EPC 9104 Bedienungsanleitung

Demonstration Board Notication

The EPC9104 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it is not

designed for compliance with the European Union directive on electromagnetic compatibility or any other such directives or regulations. As

board builds are at times subject to product availability, it is possible that boards may contain components or assembly materials that are not

RoHS compliant. Ecient PowerConversionCorporation (EPC)makesno guaranteethat thepurchased boardis100%RoHScompliant. No

Licenses are implied or granted under any patent right or other intellectual property whatsoever. EPC assumes no liability for applications

assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

EPC reserves the right at any time, without notice, to change said circuitry and specications.

EPC Products are distributed exclusively through Digi-Key.

www.digikey.com

www.epc-co.com

Renee Yawger

WW Marketing

Oce: +1.908.475.5702

Mobile: +1.908.619.9678

renee.yawger@epc-co.com

Stephen Tsang

Sales, Asia

Mobile: +852.9408.8351

stephen.tsang@epc-co.com

Bhasy Nair

Global FAE Support

Oce: +1.972.805.8585

Mobile: +1.469.879.2424

bhasy.nair@epc-co.com

Peter Cheng

FAE Support, Asia

Mobile: +886.938.009.706

peter.cheng@epc-co.com

Demonstration Board EPC9104

Quick Start Guide

15 W, 6.78 MHz Class D Wireless Power System

using the EPC2014 eGaN® FET

DESCRIPTION

The EPC9104 Wireless power demonstration system is a

class D power system capable of delivering up to 15 W into

a load operating at 6.78 MHz (Lowest ISM band). The purpose

of this demonstration system is to simplify the evaluation pro-

cess of the wireless power technology using eGaN® FETs by in-

cluding all the critical components on a single board that can

be easily connected into any existing converter. The EPC9104

wireless power system comprises four boards namely:

1) A Source Board (Transmitter or Power Amplier)

2) A Source Coil (Transmit Coil)

3) A Device Coil (Receive Coil)

4) A Device Board (Load or Receiver)

The Source board features the EPC2014 (40 V rated) enhance-

ment mode (eGaN®) eld eect transistors (FETs) in a half

bridge topology, and includes the gate driver and feedback

based phase controller that ensures operation of the system

at 6.78 MHz. The source board can also be operated using an

external oscillator or direct gate driver signals.

The Source and Device Coils are provided by WiTricity Corpo-

ration and have been pre-tuned to operate at 6.78 MHz.

The device board includes a high frequency Schottky di-

ode based full bridge rectier and output lter to deliver a

ltered unregulated DC voltage. The device board comes

equipped with various load resistances that can be manually

Manufacturer Part #

Murata GRM188R71H104KA93D

Murata GRM32DF51H106ZA01L

Diodes Inc. PD3S140-7

Linx CONREVSMA013.062

Tyco 4-103185-0-02

Stackpole CSRN2512FKR300

----

TE Connectivity 5-1622820-3

Rohm Semiconductor MCR100JZHF4220

Rohm Semiconductor MCR100JZHF2740

Rohm Semiconductor MCR100JZHF2870

Rohm Semiconductor MCR100JZHF1400

Tektronix 131-5031-00

Keystone 5015

WiTricity 190-00038-01

Figure 10: EPC9104-D Device Board Schematic

47E Load Bank

CAUTION - HOT

Output

R815

274E 1W

GND2

R816

274E 1W

GND2

R817

287E 1W

GND2

R818

287E 1W

GND2

R819

287E 1W

GND2

R820

287E 1W

GND2

R821

140E 1W

GND2

R822

140E 1W

GND2

R823

140E 1W

GND2

R803

560E 1W R804

560E 1W R805

560E 1W R806

560E 1W R807

560E 1W R808

560E 1W R809

560E 1W R810

560E 1W R811

560E 1W

J82

.1” Male Vert.

Vout

J801

.1” Male Vert.

Vout

J802

.1” Male Vert.

Vout

J803

.1” Male Vert.

Vout

J804

.1” Male Vert.

Vout

J805

.1” Male Vert.

+Z 137E Load Bank

Load Bank #2

‹

+Z 144E Load Bank

Load Bank #3

‹

+Z 144E Load Bank

Load Bank #4

‹

+Z 140E Load Bank

Load Bank #5

‹

+Z 70E Load Bank

Load Bank #6

‹

Table 4 : Bill of Materials - Device Board

Item Qty Reference Part Description

1 1 C84 100nF, 50V

2 1 C85 10uF 50V

34D80,D81,D82,D83 Schottky 40V 1A

4 1 J80 SMA vertical Socket

5 8 J81, J82, J800, J801, J802, J803, J804, J805 .1" Male Vert.

