Development Board
EPC9049
Quick Start Guide
Monolithic Half Bridge with
Gate Drive for EPC2035
Revision 1.0
QUICK START GUIDE
DESCRIPTION
Demonstration System EPC9049
Table 1: Performance Summary (TA = 25°C)
This development board is in a half bridge topology with onboard
gate drives, featuring the EPC2035 eGaN® field effect transistors (FETs).
The purpose of these development boards is to simplify the evaluation process of these eGaN FETs by including all the critical components on a single board that can be easily connected into any existing
converter.
Symbol
Parameter
VDD
Gate Drive Input
Supply Range
VIN
Bus Input
Voltage Range
VOUT
The development board is 2” x 1.5” and contains two eGaN FETs in a
half bridge configuration using the Texas Instruments LM5113 gate
driver, supply and bypass capacitors. The board 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 complete block diagram of the circuit is
given in Figure 1.
For more information on the EPC2035 eGaN FET, please refer to the
datasheets available from EPC at www.epc-co.com. The datasheet
should be read in conjunction with this quick start guide.
Conditions
Min
Max
Units
7
12
V
When using 60 V
devices, EPC2035
48
V
Switch Node
Output Voltage
When using 60 V
devices, EPC2035
60
V
IOUT
Switch Node Output
Current
When using 60 V
devices, EPC2035
4*
A
VPWM
PWM Logic Input
Voltage Threshold
Input ‘High’
3.5
6
V
Input ‘Low’
0
1.5
V
Minimum ‘High’ State VPWM rise and fall time
Input Pulse Width
< 10ns
Minimum ‘Low’ State
Input Pulse Width
VPWM rise and fall time
< 10ns
60
ns
200#
ns
* Assumes inductive load, maximum current depends on die temperature – actual maximum current
with be subject to switching frequency, bus voltage and thermal cooling.
# Limited by time needed to ‘refresh’ high side bootstrap supply voltage.
QUICK START PROCEDURE
VDD
The development boards are easy to set up to evaluate the performance
of the eGaN FET. The board allows the on-board placement of buck
output filter components. Refer to Figure 2 for proper connect and
measurement setup and follow the procedure below:
Gate drive
regulator
PWM
input
Logic and
dead-time
adjust
1. With power off, connect the input power supply bus to +VIN (J5, J6)
and ground / return to –VIN (J7, J8).
Gate drive supply
Half-bridge with bypass
VIN
LM5113
gate
driver
OUT
2. With power off, connect the switch node of the half bridge OUT (J3,
J4) to your circuit as required.
Figure 1: Block Diagram of Development Board
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 V and 12 V range.
6. Turn on the bus voltage to the required value (do not exceed the
absolute maximum voltage of 60 V on VOUT).
7. Turn on the controller / PWM input source and probe switching node
to see switching operation.
8. Once operational, adjust the bus voltage and load PWM control within
the operating range and observe the output switching behavior,
efficiency and other parameters.
7 V – 12 V
_
EPC9049,
V DEVELOPMENTBOARD
49, 60 60
VDD Supply
+
Gate drive supply
(note polarity)
A
IIN
+
VIN
_
+
V
(For efficiency
measurement)
Switch node
< 48 V
VIN Supply
_
External circuit
PWM input
9. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node (OUT), care must be taken
to avoid long ground leads. Measure the switch node (OUT) by placing the oscilloscope
probe tip through the large via on the switch node (designed for this purpose) and
grounding the probe directly across the GND terminals provided. See Figure 3 for proper
scope probe technique.
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 |
Figure 2: Proper Connection and Measurement Setup
|2
QUICK START GUIDE
Demonstration System EPC9049
EPC9049,
49, 60 V
60DEVELOPMENTBOARD
Do not use probe ground lead
Ground probe
against TP3
Minimize loop
Place probe tip in large via at OUT
Figure 3: Proper Measurement of Switch Node – OUT
THERMAL CONSIDERATIONS
The EPC9049 development boards showcase the EPC2035 eGaN FETs. These development boards are 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 EPC9049 development boards do not have any current or thermal protection on board.
