EVM kit), but not when the USB cable is

in use.

At this point, the EVM is ready to transmit power. A few times each second, the transmitter emits a ‘ping’

of energy in search of a compliant receiver in range.

When in range, the receiver is powered by the ping sufficiently to be able to announce its presence to the

transmitter, and a transaction begins. The transmitter provides a small amount of power to the newly

discovered receiver, so it can tell the transmitter what its power requirements are.

At the completion of the handshake, the transmitter begins providing the requested power, indicated by a

blinking green LED. During power transfer, the receiver continuously communicates with the transmitter,

actively directing the process. In this way, it is assured that power is only sent when and how it is required

by an available and desirous receiver – and in the way that is compatible to the requirements of the

receiver. If required, a receiver can actively increase or decrease its power request, and the transmitter

will act accordingly. As such, equipment with complex charging requirements can be precisely supported

and only the desired amount of power is provided.

Once charging is completed, the LED stops blinking and displays a steady green ‘completed’ state. If at

any time an error is detected, the red LED is lit and transmission is halted. To restart, the receiver must

be removed from the range of the transmitter and returned to the target zone to start a new transaction.

Productized Receiver Test

If you have a product that is Qi or PMA compliant, simply place it on the circular target of the black plastic

antenna cover. The transmitter should demonstrate the above actions, and the device receiving power

should indicate it is taking a charge in whatever manner its users guide states. You can also perform

foreign object detection (FOD) by following the steps in the “FOD Testing” section below.

EVM Receiver Tests

Additional testing can be performed with the use of an EVM receiver module. There are a number of

Semtech Receiver EVMs that support different power levels and output voltages, any of which can be

used, as all support the Qi and/or PMA standard and therefore are compatible with the TSDMTX-5V-EVM

transmitter. In this User Guide, the TSDMRX-5V-EVM has been selected as the receiver to experiment

with. Other Semtech receiver EVMs may be used instead in a similar manner; refer to the user guide for

the selected receiver for details specific to the selected device.

In order to use the TSDMRX-5V-EVM as a target receiver, simply place the receiver over the target circle

on the transmitter EVM module. You should see the LEDs on each EVM turn green, indicating a

transaction has been established. The EVM’s purpose is to receive power; next you can decide what to

deliver that power to.

The user has a number of possible options to choose from. The optimal load to select would be a

Programmable DC Electronic Load. A ‘load box’ can easily be set to draw a selected current or power at

the turn of a knob, making them very flexible and easy to use in observing power supply operation in

general. If a load box is not available, a power resistor decade box is nearly as convenient, as it can

easily be set to any desired resistance to simulate a range of load conditions. In either case, be sure the

test load is rated for at least the amount of power being tested. If need be, a selection of power resistors

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could be used as test loads, though without the ease of modification of the prior options. Finally, any

device that uses a 5 volt input up to 5 watts of power can be used as a test load should that be desired.

Whatever load is selected, wires must be run from the VOUT+ and VOUT- pins of the receiver EVM to the

selected test load, as per the illustration below. Once the load is added, the receiver EVM can be used to

perform a variety of tests. Alternately, power can be drawn from the VBUS and GND lines of the USB port

if desired.

Status LED

Connect a DC voltmeter across the VOUT+ and VOUT- pins to monitor the voltage being output to the

load, and a DC ammeter in series with the VOUT+ line. Set levels to allow for up to 10 volts and 2 amps

to be observed.

With no load selected, place the receiver on the center of the transmitter target circle. Once transmission

begins, you should observe approximately 5 volts and 0 amperes on the meters.

Apply a variety of loads to observe performance at 1, 2, and 5 watt levels. Voltage should remain nearly

constant, and current should follow the P=V*I relationship. Experiment with the maximum power that can

be drawn before the receiver detects an overload and cuts off power. You should be able to observe on a

minor overload, the receiver will attempt to restore power by retesting the load intermittently. In the case

of a major overload, the transmitter may register an error, as indicated by a red LED on the transmitter,

which will halt further activity until the receiver is removed from the target area for several seconds before

being returned to start a new transaction.

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Observe Coil Signals

The following information is not required in order to use the EVM, as what can be observed below is

entirely managed by the Semtech TS80000 Wireless Controller. However, it allows the observer an

opportunity to see how the receiver and transmitter actively manage the wireless power process.

