Epc Epc9144 User manual

Development Board

EPC9144

Quick Start Guide

EPC2216

15 V High Current Pulsed Laser Diode Driver

Revision 1.0

QUICK START GUIDE Demonstration System EPC9144

DESCRIPTION

The EPC9144 development board is primarily intended to drive laser

diodes with high current pulses with total pulse widths as short as 1.2 ns

and currents of up to 28 A. The board is designed around the EPC2216

enhancement mode (eGaN®) eld eect transistor (FET). The EPC2216

is an AEC-Q101 automotive qualied 15 V FET capable of current pulses

up to 28 A. The EPC9144 ships with the EPC9989 interposer board. The

EPC9989 is a collection of break-away 5 mm x 5 mm square interposer

PCBs with footprints for dierent lasers, RF connectors, and a collection

of other footprints designed for experimentation with dierent loads.

The use of the interposers allows many dierent lasers or other loads to be

mounted while still being able to use the EPC9144. Laser diodes or other

loads are not included, and must be supplied by the user.

The EPC9144 comprises a ground-referenced EPC2216 eGaN FET driven

by a Texas Instruments LMG1020 gate driver. The printed circuit board

is designed to minimize the power loop inductance while maintaining

mounting exibility for the laser diode or other load. It includes multiple

on-board passive probes for voltages, and is equipped with MMCX con-

nections for input and sensing. In addition, the board includes a narrow

pulse generator capable of sub-nanosecond operation, or the user can

simply feed the gate drive directly via removal of a resistor. As shipped,

the board is designed to operate from 3.3 V logic, but is equipped with

both a logic level translator and a dierential receiver to accommodate

dierent use cases. Finally, the board can also be used for other applica-

tions requiring a ground-referenced eGaN FET, e.g. Class E ampliers or

similar. A complete block diagram of the circuit is given in gure 1, and a

detailed schematic in gure 4.

For more information on the EPC2216 eGaN FETs, please refer to the data-

sheet available from EPC at www.epc-co.com. The datasheet should be

read in conjunction with this quick start guide.

SETUP AND OPERATION

Development board EPC9144 is easy to set up to evaluate the perfor-

mance of the EPC2216 eGaN FET. Refer to Figure 2 for proper connect and

measurement setup and follow the procedure below:

1. Review laser safety considerations. Observe all necessary laser safety

requirements including the use of personal protection equipment

(PPE) as required. Refer to qualied safety personnel as necessary.

2. With power o, install laser diode U2 or other load. The use of one of

the interposers from the included EPC9989 may be used to mount the

laser or other load, and this is discussed in the section LASER DIODE

AND LOAD CONSIDERATIONS for further information.

3. With power o, connect the input power supply bus to +VBUS (J1) and

ground / return to –VBUS (J1) or GND.

4. With power o, connect the logic supply (7-12 V VDC) to +VLogic (J2)

and ground return to –VLogic (J2) or GND.

5. With power o, connect the signal pulse generator to the input J5. J5

is terminated with 50 Ω on the EPC9144, and is designed for a 3.3 V

logic input as shipped. This can be changed as discussed in this guide.

6. Connect the remaining measurement MMCX outputs to an oscil-

loscope, using 50 Ω cables and with the scope inputs set to 50 Ω

impedance. See section MEASUREMENT CONSIDERATIONS for more

information, including the attenuation values for each output.

Table 1: Performance Summary (TA= 25°C) EPC9144

Symbol Parameter Conditions Min Nom Max Units

VLogic

Gate drive and

logic supply 6 12 V

VBUS

Bus input voltage

range 0

12*

ZIN Input impedance J5 input 50 Ω

VINPUT Input pulse range 0

TPin Input pulse width 1 ns

7. Turn on the logic supply voltage to a value within the specication.

8. Turn on the bus voltage to a value within the specication.

9. Turn on the pulse source and observe switching operation via the

outputs and any additional desired probing. Laser diode output

may be observed with an appropriate electro-optical receiver.

10. Once operational, adjust the bus voltage, input pulse width, and

pulse repetition frequency (PRF) as desired within the operating

range and observe the system behavior.

11. For shutdown, please follow steps in reverse.

NOTE: When measuring the high frequency content switch node, care must be

taken to avoid long ground leads. Measure the switch node by placing the

oscilloscope probe tip through the large via on the switch node (designed for this

purpose) and grounding the probe directly across the GND terminal provided.