500 MHz ringing
5V
1.3 ns rise time
1.5 ns fall time
Figure 4: Typical Waveforms for EPC9049 VIN = 48 V to 5V/4 A (1000 kHz) Buck converter showing rising and falling edges,
CH1: (VPWM) Input logic signal – CH2: (IOUT) Output inductor current – CH4: (VOUT) Switch node voltage
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 |
|3
QUICK START GUIDE
Demonstration System EPC9049
Table 2: Bill of Material
Item
Qty
Reference
Part Description
Manufacturer / Part#
1
3
C4, C10, C11,
Capacitor, 1 µF, 10%, 25 V, X5R
Murata, GRM188R61E105KA12D
2
2
C9, C19
Capacitor, 0.1 µF, 10%, 25 V, X5R
TDK, C1005X5R1E104K
3
2
C16, C17
Capacitor, 100 pF, 5%, 50 V, NP0
Kemet, C0402C101K5GACTU
4
1
C21
Capacitor, 1 µF, 10%, 100 V, X7R
TDK, CGA4J3X7S2A105K125AE
5
2
D1, D2
Schottky Diode, 30 V
Diodes Inc., SDM03U40-7
6
3
J1, J2, J9
Connector
2 pins of Tyco, 4-103185-0
7
1
J3, J4, J5, J6, J7, J8
Connector
FCI, 68602-224HLF
8
2
Q1, Q2
60 V eGaN® FET
EPC2035
9
1
R1
Resistor, 10.0 k, 5%, 1/8 W
Stackpole, RMCF0603FT10K0
10
2
R2, R15
Resistor, 0 Ohm, 1/8 W
Stackpole, RMCF0603ZT0R00
11
1
R4
Resistor, 33 Ohm, 1%, 1/8 W
Stackpole, RMCF0603FT33R0
12
1
R5
Resistor, 47 Ohm, 1%, 1/8 W
Stackpole, RMCF0603FT47R0
13
4
R19, R20, R23, R24
Resistor, 1 Ohm, 1/16 W
Stackpole, RMCF0402FT1R00
14
2
TP1, TP2
Test Point
Keystone Elect, 5015
15
1
TP3
Connector
1/40th of Tyco, 4-103185-0
16
1
U1
I.C., Logic
Fairchild, NC7SZ00L6X
17
1
U2
I.C., Gate driver
Texas Instruments, LM5113
18
1
U3
I.C., Regulator
Microchip, MCP1703T-5002E/MC
19
1
U4
I.C., Logic
Fairchild, NC7SZ08L6X
20
0
R14
Optional Resistor
21
0
P1, P2
Optional Potentiometer
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 |
|4
QUICK START GUIDE
J1
1
2
CON2
8
U3
7
C10
1μF, 25 V
6
5
MCP1703
OUT 1
IN
NC
NC
NC
NC
NC
GND
VCC
2
3
C11
1μF, 25 V
C4
1μF, 25 V
4
GND
9
J2
TP2
Keystone 5015
PWM1
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 |
7 - 12 Vdc
U1
1
2
A
CON2
J9
R1
10 k
1
2
R2
Zero
J6
CON4
U4
VDD
P1
Optional
B
GND
P2
Optional
2
J3 1 2 3 4
CON4
D1
Y
NC7SZ08L6X
U2
SDM03U40
R4
SW OUT
0.1 μF, 25 V
C9
R19
33
2
1Ω
TP3
1
C16
SDM03U40
R5
47.0
100 pF
R20
R24
C17
100 pF
LM5113TM
1Ω
C21
1μF, 100 V
J4 4 3 2 1
CON4
1Ω
R23
D2
Optional
4 3 2 1
60 V, EPC2035
Y
A
R15
Zero
1 2 3 4
See Table
Q1
NC7SZ00L6X
R14
1
VCC
VDD
B
GND
CON2
J5
CON4
Q2
60 V, EPC2035
1Ω
(Optional)
CON1
J7
CON4
1 2 3 4
0.1 μF, 25 V
C19
GND
4 3 2 1
J8
CON4
Development Board Schematic
EPC9049
Demonstration System EPC9049
1
TP1
Keystone 5015
|5
For More Information:
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or your local sales representative
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www.epc-co.com
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bit.ly/EPCupdates
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EPC Products are distributed through Digi-Key.
www.digikey.com
Demonstration Board Notification
The EPC9049 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 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 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.
