IEPC EPC9048C Manuel utilisateur

Development Board

EPC9048C

Quick Start Guide

200 V Half-bridge with Gate Drive, Using EPC2034C

Revision 2.0

QUICK START GUIDE EPC9048C

DESCRIPTION

The EPC9048C development board shown in gure 1 is a 200 V maximum

device voltage, 15 A maximum output current, half bridge with onboard

gate drives, featuring two EPC2034C enhancement mode (eGaN®) eld

eect transistors (FETs). The purpose of this development board is to

simplify the evaluation process of the EPC2034C eGaN FETs by including

all the critical components on a single board that can be easily connected

into any existing converter.

The EPC9048C development board is 1.5”x 2”and contains two EPC2034C

eGaN FETs in a half bridge conguration. As supplied, the high side gate

drive uses a digital isolator and both FETs use the Texas Instruments

UCC27611 gate driver. The board also contains all critical components

and layout for optimal switching performance. There are also various

probe points to facilitate simple waveform measurement and eciency

calculation, as well as the option to add trimmer resistors for adjustable

deadtime to provide separate high and low side inputs, and an isolator for

the low side gate drive. A block diagram of the circuit is given in gure 2.

For more information on the EPC2034C please refer to the datasheet

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

conjunction with this quick start guide.

QUICK START PROCEDURE

Development board EPC9048C is easy to set up to evaluate the

performance of EPC2034C eGaN FETs. Refer to gure 3 for proper connect

and measurement setup and follow the procedure below:

1. With power o, connect the input power supply bus to +VIN (J5, J6) and

ground / return to –VIN (J7, J8).

2. With power o, connect the switch node (SW) of the half bridge OUT

(J3, J4) to your circuit as required (half bridge conguration).

3. With power o, connect the gate drive power supply to +VDD

(J1, Pin-1) and ground return to –VDD (J1, Pin-2).

4. With power o, connect the input PWM control signal to PWM

(J2, Pin-1) and ground return to any of the remaining J2 ground pins

(J2 Pin-2 or J2 Pin-4).

5. Turn on the gate drive supply – make sure the supply is between 7.5 V

and 12 V range.

6. Turn on the controller / PWM input source.

7. Turn on the bus voltage to the required value (do not exceed the

absolute maximum voltage) and probe switching node to see

switching operation.

8. Once operational, adjust the PWM control, bus voltage, and load within

the operating range and observe the output switching behavior,

eciency and other parameters.

9. For shutdown, please follow steps in reverse.

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

to provide an accurate high speed measurement. An optional two pin header (SWP1) is

included for switch node measurement. It is recommended to install measurement point on

backside of board to prevent contamination of the top side components.

For information about measurement techniques, please review the how to GaN series:

HTG09- Measurement

http://epc-co.com/epc/DesignSupport/TrainingVideos/HowtoGaN/

Figure 1: EPC9048C development board

Table 1: Performance Summary (TA= 25°C) EPC9048C

Symbol Parameter Conditions Min Max Units

VDD Gate Drive Input Supply Range 7.5 12 V

VIN Bus Input Voltage Range(1) 160 V

IOUT Switch Node Output Current (2) 15 A

VPWM

PWM Logic Input Voltage

Threshold

Input ‘High’

Input ‘Low’

3.5

1.5

Minimum ‘High’ State

Input Pulse Width

VPWM rise and

fall time < 10ns 100 ns

Minimum ‘Low’ State Input

Pulse Width (3)

VPWM rise and

fall time < 10ns 100 ns

(1) Maximum input voltage depends on inductive loading, maximum switch node ringing must be kept under

200 V for EPC2034C.

(2) Maximum current depends on die temperature – actual maximum current with be subject to switching

frequency, bus voltage and thermal cooling may be lower or higher. Please see the EPC2034C datasheet for

further information.

(3) Limited by time needed to ‘refresh’ high side bootstrap supply voltage.

QUICK START GUIDE EPC9048C

Figure 3: Proper connection and measurement setup.

Figure 4: Typical Waveform forVIN = 150 V to 12VOUT, 15 A, ~180 W, ~300 LFM airow, 100 kHz buck converter

Figure 2: Block diagram of EPC9048C development board.

VGSL

VSW

VDD

BTST

PWM

GND

Gate drive

regulator

Digital

Isolator

Logic and

dead-time

adjust

VIN

VSW

CBypass

PGND

Digital

Isolator

Gate driver

with LDO

Gate driver

with LDO

VDD supply

(note polarity)

7.5 – 12 V

Half bridge conguration

Switch node

(For eciency

measurement)

–

VVA

IIN

–

PWM input

Optional MMCX

jacks for gate drive

measurement

External circuit

Optional 2-pin header for switch node measurement

VIN

supply

QUICK START GUIDE EPC9048C

THERMAL CONSIDERATIONS

The EPC9048C development board showcases the EPC2034C eGaN FET.

The EPC9048C is intended for bench evaluation with typical room ambient

temperature. The addition of heat-sinking and forced air cooling can

signicantly increase the current capability of these devices, but care must

be taken to not exceed the absolute maximum die temperature of 150° C.