See EPC measurement applications note.

SAFETY WARNING: This board is capable of driving laser diodes to generate high

peak power optical pulses. Such pulses are capable of creating permanent vision

damage. User must follow proper laser safety procedures to prevent vision damage.

Figure 1: Block diagram of EPC9144 development board

CAP (J6)

VOUT (J7)

VGS

(J10)

VGS

(J9)

Input (J5)

V7in +

–

Dclmp

VBUS

–

Narrow pulse

generator

(optional)

LDO

QUICK START GUIDE Demonstration System EPC9144

Figure 2: Connection and measurement setup

OPERATING PRINCIPLE

THE EPC9144 is intended as both a demonstration board and a exible

development platform. It is functional out of the box, but is designed

to be easily modied to accommodate a broad range of applications.

It is highly recommended that the user read the entire guide, but

especially the section MODIFICATIONS, in order to get maximum

value from the EPC9144.

The EPC9144 is shipped as a rectangular pulse laser diode driver. Please

refer to the block diagram (Fig. 2) and the schematics (Figures 7 & 8).

It has several possible modications (section MODIFICATIONS), but only

the basic operation will be covered in this section. The EPC9144 basic

operating principle is to act as a current gate to allow current from the

voltage bus to ow through the laser diode or other load when the FET

Q1 is turned on, and stop the load current when the Q1 is turned o.

The speed of the driver and FET means that turn-on and turn-o can be

accomplished as fast as 500 ps and 250 ps, respectively, even for load

currents of approximately 10 A.

The FET Q1 is controlled via an input pulse that is delivered to MMCX

connector J5, which is terminated on the demo board with 50 Ω. J5 is

followed by a logic level translator. As shipped, the level translator is set

for 3.3 V logic levels, but the EPC9144 may be modied to accommodate

other logic levels (See MODIFICATIONS for further details).

After the level translator, the input pulse goes through a narrow pulse

generator circuit. The input pulse should be set > 10 ns longer than the

desired output pulse. As shipped, the pulse width is set to approximately

5 ns, but it may be adjusted to values in the range of 1.2 ns to 20 ns via

trimpot P1, with the lower limit determined by the LMG1020 gate driver IC.

Please note that it is possible to reduce the adjust the input pulse to a

value below the minimum pulse width capability of the LMG1020 gate

driver. In this case, the output will fail to function properly, and the P1

adjustment must be increased. Finally, in the case where one wishes to

control the pulse width externally via the input pulse, the narrow pulse

generator may be bypassed as discussed in the section MODIFICATIONS.

When the input goes high, the gate driver turns on Q1, allowing current

ow through the laser diode or load U2. After the narrow pulse generator

output goes low, Q1 turns o. If there is current remaining in the power

loop inductance, diode-connected EPC2036 FET Q2 can conduct and

help prevent overvoltage of the laser and FET.

The voltage bus for the laser diode or other load is bypassed via the

capacitor bank {C22, C23, C24, C25}. This capacitor bank is part of the

main power loop inductance, and the layout is designed to minimize

the eect of resulting parasitic inductance. The capacitor bank is fed

through a relatively small resistance formed by {R10, R11, R12, R13}.

The resistance served to limit the laser or load current continuous value

in the case of long pulses, and also serves to damp parasitic resonance

of the power loop.

Measurements of key waveforms can be made through the MMCX test

points provided. These test points can provide waveform measurements

with equivalent bandwidths > 3 GHz. As a result, they have requirements

and properties that dier from most conventional oscilloscope

probes. More details on the usage of these test points is provided in

section MEASUREMENT CONSIDERATIONS.

LASER DIODE OR LOAD CONSIDERATIONS

The EPC9144 can be used as is to mount a laser diode or other load.

Figure 3 highlights the output pad locations. However, many laser

suppliers have dierent mounting footprints, making it dicult to

optimize the performance of the driver and still maintain the desired

exibility. The use of an interposer PCB provides a solution to this

problem with a small added performance penalty in the form of an

additional 50 pH to 100 pH power loop inductance. The EPC9144 ships

with the EPC9989 interposer PCB, shown in Fig. 4. The EPC9989 has

an assortment of 5 mm square interposer PCBs that can be snapped

o the board. These interposers have various footprints on the top

side that can accommodate several surface mount laser diodes, an

MMCX connector, and several patterns designed to accommodate a

wide variety of possible loads. These interposers mount between the

EPC9144 and the laser diode or other load. The EPC9989 is updated

as new lasers or loads become available, so Fig. 4 may not show the

latest board.