6 1 R80 300mE 1W

7 12 R800, R801, R802, R803, R804, R805, R806,

R807, R808, R809, R810, R811 560E 1W

8 3 R812, R813, R814 422E 1W

9 2 R815, R816 274E 1W

10 4 R817, R818, R819, R820 287E 1W

11 3 R821, R822, R823 140E 1W

12 1 SJ81 5mm Scope Jack

14 4 TP1, TP2, TP3, TP4 SMD probe loop

15 1 Cl2 Device Coil

Board Standos

Output Current - AmpMeter

+Z 140E Load Bank

Load Bank #1

RX Coil Connection

Kelvin Output Current

Kelvin Output Voltage

Receiver Circuit

D80

40V 1A

D81

40V 1A C85

10uf, 50V

C84

100nf, 50V

D82

40V 1A

D83

40V 1A

R80

300mE 1W

TP4

SMD Probe Loop

J80

SMA

Vertical Socket

TP3

SMD Probe Loop

R800

560E 1W

Vout

Vrect

Vrect Vrect

GND2

R812

422E 1W

GND2

R813

422E 1W

GND2

R814

422E 1W

GND2

GND2 GND2

GND2

GND2 GND2

GND2

R801

560E 1W R802

560E 1W

SJ81

5mm Scope Jack

TP1

SMD Probe Loop

TP2

SMD Probe Loop

J81

.1” Male Vert.

J800

.1” Male Vert.

‹

www.epc-co.com

programmed to specic values to determine the impact of load

resistance on the performance of the system.

Both the source and device boards come equipped with various

probe points to facilitate simple waveform measurement and ef-

ciency calculations. A complete block diagram of the system is

given in Figure 1.

For more information on the EPC2014 eGaN FET please refer to

the datasheet available from EPC at www.epc-co.com. The data-

sheet should be read in conjunction with this quick start guide.

Reverse Engineering of the Source and Device coils is prohibited

and protected by copyright law. For additional information

contact WiTricity Corp. direct or EPC for contact information.

Source Board

Source

Coil

Device

Coil

Un-Regulated

DC Output

Device

Board

Load

WiTricity

Coils

24VDC

Matching

Impedance

Network

Matching

Impedance

Network

Feedback and

Basic Control

Gate

Driver

Gate

Driver

PSU

Figure 1: Block Diagram of EPC9104 Demonstration System

ASSEMBLY PROCEDURE

Although the EPC9104 demonstration unit comes mostly pre-

assembled, the standos need to be attached to the system

prior to testing. The standos raise the boards 2 inches above

the work surface to ensure that metal work surfaces do not

interfere with the magnetic elds of the coils. Figure 2 shows

the location and allocation of the standos for the system. It

is recommended to tighten the nuts by hand to prevent over

tightening them.

If the Voltage feedback cable needs to be attached, use cau-

tion when installing as the Source Coil PCB is thin and can eas-

ily break.

When attaching the heat-sink, observe that it lies at (paral-

lel) with respect to the PCB to ensure proper contact to both

FETs and the gate driver IC. Do not over tighten the screws as

this can damage the screws, thermal interface material, and/

or the FETs.

Figure 9: EPC9104-S Source Board Schematic

Main Coil Supply

2DC - 24VDC

Gate

Driver

High Side Regulator

TX Coil Connection

R16

U50

5.0V 250mA DFN

U20

LM5113TM

R19

DNP 10k

R18

DNP 10k

Hdrv

Ldrv

5VHS

Vsup Vsup Vsup

5VHS

GUH

GLH

GLL

GUL

GND

OUT

C14

120pF, 250V

Ldvr

R402

R405

R400

2E2

R401

4E7

R404

4E7

R403

2E2

R17

C15

120pF, 250V

SWNode SWNode SWNode SWNode

SWNode

SWNode SWNode

SWNode

Hdvr

C52

100nF, 50V C53

1uF, 25V

C54

1uF, 25V

C40

10uF, 35V C41

10uF, 35V

C20

100nF, 50V Q40

40V 10A 16mohm

EPC2014

Q41

40V 10A 16mohm

EPC2014

J17

SMA Vertical Socket

SJ40

5mm Scope Jack

SJ41

5mm Scope Jack

ProbeHole

SJ42

5mm Scope Jack

C21

4.7uF, 25V

.1” Male Vert.

J44

J46

J62

.1” Male Vert.

