Epc Epc9087 User manual

Development Board

EPC9087

Quick Start Guide

Half-Bridge with Gate Drive, Using EPC2037

Revision 1.0

QUICK START GUIDE

Demonstration System EPC9087

DESCRIPTION

The EPC9087 development board provides a half bridge conguration

with onboard gate drives, featuring the EPC2037 eGaN® eld eect

transistors (FETs). The purpose of this development board is to simplify

the evaluation process of the EPC2037 eGaN FET by including all the

critical components on a single board that can be easily connected into

any existing converter.

The EPC9087 development board is 2” x 1.5” and contains two

EPC2037 eGaN FETs in a half-bridge conguration using the Texas

Instruments LM5113 gate driver, supply and bypass capacitors.

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.

A block diagram of the circuit is given in gure 1.

For more information on the EPC2037 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.

* Maximum current depends on die temperature – actual maximum current with be subject to

switching frequency, bus voltage and thermal cooling.

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

Symbol Parameter Conditions Min Max Units

VDD Gate Drive Input

Supply Range 7 12 V

VIN Bus Input Voltage

Range 80 V

IOUT Switch Node Output

Current* 1* 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

< 10 ns 25 ns

QUICK START PROCEDURE

Development board EPC9087 is easy to set up to evaluate the perfor-

mance of the EPC2037 eGaN FET. Refer to gure 2 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 input power to +VDD (J1) and

ground return to –VDD (J1) as shown in gure 2.

4. With power o, connect the input PWM control signal to PWM (J2) and

ground return (J2) as shown in gure 2.

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 starting at 0 V and slowly increase 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.

Switch node measurement points are located on the top and bottom

sides of the EPC9087 board. It is recommended, if possible, to

install the measurement point on the backside of board to prevent

contamination of the top side components.

For information about measurement techniques, please review

application note AN023: Accurately Measuring High Speed GaN

Transistors:

http://epc-co.com/epc/DesignSupport/ApplicationNotes.aspx

EPC9087 board.

QUICK START GUIDE

Demonstration System EPC9087

Figure 2: Proper measurement of the switch nodes.

Figure 1: Block diagram of EPC9087 development board.

7 V – 12 V

Switch node

External circuit

< 80

VDD supply

VIN supply

Gate drive supply

(note polarity)

PWM input

IIN

(For eciency

measurement)

EPC9087, 100 V DEVELOPMENTBOARD

Rev. 1.0

CBypass

Level shift

PGND

Gate drive

regulator

Logic and

dead-time

adjust

VDD

VIN

GND

PWM

Output

LM5113

QUICK START GUIDE

Demonstration System EPC9087

THERMAL CONSIDERATIONS

The EPC9087 development board showcases the EPC2037 eGaN FET.

The EPC9087 is intended for bench evaluation with low ambient

temperature and convection cooling. The addition of heat-sinking and

forced air cooling can signicantly increase the current rating of these

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

die temperature of 150°C.

NOTE.The EPC9087 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.

EPC9087 BOM

Item Qty Reference Part Description Manufacturer Part Number

1 1 C21 Capacitor, 1 µF, ±10%, 100 V, X7S TDK CGA4J3X7S2A105K125AE

2 3 C4, C10, C11, Capactior, 1 µF, ±10%, 25V, X5R Murata GRM188R61E105KA12D

3 2 C9, C19 Capacitor, 100 nF, ±10%, 25V, X5R TDK C1005X5R1E104K050BC

4 2 C16, C17 Capactior, 100 pF, ±5%, 50V, NP0 Murata GRM1555C1H101JA01D

5 1 R1 Resistor, 10.0 kΩ, ±1%, 1/8 W Stackpole RMCF0603FT10K0

6 1 R5 Resistor, 47 Ω, ±1%, 1/8 W Stackpole RMCF0603FT47R0

7 1 R4 Resistor, 33.0 Ω, ±1%, 1/8 W Stackpole RMCF0603FT33R0

8 2 R2, R15 Resistor, 0 Ω, 1/8 W, Jumper Panasonic ERJ-3GEY0R00V

9 4 R19, R20, R23, R24 Resistor, 1 Ω, 1/16 W, Jumper Stackpole RMCF0402FT1R00

11 2 D1, D2 Schottky Diode, 30 V, 370 mV @ 1 mA, 30 ma Diodes Inc SDM03U40-7

10 2 Q1, Q2 eGaN® FET, 100V , 1.7A, 550 mΩ EPC EPC2037

12 1 U3 5 V LDO, 250 ma, up to 16 V In, Vdropout=0.33V @ 250 mA Microchip MCP1703T-5002E/MC

13 1 U2 Gate driver , 5.2 VDC, 1.2 A Texas Instruments LM5113TME/NOPB

14 1 U1 I.C., Logic 2 NAND Gate, 1.65 V to 5.5 V Fairchild NC7SZ00L6X

15 1 U4 2 input NAND Gate, tiny Logic Fairchild NC7SZ08L6X

16 2 TP1, TP2 Test Point, Subminiature Keystone 5015

17 0.19 TP3, J1, J2, J9 Connector, Male Vertical, 36 Pin. 230" Contact Height, .1" Center Pitch FCI 68001-236HLF

18 1 J3, J4, J5, J6, J7, J8 Connector, 24 Pin Male Header 0.1" Pitch FCI 68602-224HLF

QUICK START GUIDE

Demonstration System EPC9087

VCC

7 - 12 Vdc

C10

CON2

PWM1

GND

VDD

NC7SZ00L6X

See Table

SW OUT

GND

(

Optional)

TP3

CON1

CON4

C11

TP2

Keystone 5015

TP1

Keystone 5015

Zero

R14

R15

Zero

47.0

SDM03U40

VCC

OUT

GND

MCP1703

CON2

GND

VDD

NC7SZ08L6X

R19

1 Ohm

R20

1 Ohm

R23

1 Ohm

R24

1 Ohm

C21

LM5113TM

C19

C17

C16

100 pF

EPC2037

Optional

1 μF, 100 V

1 μF, 25 V

10 k

0.1 μF, 25 V

100 pF

CON4

Figure 5: Development board EPC9087 schematic .

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

Sign-up to receive

EPC updates at

bit.ly/EPCupdates

or text“EPC”to 22828

Demonstration Board Warning and Disclaimer

The EPC9087 board is intended for product evaluation purposes only and is not intended for commercial use. 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

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 Power Conversion

Corporation (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, tomake changesto any products describedherein toimprove reliability, function, or design. EPCdoes 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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