V7in VBUS

Note

Polarity

Signal Generator

Laser

diode

or load

Pulse width

adjust

BUS

Note polarity

Signal generator Oscilloscope

(50 Ωinputs)

– +

+ –

Figure 3: Output terminals of the EPC9144

Laser anode

Laser cathode

(FET drain)

GND (for alternate

applications)

QUICK START GUIDE Demonstration System EPC9144

Figure 4: EPC9989 interposer. Note that this board is revised as needed to accommodate

new lasers and other loads as needed, so the picture may not show the latest revision.

Figure 5: Laser diode mounting on output terminals with interposer

Figure 5 shows an example of an Excelitas SMD laser diode mounted

with one of the interposers.

Finally, a ground pad is made available for those who wish to use the

board for alternative applications.

The recommended procedure for the use of the interposer is the following:

1. Apply solder paste to the U2 pads on the EPC9144 PCB.

2. Apply solder paste to the appropriate pads on the top side of the

interposer.

3. Carefully place the desired interposer with the bottom side facing the

top side of the EPC9144 on the U2 footprint.

4. Place the laser diode or desired load on the interposer.

5. Reow the entire assembly with the recommended temperature

prole for the solder used. The use of a reow oven that can meet the

recommended soldering specications is highly recommended. Other

reow methods may also be used based on the experience of the user.

The power loop inductance, including that of the laser diode, is a primary

factor that determines the shape of the laser pulse. Considerable eort

has been made to minimize power loop inductance while maximizing

the choice of laser diode and its orientation. The discharge caps, laser

diode or other load, and the eGaN FET must all be mounted in close

proximity to minimize inductance. As a result, the user must take care not

to damage any components when mounting the laser or changing other

components in the power loop.

The EPC9144 is capable of driving laser diodes with current pulses

can result in peak powers of several tens of watts of optical power.

Laser diodes for lidar applications may be designed with this in mind, but

thermal limitations of the laser package mean that pulse widths, duty

cycles, and pulse repetition frequency limitations must be observed.

Read laser diode data sheets carefully and follow any manufacturers’

recommendations.

MEASUREMENT CONSIDERATIONS

MMCX jacks are provided to measure several voltages in the circuit,

including gate drive input, Q1 gate voltage, Q1 drain voltage, charge

voltage of the energy storage cap. All measurement points are designed

to be terminated in 50 Ω, hence when viewing waveforms, the

oscilloscope inputs should be set to a 50 Ω input. Ideally, unused inputs

should be also terminated with a 50 Ω load to prevent the probes from

creating additional resonances. The Q1 drain voltage and the discharge

cap sense voltage have on-board terminations to greatly reduce this

eect, and in practice, the remaining resonances are small enough to

ignore in most applications. It is recommended that the user verify this

for their own requirements.

All sense measurement MMCXs, except for the shunt measurement,

use the transmission line probe principle to obtain waveform delity at

sub-ns time scales. They have been veried to produce near-identical

Bottom

Left

Breakaway

V-grooves

SMD lasers MMCX Alternate loads

Gate driver

eGaN FET

Current

shunt

Discharge

capacitors

Laser diode

or load EPC9989

interposer Recharging

resistors

EPC9126

results to a Tektronix P9158 3 GHz transmission line probe. As a result

of their design, they have a built-in attenuation factor. The impedance

of the probes at the measurement node is relatively small (~1kΩ).

The user should keep this in mind if accustomed to more conventional

oscilloscope probes.

The current shunt J4 is not used at this time. A future revision may

include this functionality.

Table 2 summarizes the properties of the MMCX test points for ease

of reference.

QUICK START GUIDE Demonstration System EPC9144

MODIFICATIONS

Narrow pulse generator

Many signal generators cannot produce an accurate, short pulse. The

EPC9144 includes circuitry to obtain narrow output pulses, following

a method given in Section 8.2.2.2 of the Texas Instruments LMG1020

data sheet. This method is based on the Jim Williams circuit in [REF].