If you wish to observe the intrinsic wireless process, place an oscilloscope probe on one antenna lead,

with the probe ground run to the board ground (one of the fastener screws will suffice). Be sure the scope

can handle signals up to 100 volts. While the EVM power supply is only 5 volts, the antenna is part of a

resonant circuit where considerably higher voltages are developed.

To observe the search ping, apply power to the transmitter and remove the receiver from the target zone.

The scope should display a ‘chirp’ of 0.5 to 1mSec in duration with an initial peak of 10 to 20 volts. The

frequency within the envelope of the chirp is in the 100-150 kHz range, which is the normal range of Qi

and PMA systems.

Next, place the receiver on the transmitter target. With the scope set to 0.5 to 1 uSec and 10 to 20 volts

per division, you should observe a signal that is a composite of the sinusoidal power signal with a digital

‘notch’ in the sinewave which is produced by the communication between the receiver and transmitter.

Note as you vary the load and the location of the receiver on the target that the amplitude and frequency

of the coil signal changes. The greater the load, the more signal is sent to transfer the power required by

the load. Similarly, the less well coupled the receiver antenna is to the transmitter coil, the more power

must be sent to compensate for the inefficient misalignment. You may note voltages near 140 volts peak-

to-peak in the most demanding conditions.

Measure Efficiency

By measuring the power from the receiver’s VOUT+ and VOUT- pins in comparison to the power entering

the transmitter EVM, you can determine the efficiency of the power transfer through the system. The

diagram below, for EVMs similar to those used here, demonstrates efficiency is a function of output

current, and runs about 75% beyond the mid-power point, assuring good efficiency and minimal heat

dissipation concerns.

Load vs Efficiency

Output Current (A)

Efficiency

10%

20%

30%

40%

50%

60%

70%

80%

90%

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

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Firmware Management

The EVM is shipped with the most current release of the firmware at the time it was manufactured. As the

standard evolves, or enhancements are made to the board performance, updates to the firmware will be

available via your Semtech FAE.

A small utility “FW_FLASH” allows you install the latest firmware to your board, and also to interrogate the

board as to which version of the firmware is currently installed. FW_FLASH is also available via your

Semtech FAE.

Once obtained, install FW_FLASH to any desired location on your computer. If you wish to obtain the

latest firmware, obtain and install it as well.

Let Windows install an EVM Driver on your PC

- Connect a USB cable between the EVM and your PC.

- Apply power to the EVM.

- Wait for windows to indicate that it has finished loading a driver for the EVM, then unplug the EVM.

- Note: you do not need to locate a special driver for this process. Windows will select one of its own.

This operation only needs to be performed once on a given PC.

Determine the EVM Flash Revision

- To set up the EVM hardware correctly for the flash utility, start with an unpowered EVM.

- Double click on the FW_FLASH icon on your computer.

- FW_FLASH will open a window on your PC.

- Connect a USB cable between the EVM and your PC, which applies power and initiates the USB

connection.

- The revision number of the flash firmware found on the EVM will be displayed in the FW_FLASH

window.

- Close the window when you are done reviewing this information.

Updating the EVM Flash Revision

- Begin with an unpowered EVM.

- Drag the firmware file to send to the EVM onto the FW_FLASH icon.

- FW_FLASH will open a window on your PC.

- Connect the USB cable between the PC and the EVM.

- In the FW_FLASH window, the utility will indicate the progress of the flash update.

In just a few seconds should indicate the update has been completed.

- Close the window when you are done reviewing this information.

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FOD Test

In a production device, FOD testing is an important feature, in that the transmission process is constantly

inspected for the introduction of extraneous materials in the target area that could absorb the transmitted

energy and become hot. When Foreign Objects are Detected (“FOD”), the TS80000 shuts down power

transmission as a safety precaution, and indicates the detected problem by blinking the red status LED.

This process is bypassed in the receiver EVM, however, in order to allow engineers to test different

antennas and make other hardware modifications without triggering the FOD protocols and complicating

the testing process. When such hardware changes are made, the parameters of the feedback

measurements change, which the FOD protocol would perceive as a foreign object in the field, and cause

the system to shut down.

In order to test the FOD protocols, the experimenter can use as a receiver any Qi certified cell phone.

