EPC9080 Quick Start Guide Datasheet by EPC

EFFICIENT POWER CONVERSION l
Development Board
EPC9080
Quick Start Guide
EPC2045 and EPC2022
100 V Half-bridge with Gate Drive, Using EPC2045 & EPC2022
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2 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
QUICK START GUIDE EPC9080
DESCRIPTION
The EPC9080 development board is a 100 V maximum device voltage,
30 A maximum output current, half bridge with onboard gate drives,
featuring the EPC2045 and EPC2022 enhancement mode (eGaN®) field
effect transistors (FETs) designed for high step down, high current
applications. The purpose of this development board is to simplify the
evaluation process of the EPC2045 and EPC2022 eGaN FETs by including
all the critical components on a single board that can be easily connected
into any existing converter.
The EPC9080 development board is 2” x 2” and contains one high side
EPC2045 eGaN FET and one low side EPC2022 eGaN FET in a half bridge
configuration using the Texas Instruments LM5113 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 efficiency calculation. A block diagram of
the circuit is given in figure 1.
For more information on the EPC2045 and EPC2022 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 EPC9080 is easy to set up to evaluate the performance
of EPC2045 and EPC2022 eGaN FETs. Refer to figure 2 for proper connect
and measurement setup and follow the procedure below:
1. With power off, connect the input power supply bus to +VIN (J5, J6)
and ground / return to –VIN (J7, J8).
2. With power off, connect the switch node (SW) of the half bridge OUT
(J3, J4) to your circuit as required (half bridge configuration). The
EPC9080 features an optional buck converter configuration, as shown
in figure 2, with unpopulated footprints for an output inductor and
output capacitors.
3. With power off, connect the gate drive input to +VDD (J1, Pin-1) and
ground return to –VDD (J1, Pin-2).
4. With power off, 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,
efficiency 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 (J10) 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/
EPC9080 development board
Table 1: Performance Summary (TA = 25°C) EPC9080
Symbol Parameter Conditions Min Max Units
VDD Gate Drive Input Supply Range 7.5 12 V
VIN Bus Input Voltage Range(1) 80 V
IOUT Switch Node Output Current (2) 30 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 200 ns
(1) Maximum input voltage depends on inductive loading, maximum switch node ringing must be kept
under 100 V for EPC2045 and EPC2022.
(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.
4| p
QUICK START GUIDE EPC9080
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Figure 2: Proper connection and measurement setup.
Figure 3: Typical Waveform for VIN = 48 V to 1.8 VOUT, 20 A (500 kHz) Buck Converter.
Figure 1: Block diagram of EPC9080 development board.
V
IN
V
OUT
Gate drive
regulator
Logic and
dead-time
adjust
LM5113
gate
driver
V
DD
PWM input
Gate drive supply Half-bridge with
bypass capacitors
Gate drive supply
(note polarity)
7.5 V – 12 V Half bridge configuration
Switch node
+
–
(For efficiency
measurement)
VDD supply
+
–
VV
A
IN
+
–
VIN supply
IIN
+
+
+
–
–
–
PWM input
External load Optional buck configuration
Optional output
capacitor pads
External circuit
Optional
inductor
pads
Optional 2-pin
header for switch
node measurement
V
IN
= 48 V, V
OUT
= 1.8 V, I
OUT
= 20 A, f
SW
= 500 kHz
10 V/div 20 ns/div
QUICK START GUIDE EPC9080
QUICK START GUIDE EPC9080
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THERMAL CONSIDERATIONS
The EPC9080 development board showcases the EPC2045 and EPC2022
eGaN FET. The EPC9080 is intended for bench evaluation with low ambient
temperature and convection cooling. The addition of heat-sinking and
forced air cooling can significantly 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 EPC9080 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
Efficient Power Conversion, First Edition, Power Conversion Publications, 2015.