This is controlled through trimmer potentiometer P1. The pulse range is

approximately ~1.2 ns to ~20 ns.The minimum width is determined from

the point at which the gate drive pulses to Q1 begin to drop out. This

boundary is determined by the LMG1020 gate driver, and may vary with

temperature or other factors. The input pulse with to the narrow pulse

generator should be at least 10 ns longer than the desired pulse width

for reliable operation. The user should consult with Texas Instruments

(Figures 7 & 8) if operating near the IC specication boundaries.

For greater exibility, e.g. when the user would like to use variable

pulse width, the user may disable the narrow pulse generator by

simply removing R27 (Fig. 6). Once done, the input to the gate drive

IC will follow the input pulse from the user’s pulse source. This allows

variable pulse generation and very high frequency operation given the

appropriate user-generated input.

Pulse sources

The EPC9144 comes with out-of-the-box support for 3.3 V logic

levels input to J5. The input includes a logic level translator U4 to

accommodate lower voltage logic, which is often used for high speed

designs. To accommodate lower voltage logic levels, simply change R18

(Fig. 6), which sets the voltage at U4 pin 5, and thereby determines the

input logic level.

For very high speed systems, dierential signaling protocols

such as LVDS or CML are commonly used. To accommodate this,

the EPC9144 has a exible dierential receiver U3, whose inputs

is available via J3. In order to make use of the dierential input

capability, the jumper on J8 must be moved from the SE position

to the DIFF position. This will disable the J5 input and enable the

J3 dierential input (Fig 6.). U3 is congured for a 100 Ω dierential

Table 2: Key properties of the MMCX test points for ease of reference

Designator PCB label Description Attenuation

factor

J6 CAP

Bus capacitor

voltage (VCHARGE on

schematic)

41 V/V

J4 SHUNT Shunt voltage Not used

Not used Q1 drain voltage

41 V/V

J7 VOUT Q1 drain voltage 41 V/V

J9 VGDIN Gate drive input 20 V/V

J10 VGS Q1 gate voltage 20 V/V

impedance with a 0.85 V DC bias oset, which should accommodate

typical LVDS transmitters. These parameters can be modied as

needed to accommodate various dierential signaling schemes.

This application note is useful to congure U3 for dierent needs.

Clamping diodes

The EPC9144 shipped congured as a dual edge control driver.

When the FET Q1 is turned o, energy stored in the stray power loop

inductance can cause a Q1 drain voltage spike to exceed the device

ratings. In order to reduce the voltage spike, a diode-connected

EPC2036 FET Q2 is used to help clamp the drain node. There are

also provisions for up to two other clamping diodes D1 and D2.

While diodes Q2, D1 and D2 can provide some protection to FET Q1

and laser U2, they have parasitic inductance and capacitance that

can reduce performance at the very fastest speeds. Hence, only Q2

is populated, and it is left to the user to determine whether they are

benecial for any particular application. D1, D2, and Q2 locations are

on the bottom side of the EPC9144 PCB.

NOTE. The EPC9144 demonstration board does not have any thermal

protection on board.

Location of

R27 J3 input

(DIFF) J5 input

(SE) Location of

R27

Figure 6: Remove R27 to disable the onboard narrow pulse generator and

drive the gate drive from the pulse source.

QUICK START GUIDE Demonstration System EPC9144

Figure 7: Schematic EPC9144 (part1)

V5V0

6 VDC - 12 VDC

MCP1703T-5002E/MC

5.0 V 250 mA DFN

OUTIN

GND

Logic Supply

Main Supply Input

FD1

Local Fiducials

FD2 FD3

Vlogic

1 μF,

50 V

1 μF,

50 V

1 μF,

50 V

VBUS

1 2

SMD probe loop

TP1

SMD probe loop

TP2

1 μF,

100 V

1 μF,

100 V

1 μF,

100 V

1 μF,

100 V

C1 C2 C3 C4

4.7 μF,

25 V

4-40

HOLE1

4-40

HOLE2

4-40

HOLE3

4-40

HOLE4

1776113-2

High voltage

1776113-2

EN GND

OUT

NCNC

TLV75533PDRVR

1 2

1 μF,

50 V

C11

4.7 μF,

25 V

C10

V3V3

SMD probe loop

TP3

V5V0

1 μF,

50 V

QUICK START GUIDE Demonstration System EPC9144

Figure 8: Schematic EPC9144 (part 2)