Vsup

7.5VDC - 12VDC

Direct Gate Drive

TX Coil Voltage Feedback Connection

Control Method

1-2 = Internal Feedback

2-3 = External

Push button to start feedback control

Internal Oscillator

Coil Phase Detect

Gate Signal Generate

Delay Upper

Delay Lower

Board Standos

External

Oscillator Input

Frequency

Adjust

Control Supply Regulator Voltage Reference

J90 Vin

Hdrv

R70

2.5Vref

R71

12k

R38

100E

R32

DNP 0E

R14

150E

R73

12k

R74

1 2 VcoilFB

12k

Ldrv

U90

5.0V 250mA DFN U92

2.5V 5mA Ref

Vin 5V 5V

VCC

GND

OUT

GND

OUT

.1” Male Vert.

C94

100nF, 50V

J72

SMB Vertical Jack

C30

100nF, 50V

C33

100nF, 50V

D10

40V 30mA

C35

10nF, 50V

R30

10k

R35

4k7

R36

4k7

C34

12pF, 50V

R33

C31

47pF, 50V

U30

LT1016CS8#PBF

U31

LT1016CS8#PBF

NegDrv

PosDrv

R15

250E

R50

D11

40V 30mA

D50

40V 1A

NegDrv

Vin

C78

C32

100nF, 50V

C70

10pF 50V

C71

100nF 50V

U70

7.3728MHz CMOS Osc 5V

C90

1uF, 25V C91

1uF, 25V C92

22uF, 25V C93

22uF, 25V

C50

100nF, 50V

J10

ExtOsc

IntOsc

ACVcoilFB

100nF, 50V

Coil V

2.5Vref

SW60

SPST push button 42V 0.1A

VcoilFB

.1” Male Vert.

J61

J60

www.epc-co.com

2 inch standos 3 inch standos

Washer above PCB

Washer below PCB

Figure 2: StandoAssembly for the EPC9104Wireless System

The EPC9104 demonstration system is easy to set up and evaluate

the performance of the EPC2014 eGaN FET in a wireless power ap-

plication. Refer to Figure 3 though Figure 6 for proper connection

and measurement setup before follow the testing procedures.

The EPC9104 can be operated using any one of three alternative

methods:

a. Using the built-in phase follower controller.

b. Using an external oscillator.

c. Using direct gating signals.

a. Operation using the built-in phase follower controller

The phase follower controller uses the coil feedback voltage to

generate the gating signals that allow for precise frequency con-

trol, regardless of load. The frequency has been pre-set by EPC to

6.78 MHz.

1. Make sure the entire system is fully assembled prior to making

electrical connections.

2. With power o, connect the main input power supply bus to

+VIN (J62). Note the polarity of the supply connector.

3. With power o, connect the control input power supply bus

to +VDD (J90). Note the polarity of the supply connector.

4. Set the load to the desired value (see table for setting jumpers

or use an appropriate external load).

QUICK START PROCEDURE

Manufacturer Part #

TDK C1608C0G2E121J

-----

----- Murata GRM188R71H104KA93D

TDK C1608X5R1C475K

Murata GRM1885C1H470JA01D

Murata GRM1885C1H120JA01D

Murata GRM188R71H103KA93D

Taiyo Yuden GMK325AB7106MM-T

TDK C1608X7R1E105K

Murata GCM1885C1H100JA16D

Kemet C0603C223K3RACTU

Diodes Inc. SDM03U40-7

Diodes Inc. PD3S140-7

Tyco 4-103185-0-03

Tyco 4-103185-0-01

Tyco 4-103185-0-02

Linx CONREVSMA013.062

TE Connectivity 1-1337482-0

EPC EPC2014

Yageo RC0603FR-07150RL

Yageo RC0603JR-07240RL

Stackpole RMCF0603ZT0R00

Yageo RC0603JR-0710KL

Murata PV37Y102C01B00

Yageo RC0603JR-074K7L

Panasonic ERJ-3GEYJ101V

Yageo RC0603FR-071RL

Yageo RC0603JR-0712KL

Yageo RC0402JR-072R2L

Panasonic ERJ-3GEYJ4R7V

Tektronix 131-5031-00

C & K Components 1.14100.5030000 & 5.46167.3010209

Texas Instruments LM5113TM

Linear LT1016CS8#PBF

Microchip MCP1703T-5002E/MC

CTS CB3-3C-7M3728

National LM4125AIM5-2.5

WiTricity 190-00037-01

Table 3 : Bill of Materials - Source Board

Item Qty Reference Part Description

1 2 C14, C15 120pF 250V

C20, C30, C32, C33, C50, C52, C71,

C78, C94 100nF, 50V

3 1 C21 4.7uF, 25V

4 1 C31 47pF 50V

5 1 C34 12pF, 50V

6 1 C35 10nF, 50V

7 2 C40, C41 10uF 35V

8 4 C53, C54, C90, C91 1uF, 25V

9 1 C70 10pF 50V

10 2 C92, C93 22nF, 25V

11 2 D10, D11 Schottky 40V 30mA

12 1 D50 Schottky 40V 1A

13 2 J10, J61 3pin .1" Male Vert.