Examples of these are the Samsung Galaxy S6, Samsung Galaxy Edge, Samsung Galaxy Note+, various

LG and Google Nexus phones, and, some models of the Nokia Lumia. A more extensive list can be found

at:

http://www.wirelesspowerconsortium.com/products/?brand_name=&product_name=&type_number=&pro

duct_type=2&compliant_automotive=&sort=&direction=asc

Experiments can be run on foreign objects on receivers with and without FOD management enabled to

observe the differences. With FOD disabled, the metal object in the field will absorb some of the

transmitted energy and become warm. Using a FOD-enabled production device, power transmission will

be aborted when any significant interference in power transfer has been detected.

Once a FOD abort takes place, the transaction is terminated, as indicated by a blinking red LED. To

restart power transmission, the receiver must be removed from the target area and a new transaction

must be initiated. If the FOD is still present, the transaction will fail again, and continue to do so until the

FOD is removed from the target area.

Based on prior information and experiments, what should be expected if FOD is introduced in the target

area of an EVM that is not currently in a power transmission transaction? Why?

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Documentation

The following sections document the hardware design of the TSDMTX-5V-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-5V-EVM may be divided into a number of sub-blocks as show in the diagram below:

5 Volt

Filters

3 Volt

LDO

Bridge

FETs

FET

Driver

Controller Filters

Matching

Network

Antenna:

Transmit

5 Volt

Supply

Antenna:

Receive

FET Driver

Boost

5 Volt Filters - smooths the 5 volt input supply

FET Driver Boost - raises the 5 volt input above 6 volts for the FET drivers

Controller - based on the TS80000 Wireless Power Controller. Includes I/O: USB, I2C, Temp Sensor,

LED display

FET Driver - based on the TS61001 Full-bridge FET Driver, powers the FETs based on inputs from

controller

Bridge FETs - gates drive power from the 5v 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

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B. Schematic

Below are the schematics for the TSDMTX-5V-EVM. Annotation has been added to indicate which part of

the block diagram each component is a member of:

PGND

VBUS 1

D- 2

D+ 3

ID 4

GND 5

SHLD

Micro-B

USB

Receptacle

ZX62D-B-5P8

USBD_N

USBD_P

IO1

GND 2

IO2

IO3

V+ 5

IO4

IP4221CZ6-S,115

VCC3V3

USB data (Optional)

R51

VCCIN

22V

1.5A

The Wireless Power TX PCB can be populated in one of the following two configurations:

-- 5V DC input

-- 12V and/or 19V DC input

5V DC configuration:

-- populate block A (optional)

-- populate block B (optional)

-- populate block C (always needed for 5V)

12V/19V DC configuration:

-- populate block B (optional)

-- populate block D (always needed for 12/19V)

10uF

25V

C49

10uF

25V

C50 100nF

50V

C51 10nF

50V

C52 6.8uH

1.5A

10uF

25V

C53

PGND_JACK

VCC_JACK VCC_FLT

R48

PGND_JACK

-2DC IN

DC_IN

PGND

Controller

9v Filter

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100K

R55

VCCDRV

75K

R54

10K

R61

33pF

C62

DRV_VOLTAGE

PGND PGND

33 uH

0.37A

B0540W-7-F

10uF

16V

C61

PGND

2N7002

DRV_L

10uF

10V

C57

VCCIN

5V support

R52

VCC5VVCC5V

PGND PGND

VCC3V3

15K

R47

10K

R50

GND 1

OUTPUT 2

FB 6

INPUT

ENABLE

PAD 9

TS31023

100nF

50V

C55 10K

R46

75K

R49

Place close to the MCU 4.7uF

decoupling capacitor.