IN_SE

Vout

100 nF, 25 V

C27

Vdrain

Vgate

TP5

VCHARGE

SMD

probe

loop

SMD

probe

loop

TP4

5 pF, 50 V

C20

1 2

R14

100 nF, 25 V

C29

100 nF, 25 V

C30

330 Ω, 700 mA

FB1

953

R30

VGDIN VGS

Gate drive input sense

953

R29

Gate voltage sense

Shunt voltage sense

Discharge cap voltage sense

330 Ω, 700 mA

FB2

CAP

SHUNT

Z50 single core

Z50 single core i

Z50 single core

GD prop delay i

GD prop delay

Vlogic

VBUS

V5V0

Drain voltage sense

100 V 200 mA

EMPTY

100 V 200 mA

EMPTY

100 nF, 16 V

C28

VDD

GND

OUTH

OUTL

IN-

IN+

XLMG1020

1 6

VCCGND

NC7WZ16L6X

1 6

VCCGND

NC7WZ16L6X

R28

EMPTY

8 pF, 50 V

C34

8 pF,

50 V

C32

3 2

DNP

100

R23

EMPT

100

1 2

R22

5pF, 50V

C31

5 pF,

50 V

C33

1 2

R24

1 2

R27

5 pF, 25 V

C17

EMPTY

330 Ω, 700 mA

FB3

49.9

1 2

Capacitor Recharge

Discharge capacitor

Laser (or alternate load)

Optional drain clamp

Gate drive

EPC2216

100

1 2

R26

MMCX SMD

J10

MMCX SMD

5 k

1 5

VDD

GND

OUT

+IN -IN

DS90LV012ATMF/NOPB

49.9

1R6

49.9

2 1 2

100

1 2

100

1 2

8pF, 50V

C19

.05" Male Vert.

1 2

3 4

5 6

7 8

Con4x2.05M

IN_D+

IN_D-

V5V0

V3V3 IN_D+ IN_D-

1V3V3

V3V3

100 nF, 25 V

C21

100 nF,

5 V

C12

DIFF

Input pulse processing

VBUS

Dierential receiver (LVDS, CML, LVPECL)

Single ended receiver

Input selection

100 nF, 25 V

C26

1 2

R18

1 k

1 2

R20

4 3

GND

VCCB

VCCA

2N7001TDCK

100

R16

100

R17

3.9

R10

3.9

R11

3.9

R12

3.9

R13

ISENSE

100 nF, 25 V

C13

100 nF, 25 V

C14

100 nF, 25 V

C15

100 nF, 25 V

C16

3.9 k

1 2

EPC2036

VBUS1

1K0

1 2

R15

1K0

1 2

R21

49R9

R25

49R9

R19

0R0

1 2

5 pF, 25 V

C18

EMPTY

100 nF, 25 V

C22

100 nF, 25 V

C23

100 nF, 25 V

C24

100 nF, 25 V

C25

QUICK START GUIDE Demonstration System EPC9144

Table 3: Bill of Materials - EPC9144

Item Quantity Reference Part Description Manufacturer Manufacturer Part #

1 5 C6, C7, C8, C9, C11 Capacitor, 1 µF, 25 V, X7R 0603 Taiyo Yuden UMK107AB7105KA-T

2 4 C1, C2, C3, C4 Capacitor, 1 µF, 100 V, X7S 0805 TDK CGA4J3X7S2A105K125AE

3 2 C5, C10 Capacitor, 4.7 µF, 25 V, X5R 0603 TDK C1608X5R1E475K080AC

4 1 C19 Capacitor, 0.22 µF, 25V, X5R 0603 Taiyo Yuden TMK107BJ224KA-T

5 2 C32,C34 Capacitor, 8 pF, 50 V, NP0 0603 Murata GRM1885C1H8R0BA01D

6 1 C28 Capacitor, 0.1 µF, 16 V,X5R 0204 TDK C0510X5R1C104M030BC

714

C12, C13, C14, C15,

C16, C21, C22, C23,

C24, C25, C26,

C27, C29, C30

Capacitor, 100 nF, 25 V, X7R 0402 TDK C1005X7R1E104K050BB

8 3 C20, C31, C33 Capacitor, 5 pF, 50 V, C0G 0402 TDK C1005C0G1H050C050BA

9 3 FB1, FB2, FB3 330 Ω, 700 mA, ferrite bead 0402 TDK MPZ1005S331ET000

10 1J8 .05 Male Vert. Sullins GRPB031VWVN-RC

11 2J1, J2 Terminal block screw type THT 2-position 3.81 mm pitch Tyco Electronics 1776113 -2