14 1 J44 1pin .1" Male Vert.

15 3 J60, J62, J90 2pin .1" Male Vert.

16 1 J71 SMA vertical Socket

17 1 J72 SMB vertical Jack

18 2 Q40, Q41 40V 10A 16mE

19 1 R14 150E

20 1 R15 240E

21 4 R16, R17, R402, R405 0E

22 3 R18, R19, R32 DNP

23 1 R30 10k

24 1 R33 1k

25 2 R35, R36 4k7

26 1 R38 100E

27 1 R50 1E

28 4 R70, R71, R73, R74 12k

29 2 R400, R403 2E2

30 2 R401, R404 4E7

31 3 SJ40, SJ41, SJ42 5mm Scope Jack

33 1 SW60 SPST push button 42V 0.1A

34 1 U20 100V eGaN Driver

35 2 U30, U31 15ns Comparator

36 2 U50, U90 5.0V 250mA DFN

37 1 U70 7.3728MHz CMOS Osc 5V

38 1 U92 2.5V 5mA Ref

39 1 Cl1 Source Coil

www.epc-co.com

5. Make sure the jumper (J61) is in the internal feedback posi-

tion (default 1-2)

6. Turn on the control supply – make sure the supply is between

7 V and 12 V range (8.5 V is recommended).

7. Turn on the main supply voltage to the required value (do

not exceed the absolute maximum voltage of 24 V on VOUT).

To ensure that the circuit starts, it is recommended to start at

8 V and increase or decrease to the desired value.

8. If the unit does not self-start in step 7, then press the start

button and hold for at least 2 seconds. Observe that the sys-

tem operates on its own once the button has been released.

Pressing the start button will connect the internal oscillator

to the feedback circuit to help establish the currents and

voltages in the system to function on its own upon release

of the start button. The internal oscillator is set to 7.372 MHz

(well above the operating point) and it may be necessary to

increase the voltage or reduce the load to start the circuit.

9. Once operational, adjust the main supply voltage and load

within the operating range and observe the output switch-

ing behavior, eciency and other parameters.

10. For shutdown, please follow steps in the reverse order. Start

by reducing the main supply voltage to 0 V followed by steps

6 through 2.

7 V – 12 VDC

3 V – 24 VDC

Lower FET Gate Oscilloscope

Lower FET

Upper FET

External

Gate Signal

(Operation

conly)

External

Oscillator

(Operation

bonly)

Upper FET Gate

Oscillatoscope Probe

Switch-node

Oscilloscope Probe

Switch-node -

hole & post

(see Notes

for details)

VIN Supply

(note polarity)

Source Coil

Connection

Coil Voltage

Feedback

(Operation

aonly)

Gate Drive and

Control Supply

(note polarity)

EPC

EFFICIENT POWER CONVERSION

Figure 3: Proper Connection and Measurement Setup for the Source Board

Figure 4: Proper Connection and Measurement Setup for the Source Coil

Mechanically

Attached

Device Coil

to these

locations

Source

Board

Connection

Coil

Voltage

Feedback

(see Notes

for details)

www.epc-co.com

• Avoid contact with the load bank surface as it can be hot when in operation.

• Never operate the system without a load or a load less than the minimum

built into the Device board as this can cause currents in the source circuit to

become very high and lead to over-current failure.

• Always make use the ammeter is connected to the load circuit when NOT

using the built-in load current shunt. An open circuit can cause currents in

the source circuit to become very high and lead to over-current and/ or over-

voltage failure.

• Do not change load jumper settings when circuit is in operation.

• Do not press the start button after the system has started and is operating on

its own when using the coil voltage feedback method.

• Never press the start button when using an external oscillator for control.

• Never disconnect any of the coils while the circuit is in operation.

• When attempting tests with multiple device loads, always make sure at least

one device load is correctly set and physically in proximity to the source coil

such that the system operates within specications.

• When conducting tests near or at full power, always monitor the temperature

of the heat-sink and matching circuit inductors to ensure that operation is

within specications.

