EPC EPC9079 User manual

Development Board
EPC9079
Quick Start Guide
EPC2046
200 V Half-bridge with Gate Drive, Using EPC2046

2 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
QUICK START GUIDE EPC9079
DESCRIPTION
The EPC9079 development board (gure 1) is a 200 V maximum device
voltage, 6 A maximum output current, half bridge with onboard gate
drives, featuring two EPC2046 enhancement mode (eGaN®) eld eect
transistors (FETs). The purpose of this development board is to simplify
the evaluation process of the EPC2046 eGaN FETs by including all the
critical components on a single board that can be easily connected into
any existing converter.
The EPC9079 development board is 1.5” x 2” and contains two EPC2046
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 to add an
isolator for the low side gate drive. A block diagram of the circuit is given
in gure 2.
For more information on the EPC2046 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 EPC9079 is easy to set up to evaluate the
performance of EPC2046 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 pins.
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: EPC9079 development board
Table 1: Performance Summary (TA= 25°C) EPC9079
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) 6 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 < 10ns 50 ns
Minimum ‘Low’ State Input
Pulse Width (3)
VPWM rise and
fall time < 10ns 50 ns
(1) Maximum input voltage depends on inductive loading, maximum switch node ringing must be kept
under 200 V for EPC2046.
(2) Maximum current depends on die temperature – actual maximum current with be subject to
switching frequency, bus voltage and thermal cooling.
(3) Limited by time needed to ‘refresh’ high side bootstrap supply voltage.

QUICK START GUIDE EPC9079
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 | | 3
Figure 3: Proper connection and measurement setup.
Figure 4: Typical Waveform forVIN = 150V to 15VOUT, 5 A, (100 kHz) buck converter.
Figure 2: Block diagram of EPC9079 development board.
V
IN
V
OUT
Gate drive
regulator
Logic and
dead-time
adjust
V
DD
PWM input
Gate drive supply
Gate
driver
Gate
driver
Half-bridge with
bypass capacitors
Highside
isolator
Gate drive supply
(note polarity)
7.5 – 12 V
Half bridge conguration
Switch node
+
–
(For eciency
measurement)
VDD supply
+
–
VVA
IN
+
–
VIN supply
IIN
+
+
–
–
PWM input
Optional MMCX
jacks for gate drive
measurement
External circuit
Optional 2-pin header for switch node measurement
200 ns/ div

4 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
QUICK START GUIDE EPC9079
THERMAL CONSIDERATIONS
The EPC9079 development board showcases the EPC2046 eGaN FET.The
EPC9079 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 EPC9079 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, NP0 TDK, CGA3E2C0G1H101J080AA
3 4 C8, C9, C12, C13 Capacitor, 0.22 µF, 16%, 25 V, X7R TDK, C1005X7R1C224K050BC
4 4 C16, C17, C18, C19 Capacitor, 0.1 µF, 10%, 250 V, X7T TDK, C2012X7T2E104K125AA
5 1 C41 Capacitor, 10 pF, 5%, 50 V, NP0 Kemet, C0402C100J5GACTU
6 1 C42 Capacitor, 100 pF, 5%, 50 V, NP0 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 Diode, 200 V, 1 A Diodes Inc., DFLS1200
10 2 D4, D5 Diode, 40 V, 200 mA Diodes Inc., BAS40LP-7
11 2 D6, D7 Diode, 5.61 V, 500 mW On Semiconductor, MM5Z5V6ST1G
12 3 FD1, FD2, FD3 SML Fiductial N/A
13 1 GP1 Connector, .1" Male Vert. Wurth, 61300111121
14 2 J1, SWP1 Connector, .1" Male Vert. Wurth, 61300211121
15 1 J2 Connector, .1" Male Vert. 4 pins of Tyco, 4-103185-0-04
16 1 J3, J4, J5, J6, J7, J8 Connector, .1" Male Vert. 4 pins of FCI, 68602-224HLF
17 2 J21, J22 Connector, MMCX SMD Molex, 0734152063
18 2 Q1, Q2 eGaN® FET, 200 V, 25 mΩ EPC, EPC2046
19 1 R1 Resistor, 10.0 K, 1%, 1/10 W Stackpole, RMCF0603FT10K0
20 2 R2, R3 Resistor, 0 Ω, 1/10 W Panasonic, ERJ-3GEY0R00V
21 1 R4 Resistor, 100 Ω, 1%, 1/10 W Stackpole, RMCF0603FT100R
22 1 R5 Resistor, 470 Ω, 1%, 1/10 W Stackpole, RMCF0603FT470R
23 4 R6 Resistor, 0 Ω, 1/10 W Panasonic, ERJ-2GE0R00X
24 2 R11, R12 Resistor, 1 Ω, 1%, 1/16 W Stackpole, RMCF0402FT1R00
25 2 R21, R22 Resistor, 0 Ω, 1/16 W Stackpole, RMCF0402ZT0R00
26 2 TP1, TP2 Test Point Keystone Elect, 5015
27 1 U1 IC, Logic Fairchild, NC7SZ00L6X
28 1 U2 IC, Opto-coupler Silicon Labs, Si8610BC
29 1 U4 IC, Logic Fairchild, NC7SZ08L6X
30 2 U6, U7 IC, Gate driver Texas Instruments, UCC27611
31 0 P1, P2 Optional potentiometer
32 0 R14, R15 Optional resistor
33 0 U5 Optional IC