3.0V

GNDGND GND

VCC5V

2.0

R27

VCCIN

100nF

50V

C17 22uF

25V

C18

2.7nF

50V

C27

24uH

TX Inductor

1.0

R20

1.0

R17

100nF

C13 1K

R18

10nF

C15

VCC3V3A

200K

R28

4.7nF

200V

C25 14K

R12

14K

R15

33pF

C26

VCC3V3A

BAT54SW-7-F

VCC3V3

GND 2

V+ 3

IN+

IN-

OUT 6

REF 1

INA199A2

100nF

C16

ACA_VOLTAGE

DC_CURRENT

PGND

PGNDPGND AGND AGND AGND

AGND

0.020

0.1W

R19

SW1

COILA

ACA

DC_CURRENT

22uF

25V

C14

PGND

2.0

R40

100nF

50V

C32 22uF

25V

C33

2.7nF

50V

C42

PGND

PGNDPGND

SW2

VBRIDGE

R25

R29

PWM1_H

PWM1_L

VCCDRV

PGND

47nF

C22

R37

R41

PWM2_H

PWM2_L

47nF

C36

PGND

10K

R30 10K

R31

PGND

10K

R32 10K

R33

VS1 1

HO1 2

LO1 3

VCCG

PGND 5

LO2 6

HO2 7

VS2 8

VB2 9

LS1ON

10 HS1ON

LS2ON

AGND

V5INT

SDATA

SCLK

V3P3

HS2ON

COMPOUT

19 COMPN

20 COMPP

AMPN

AMPOUT

AMPP

STRTUP

SLEEP

PGOOD

VB1 28

PAD 29

TS61001

100nF

C44

4.7uF

6.3V

C41

10uF

16V

C45 100nF

C43

PGND

DRV_EN

10K

R22

PGND

1.0

R26

1.0

R39

10K

R36

25K

R35

DRV_VOLTAGE

DRV_EN

R34

DRV_CMP

BSC120N03MS G

75K

R21

10K

R23

4.7nF

C19

DC_VOLTAGE

AGND AGND

DC_VOLTAGE

2.2uH

4.2A

R24

NPC28

NPC20

NPC21

NPC23

NPC24

2.2uH

4.2A

R42

47nF 250VC35

47nF 250VC38

NPC39

NPC40

NPC29

NPC30

NPC31

TIE1

Net Tie

TIE2

Net Tie

COILB

200K

R38

4.7nF

200V

C34 14K

R56

14K

R57

33pF

C37

VCC3V3A

BAT54SW-7-F

VCC3V3

ACB_VOLTAGE

AGND AGND AGND

ACB

COILB

R44

4.7nF

200V

C46 7.5K

R58

7.5K

R60

4.7nF

C48

VCC3V3A

BAT54SW-7-F

VCC3V3

AC_MAX

AGND AGND AGND

AC_MAX

COILB

BAS21LT3G

R45

100K

R59

1nF

200V

C47

R43

AGNDAGND

COILA

Place the analog filters close to the Wireless Controller

PGND PGND PGND

PGND

VBRIDGE

PGND

VBRIDGE

PGND

Matching Network

Feedback Filtering

Antenna

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C. Bill Of Materials “BOM”

Below is a listing of the parts used in the TSDMTX-5V-EVM. An excel spreadsheet file with this

information is available on the Semtech website as an added convenience.