12 1J3 .05 Dual Row

Male 4-Pos Vert. Sullins GRPB042VWVN-RC

13 6 J4, J5, J6, J7, J9, J10 MMCX SMD Molex 0734152063

14 1P1 Potentiometer, 5 kΩ, 0.25 W, 1/4 W, Gull Wing Surface Mount Bourns 3224X-1-502E

15 1Q1 GaN FET, 100 V, 1.7 A, 65 mΩ EPC EPC2036

16 1Q2 GaN FET, 15 V, 3.4 A, 26 mΩ EPC EPC2216

17 2R1,R2,R18 Resistor, 0 Ω Jumper, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2GE0R00X

18 1R4, R6, R7 Resistor, 49.9 Ω, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF49R9X

19 1R5 Resistor, 0 Ω Jumper 0.05 W, 1/20 W, 0201 Yageo RC0201FR-070RL

20 1R8 50 Ω @ 100 MHz, 1 Power Line Ferrite Bead, 1206 Murata BLM31SN500SN1L

21 4R10, R11, R12, R13 Resistor, 3.9 Ω, ±1%, 0.167 W, 1/6 W, 0402 Susumu RL0510S-3R9-F

22 3 R14, R24, R27 Resistor, 10 Ω, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF10R0X

23 5 R3, R9, R15, R20, R21 Resistor, 1 kΩ, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF1001X

24 10 R16, R17, R22, R26 Resistor, 100 Ω, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF1000X

25 2R19, R25 Resistor, 49.9 Ω, ±1%, 0.05 W, 1/20 W, 0201 Yageo RC0201FR-0749R9L

26 1R28 Resistor, 10 kΩ, ±5%, 0.063 W, 1/16 W, 0402 Yageo RC0402JR-0710KL

27 2R29, R30 953 Ω, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF9530X

28 5TP1, TP2, TP3, TP4, TP5 SMD probe loop Keystone 5015

29 1U1 IC, 5 V, 250 mA, DFN Microchip MCP1703T-5002E/MC

30 1U2 IC, LDO, 500 mA Texas Instruments TLV75533PDRVR

31 1U3 IC RECEIVER 0/1 SOT23-5 Texas Instruments DS90LV012ATMF/NOPB

32 1U4 IC, Single-Bit Dual-Supply Buered Voltage Signal Converter Texas Instruments 2N7001TDCK

33 2 U6, U8 IC, BUFF NONINVERT, 5.5 V, 6MICROPAK Fairchild NC7WZ16L6X

34 1U7 IC Gate Driver Texas Instruments XLMG1020

Table 4: Optional components

Item Quantity Reference Part Description Manufacturer Manufacturer Part #

1 2 C17, C18 Capacitor, 5 pF, 25 V, NP0 0201 Murata GJM0335C1E5R0BB01D

2 2 D1, D2 Schottky 100 V, 200 mA ST Microelectronics BAT41KFILM

3 1 R23 Resistor, 100 Ω, ±1%, 0.1 W, 1/10 W, 0402 Panasonic ERJ-2RKF1000X

4 1 U5 Laser, or other load with optional interposer (EPC9989) EPC

EPC Products are distributed through Digi-Key.

www.digikey.com

For More Information:

Please contact info@epc-co.com

or your local sales representative

Visit our website:

www.epc-co.com

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Demonstration Board Notication

The EPC9144 board is intended for product evaluation purposes only. It is not intended for commercial use nor is it FCC approved for resale. Replace components on the

Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Quick Start Guide. Contact an authorized EPC representative with any questions. This board is

intended to be used by certied professionals, in a lab environment, following proper safety procedures. Use at your own risk.

As an evaluation tool, this board is not designed for compliance with the European Union directive on electromagnetic compatibility or any other such directives or regulations. As board

buildsareattimes subjecttoproduct availability, it ispossible that boardsmaycontaincomponentsor assembly materialsthat arenot RoHScompliant.Ecient PowerConversionCorpora-

tion (EPC) makes no guarantee that the purchased board is 100% RoHS compliant.

The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this Quick Start Guide constitute a sales contract or create any kind of warranty, whether express

or implied, as to the applications or products involved.

Disclaimer: EPC reserves theright atany time,without notice, to make changes toany products described herein to improve reliability, function, or design.EPC does not assumeany liability

arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, or other intellectual property whatsoever, nor the

rights of others.

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