Optional Components
Item Qty Reference Part Description Manufacturer/Part Number
1 DNP P1,P2 Optional Potentiometer
2 DNP FD1, FD2, FD3 PCB Fiducial
3 DNP J10 VSW probe
4 DNP R14 Low side drive PWM option
Table 2: Bill of Materials
Item Qty Reference Part Description Manufacturer/Part Number
1 3 C4, C10, C11 Capacitor, 1 µF, 10%, 25 V, X5R Murata, GRM188R61E105KA12D
2 1 C9 Capacitor, 0.1 µF, 10%, 25 V, X5R TDK, C1005X5R1E104K050BC
3 2 C16, C17 Capacitor, 100 pF, 5%, 50 V, NP0 Kemet, C0402C101K5GACTU
4 1 C19 Capacitor, 1 µF, 10%, 25 V, X5R TDK, C1005X5R1E105K050BC
5 4 C21, C22, C23, C24 Capacitor, CER 1 µF 100 V 20% X7S 0805 TDK, C2012X7S2A105M125AB
6 2 D1, D2 Schottky Diode, 30 V Diodes Inc., SDM03U40-7
7 1 Q1 eGaN FET, 100 V, 7 mΩ EPC, EPC2045
8 1 Q2 eGaN FET, 100 V, 3.2 mΩ EPC, EPC2022
9 1 U1 IC GATE NAND 1CH 2-INP 6MICROPAK Fairchild, NC7SZ00L6X
10 1 U2 Gate Driver, LM5113, USMD, BGA Texas Instruments, LM5113
11 1 U3 I.C., Regulator MCP1703T-5002E/MC Microchip, MCP1703T-5002E/MC
12 1 U4 IC GATE AND 1CH 2-INP 6-MICROPAK Fairchild, NC7SZ08L6X
13 1 R1 Resistor, 10.0 K, 5%, 1/8W Stackpole, RMCF0603FT10K0
14 3 R2, R15, R3 Resistor, 0 Ω, 1/8W, 0603 ERJ-3GEY0R00V
15 1 R4 RES SMD 115 Ω 1% 1/10W 0603 311-115HRTR-ND
16 1 R5 RES SMD 120 Ω 1% 1/10W 0603 311-120HRTR-ND
17 1 R19 RES SMD 0.0 Ω JUMPER 1/16W Stackpole, RMCF0402ZT0R00TR-ND
18 3 J1, J2, J9 Connector, 2pins of Tyco, 4-103185-0 2 pins of Tyco, 4-103185-0
19 6 J3, J4, J5, J6, J7, J8 Connector, FCI, 68602-224HLF FCI, 68602-224HLF
20 2 TP1, TP2
Test Point, Keystone Elect, 5015 Keystone Elect, 5015
“flu HM \ 7W a» ELF»
QUICK START GUIDE EPC9080
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Figure 4: EPC9080 - Schematic
R1
10k
PWM1
GND
A
B
Y
VDD
U1
NC7SZ00L6X
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
TP2
Keystone 5015
1
TP1
Keystone 5015
R2
Zero
R14
Optional
R15
Zero
R5
D2
SDM03U40
R4
D1
SDM03U40
PWM2
VCC
1
2
J2
CON2
1
2
J9
CON2
2
P1
Optional
2
P2
Optional
GND
A
B
Y
VDD
U4
NC7SZ08L6X
C9
C22
See Table
C23
See Table
C21
See Table
U2
LM5113TM
C19
C17
100pF
C16
100pF
C24
See Table
R19
1
2
J10
CON2
VCC
7 - 12 Vdc
C4
C10
1
2
J1
CON2 C11
OUT1
NC 2
NC 3
GND4
NC
5
NC
6
NC
7
IN
8
GND
9
U3
MCP1703
R3
VLDO
VG1
VG2
VSW
VIN
HIN
LIN
Q1
Q2
EFFIEIENT POWER (ONVERSION l
Demonstration Board Notification
The EPC9080 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 certified 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. Efficient Power Conversion 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 the right at any time, without notice, to make changes to any products described herein to improve reliability, function, or design. EPC does 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.
EPC Products are distributed through Digi-Key.
www.digikey.com
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