Designator Value Detail Manufacturer Qty

1 C1, C6, C41 4.7uF/6.3V JMK107BJ475KA-T Tayio Yuden 3

2 C14, C18, C33 22uF/25V TMK316BBJ226ML-T Taiyo Yuden 3

3 C15 10nF/50V GRM155R71H103KA88D Murata 1

4 C17, C32, C51, C55 100nF/50V GRM155R61H104KA01D Murata 4

5 C2-5, C7, C9, C10, 13,C16, C43-44 100nF/10V GRM155R61A104KA01D Murata 11

6 C22, C36 47nF/25V GRM188R71E473KA01D Murata 2

7 C27, C42 2.7nF/50V CC0603KRX7R9BB272 Yageo 2

8 C34 4.7nF/200V C1608X7S2A473K TDK 1

9 C35, C38-40 100nF/50V C3225C0G2E104J250AA TDK 4

10 C37, C62 33pF/16V C0402C0G1C330J020BC TDK 2

11 C45 10uF/16V C2012X5R1E106K085AC TDK 1

12 C46 4.7nF/200V C1608X7S2A473K TDK 1

13 C47 1nF/200V GRM188R72E102KW07D Murata 1

14 C49, C50, C53,C54 10uF/25V C2012X5R1C106K085AC TDK 4

15 C52 10nF/50V C1608X7R1H103K080AA TDK 1

16 C57,C61 10uF/16V C1608X5R1C106M080AB TDK 2

17 C8, C19, C48 4.7nF/10V C0402X5R1A103K020BC TDK 3

18 D3 APHB1608ZGSURKC Kingbright 1

19 D5, D6 BAT54SW-7-F Zetex 2

20 D7 BAS21LT3G ON Semiconductor 1

21 D8 22V SMAJ22A Bourns 1

22 D9 B0540W-7-F Zetex 1

23 F1 1.5A CQ12PF CONQUER 1

24 J5 PJ-014DH-SMT CUI 1

25 J6 ZX62D-B-5P8 Hirose 1

26 L1 600 BLM18AG601SN1D Murata 1

27 L3 6.3uH WT-505090-10K2-A11-G TDK 1

28 L5 IND_CHOKE_TAI_TECH Common Mode

Choke 1

29 L6 6.8uH/1.5A IFSC1515AHER6R8M01 Vishay 1

30 L7 33 Uh/0.37A NR3015T330M Tayio Yuden 1

31 Q1, Q2, Q3, Q4 BSC120N03MS G Infineon 4

32 Q5 2N7002LT3G On Semiconductor 1

33 R1, R46, R22-23, R30-33, R36, R50, R61 10K RC0402FR-0710KL 11

34 R10 220 10K/1% 0402 1

35 R15,R56,R57 14K 14K/1% 0402 3

36 R2,R17, R20, R26, R39 1 RC0402FR-071RL 5

37 R18, R44, R45 1K 1K/1% 0402 3

38 R19 0.020/0.1W 0.02/1% 0603 Vishay 1

39 R21, R49, R54 75K 75K/1% 0402 3

40 R3,R24, R25, R29, R37, R41, R51,R52,R42 0 0K/1% 0402 9

41 R27, R40 2 2.0/1% 0402 2

42 R34 1M 1M/1% 0402 1

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Designator Value Detail Manufacturer Qty

43 R35 25K 25K/1% 0402 1

44 R38 200K 200K/1% 0402 1

45 R47 15K 15K/1% 0402 1

46 R55, R59 100K 200K/1% 0402 2

47 R58, R60 7.5K 7.5K/1% 0402 2

48 R6 1.5K 1.5K/1% 0402 1

49 R8, R9 150

RC0402FR

07150RL 2

50 U1 IC TS80000 Semtech 1

51 U2 IC INA199A1DCKR TI 1

52 U3 IC TS61001 Semtech 1

53 U4 IC TS31023 Semtech 1

54 U5 IC IP4221CZ6-S,115 NXP 1

55 Y1 8MHz CSTCE8M00G55-

R0 Murata 1

D. Board Layout

The diagram below shows the locations of the components used in the TSDMTX-5V-EVM PCB.

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E. Board Layers

The TSDMTX-5V-EVM PCB is based on a four layer design as shown below. The ground plane in layer

two is recommended to reduce noise and signal crosstalk. The EVM placed all components on the top of

the board for easier evaluation of the system. End product versions of this design can be made

significantly smaller by distributing components on both sides of the board. The Gerber files for this

artwork can be downloaded from the Semtech web page.

Top Layer

Ground Plane

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Signal Layer

Bottom Layer

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FAQs

Q: What output voltage is provided by the TSDMTX-5V-EVM system?

A: It depends on which receiver is being used. For the TSDMRX-5V-EVM, the output would be 5 volts.

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:

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:

Prefix characters:

1+2 = Company : TS = Triune/Semtech

3+4 = Environment : DM = Dual Mode WI = Wearable Infrastructure

5+6 = Type : TX = Transmit RX = Receive

Mid-section = Device Voltage or Wattage

Suffix = Equipment type:

EVM = Evaluation Module

MOD = Production Module

Therefore, the TSDMTX-5V-EVM is a Dual Mode, 5 volt Transmitter Evaluation Module provided by

Semtech.

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 TSDMTX-19V1-

EVM is maintained there and may contain the answers you’re looking for. Your local Semtech FAE can

also assist in answering your questions.

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Next Steps

For more information on Wireless Power, go to the Semtech webpage at:

https://www.semtech.com/power-management/wireless-charging-ics/

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.

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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

Contact Information

Semtech Corporation

200 Flynn Road, Camarillo, CA 93012

Phone: (805) 498-2111, Fax: (805) 498-3804