EPC EPC9087 User manual

Development Board
EPC9087
Quick Start Guide
Half-Bridge with Gate Drive, Using EPC2037
Revision 1.0

QUICK START GUIDE
2 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
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
0
6
1.5
V
V
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.

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EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 | | 3
Demonstration System EPC9087
Figure 2: Proper measurement of the switch nodes.
Figure 1: Block diagram of EPC9087 development board.
+
7 V – 12 V
+
A
Switch node
External circuit
< 80
VDD supply
VIN supply
Gate drive supply
(note polarity)
PWM input
IIN
_
+
V
IN
(For eciency
measurement)
_
_
V
EPC9087, 100 V DEVELOPMENTBOARD
Rev. 1.0
CBypass
Level shift
PGND
Gate drive
regulator
Logic and
dead-time
adjust
VDD
VIN
Q1
Q2
GND
PWM
Output
LM5113

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4 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
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

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5 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
Demonstration System EPC9087
VCC
7 - 12 Vdc
C4
C10
1
2
J1
CON2
R1
PWM1
GND
A
B
Y
VDD
U1
NC7SZ00L6X
See Table
SW OUT
GND
(
Optional)
1
TP3
CON1
1
2
3
4
J8
CON4
1
2
3
4
J3
CON4
1
2
3
4
J4
CON4
1
2
3
4
J6
CON4
1
2
3
4
J5
CON4
C11
1
TP2
Keystone 5015
1
TP1
Keystone 5015
R2
Zero
R14
R15
Zero
R5
47.0
D2
SDM03U40
R4
33
D1
SDM03U40
VCC
OUT
1
NC
2
NC
3
GND
4
NC
5
NC
6
NC
7
IN
8
GND
9
U3
MCP1703
1
2
J2
CON2
1
2
J9
CON2
2
P1
2
P2
GND
A
B
Y
VDD
U4
NC7SZ08L6X
C9
R19
1 Ohm
R20
1 Ohm
R23
1 Ohm
R24
1 Ohm
C21
U2
LM5113TM
C19
C17
C16
100 pF
Q1
EPC2037
Q2
EPC2037
Optional
Optional
Optional
1 μF, 100 V
1 μF, 25 V
1 μF, 25 V
1 μF, 25 V
10 k
0.1 μF, 25 V
0.1 μF, 25 V
100 pF
1
2
3
4
J7
CON4
Figure 5: Development board EPC9087 schematic .

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www.digikey.com
For More Information:
Please contact [e-mail]
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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.