NOTE. The EPC9048C development board does not have any current or thermal

protection on board.

For more information regarding the thermal performance of EPC eGaN FETs, please

consult:

D. Reusch and J. Glaser, DC-DC Converter Handbook, a supplement to GaN Transistors for

Ecient Power Conversion, First Edition, Power Conversion Publications, 2015.

Table 2: Bill of Materials

Item Qty Reference Part Description Manufacturer Part #

1 5 C1, C2, C3, C10, C11

Capacitor, 1 μF, 10%, 25 V, X5R Murata

GRM188R61E105KA12D

2 1 C6

Capacitor, 100 pF, 5%, 50 V TDK

C1608C0G1H101J080AA

3 4 C8, C9, C12, C13

Capacitor, 0.22 μF, 10%, 16 V, X7R TDK

C1005X7R1C224K050BC

4 4 C16, C17, C18, C19

Capacitor, 0.1 μF, 10%, 250 V, X7T TDK

C2012X7T2E104K125AE

5 1 C41

Capacitor, 10 pF, 5%, 50 V Kemet

C0402C100J5GACTU

6 1 C42

Capacitor, 100 pF, 5%, 50 V TDK

C1005C0G1H101J050BA

7 10 "C60, C61, C62, C63,C64,C65,

C66, C67, C68, C69"

Capacitor, 0.22 μF, 10%, 250 V, X7T TDK

C3216X7T2E224K160AA

8 2 D1, D2

Schottky Diode, 30 V, 30 mA Diodes Inc.

SDM03U40-7

9 1 D3

Schottky Diode, 200 V, 1 A Diodes Inc.

DFLS1200

10 2 R12, R14

Resistor, 4.7 Ω, 1%, 1/16 W Stackpole

RMCF0402FT4R70

11 2 D6, D7

Zener Diode, 5.61 V, 500 mW On Semiconductor

MM5Z5V6ST1G

12 1 GP1

Connector, .1" Male Vert. Würth

61300111121

13 2 J1, SWP1

Connector, .1" Male Vert. Würth

61300211121

14 1 J2

Connector, .1" Male Vert. Tyco

4 pins of 4-103185-0-04

15 1 "J3, J4, J5,

J6, J7, J8"

Connector, .1" Male Vert. FCI

4 pins of 68602-224HLF

16 2 Q1, Q2

eGaN® FET, 200 V, 8 mΩ EPC

EPC2034C

17 1 R1

Resistor, 10.0 kΩ, 1%, 1/10 W Stackpole

RMCF0603FT10K0

18 2 R2, R3

Resistor, 0 Ω, 1/10 W Panasonic

ERJ-3GEY0R00V

19 1 R4

Resistor, 100 Ω, 1%, 1/10 W Stackpole

RMCF0603FT100R

20 1 R5

Resistor, 470 Ω, 1%, 1/10 W Stackpole RMCF0603FT470R

21 1 R6

Resistor, 0 Ω, 1/10 W Panasonic ERJ-2GE0R00X

22 2 R11, R12

Resistor, 1 Ω, 1%, 1/16 W Stackpole RMCF0402FT1R00

23 2 TP1, TP2

Test Point Keystone 5015

24 1 U1

IC, Logic Fairchild NC7SZ00L6X

25 1 U2

IC, Opto-coupler Silicon Labs

Si8610BC

26 1 U4

IC, Logic Fairchild

NC7SZ08L6X

27 2 U6, U7

IC, Gate driver TI

UCC27611

Table 2: Bill of Materials

Item Qty Reference Part Description

1 DNP P1, P2 Optional potentiometer

2 DNP R21, R22 Optional resistor

3 DNP U5 Optional IC

QUICK START GUIDE EPC9048C

Figure 5: EPC9048C - Schematic

0 Ω

0.22μF

0.22 μF,

255

0 Ω

100 Ω

100 V

2 5

12 V

1 μF, 25 V

1 μF,

25 V

11 1 μF,

25 V

1 μF,

ClassName: HighVoltage Gate

Net Class

0.22 μF,

1μF,

25 V

0.1 μF,

250 V

0.1 μF,

250 V

0.1 μF,

250 V

12 1 Ω

11 1 Ω

Local Fiducials

Ground Post

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

0.22 μF,

250 V

10 V

100

0 Ω

Switch Node SIP Probe

21 22

2 21 1

0 Ω

2 22 1

MMCX Gate Probes

0.1 μF,

250 V

1 2

200 V, 1

30 V, 30 mA

0 Ω

16 V

EPC Products are distributed through Digi-Key.

www.digikey.com

Demonstration Board Notication

The EPC9048C 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

buildsareat times subjecttoproduct availability, it ispossible that boardsmay containcomponentsor assembly materials thatarenot RoHS compliant.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 at any time,without notice,to makechanges to any products described herein to improve reliability, function, or design. EPCdoes not assume any 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.

For More Information:

Please contact [email protected]om

or your local sales representative

Visit our website:

www.epc-co.com

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bit.ly/EPCupdates

or text“EPC”to 22828

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