QUICK START GUIDE EPC9079
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 | | 5
Figure 5: EPC9079 - Schematic
1 2 3 4 5
6 7 8
U2 Si8610BC
1 2 3 4 5
6 7 8
U5 EMPTY
0Ω
R3
0.22μF, 16 V
0.22μF, 16 V
C12
C13
1
2
3
4
J8 CON4
1
2
3
4
J7 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
1
P2 Keystone 5015
1
TP1 Keystone 5015
10 K, 1%
R1
GND
3
A
1
B
2
Y4
VDD 6
55
U1 NC7SZ00L6X
0Ω
R2
R14
EMPT Y
R15 EMPT Y
470 Ω, 1%
R5
C7 EMPT Y
30 V, 30 mA
D2
100 Ω, 1%
R4
100pF, 50 V
C6
30 V, 30 mA
D1
GND
3
A
1
B
2
Y4
VDD 6
5
U4 NC7SZ08L6X
7 - 12 Vdc
1μF, 25 V C10
C11
VCC
VCC
1μF, 25 V
1μF, 25 V
C2
1μF, 25 V
C3
6
2 37
4 5
LDO VREF
VSS
1VDD
U6 UCC27611
6
2 37
4 5
LDO VREF
VSS
1VDD
U7 UCC27611
0.22μF, 16 V
0.22μF, 16 V
C8
C9
1μF, 25 V
C1
40 V, 200 mAD4
40 V, 200 mAD5
C18C16 C17
R12 1Ω, 1%
1Ω, 1%R11
VDD
VDD
GDL 1 GDL 2 GDH1 GDH2
GDH
GDL
GND
DRLT
DRHT
VSW
BC
VCC
DRL
DRH
VCC
PWM1
GND
PWM2 DL
DH
GND
PWM1
DZH
1
.1" Male Vert.
.1" Male Vert.
.1" Male Vert.
GP1
Ground Post
EPC2046 EPC2046 Q1 Q2
0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V
0.1μF, 250 V 0.1μF, 250 V 0.1μF, 250 V 0.1μF, 250 V
0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V 0.22μF, 250 V
C60 C61 C62 C63 C64
VIN VIN VIN VIN VIN
VIN VIN VIN VIN
VIN VIN VIN VIN
VIN
C65 C66 C67 C68 C69
VI N
10pF, 50 V
C41
100pF, 50 V
C42
1 2 3 4
.1
" Male Vert.
J2
PWM1 GND GND PWM2
1 2
J1
1 2
SWP1
Switch Node SIP Probe
Half Bridge Board using EPC2046
VSW
MMCX SMD MMCX SMD
J21 EMPTY
J22 EMPT Y
0Ω
12 R21
EMPT Y
0Ω
12 R22
EMPT Y
MMCX Gate Probes
GDH GDL
VSW
C19
0Ω
1 2
R6
D6 MM5Z5V6ST 1G
D7
MM5Z5V6ST1G
200 V, 1A D3
DNP 1K
P1
DNP 1K
P2
ClassName: High Voltage
ClassName: High Voltage Gate
ClassName: High Voltage
ClassName: HighVoltageGate
FD1
Local Fiducials
FD2 FD3

Demonstration Board Notication
The EPC9079 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
buildsareattimessubject to product availability, itispossible thatboardsmaycontain componentsor assembly materialsthatarenotRoHScompliant.EcientPowerConversion Corpora-
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 therightatany time,without notice, tomake changes to anyproducts described hereintoimprovereliability, function, or design. EPCdoes notassumeanyliability
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.
EPC Products are distributed through Digi-Key.
www.digikey.com
For More Information:
Please contact [e-mail]
or your local sales representative
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