• Never attempt to monitor, using standard oscilloscope probes, the upper gate

voltage (SJ40) simultaneously with the lower gate voltage (SJ42) with any volt-

age applied to the main circuit (J62). The oscilloscope probes will short out the

lower device and induce the possibility of a shoot-through condition for the

upper device which can lead to failure. The only exception is if the upper gate

voltage is being monitored using an approved dierential probe, however

even this method of measurement must be limited as induced stray capaci-

tances and inductances can signicantly alter the performance of the circuit

and resulting oscillations may lead to over-voltages and ultimately failure.

• Always use the supplied hardware to re-assembly the unit and never substi-

tute metal screws, nuts and washers for the nylon versions as they may induce

short-circuits into the boards.

The EPC9104 demonstration system showcases the EPC2014 eGaN

FET in a wireless application. Although the electrical performance

surpasses that for traditional Si devices, their relatively smaller

size does magnify the thermal management requirements. The

EPC9104 is intended for bench evaluation with low ambient tem-

perature and convection cooling with load power up to 10 W (the

heat-sink MUST be mounted to the board). The addition of forced

air cooling can signicantly increase the power output of this sys-

tem, but care must be taken to not exceed the absolute maximum

die temperature of 125°C.

NOTE. The EPC9104 demonstration system does not have any current or thermal

protection on board. The source coil matching inductor will also dissipate signi-

cant power at load power > 10 W and care must be taken to force air cool this induc-

tor too during operation.

GENERAL PRECAUTIONS

• Do not operate the board without a heat-sink as the FETs will overheat and fail.

• Avoid contact with the coil feedback voltage as it can be as high as 300 Vpeak.

• Do not operate the system below resonance as the load will appear capaci-

tive and the losses in the FETs will become very high and lead to thermal

failure. When testing the system at various frequencies, always start higher

than 6.78 MHz and slowly reduce the frequency, whilst monitoring the source

coil current, until the desired setting or the peak amplitude has been reached

(resonant point). Operating below this frequency is considered below resonance.

• Do not operate the system on a solid metal (or conductive) surface without

the standos provided as this will shunt the magnetic eld and lead to over-

current of the FETs.

• Do not apply magnetic materials to the coil magnetic elds as this will shift the

resonant operating points and can lead to failure.

THERMAL CONSIDERATIONS

Figure 5: Proper Connection and Measurement Setup for the Device Coil

Figure 6: Proper Connection and Measurement Setup for the Device Board

Mechanically

Attached

Source Coil

to these

locations

Device

Board

Connection

EPC

EFFICIENT POWER CONVERSION

Device Coil

Output

Voltage

(see Notes

for details)

Load

Current

(see Notes

for details)

*ONLY to be

used with

Shunt

removed

External

Load

(see Notes

for details)

Device Coil

Connection

b. Operation using an external oscillator

Using an external oscillator allows the user to specify an operating

frequency. The external oscillator voltage may be pure AC (sine or

square wave) or have a DC oset (seeTable 1 for voltage limits).

1. Prior to commencing with testing, jumper (J61) will need to

be moved from its 1-2 position (default) to position 2-3.

2. Using this method, it is not necessary to connect the source

coil feedback voltage RF cable between the source coil and

the source board

3. Make sure the entire system is fully assembled prior to making

electrical connections.

4. With power o, connect the main input power supply bus to

+VIN (J62). Note the polarity of the supply connector.

5. With power o, connect the control input power supply bus

to +VDD (J90). Note the polarity of the supply connector.

6. Set the load to the desired value (see table for setting jumpers

or use an appropriate external load).

7. Turn on the control supply – make sure the supply is between

7 V and 12 V range (8.5 V is recommended).

8. Turn on the main supply voltage starting at 0 V and increase

slowly to the required value (do not exceed the absolute

maximum voltage of 24 V on V

OUT). Observe that the system

operates.

QUICK START PROCEDURE www.epc-co.com

EPC

EFFICIENT POWER CONVERSION

Do not use

probe ground

lead

Place probe tip

in large via

Minimize loop

Ground probe

against post

* Can only be used if heat-sink has been removed and post has been installed

Figure 7: Proper Measurement of Switch Node using the hole and post

Figure 8: Typical Waveforms for VIN = 24 V (6.639 MHz) into 23 Ωload

CH1: (VOUT) Device Coil OutputVoltage – CH2: (VGS_L) Lower FET Gate Voltage

CH3: (VOUT) Switch node voltage – CH4: (IOUT) Source Coil Current

Device

Coil

Output

Switch-

Node

Source

Coil

Input

Current

Lower

Gate

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