EPC9047 Quick Start Guide - Efficient Power Conversion

Development Board
EPC9047
Quick Start Guide
Half Bridge with Gate Drive
for EPC2033
DESCRIPTION
The EPC9047 development boards are in a half bridge topology with onboard gate drives, featuring
the EPC2033 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.
The development board is 2” x 1.5” and contains two eGaN FETs in a half bridge configuration using
the Texas Instruments UCC27611 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 EPC2033 eGaN FET please refer to the data sheet available from EPC at
www.epc-co.com. The data sheet should be read in conjunction with this quick start guide.
Table 1: Performance Summary (TA = 25°C)
SYMBOL
PARAMETER
VDD
Gate Drive Input Supply Range
VIN
CONDITIONS
MIN
MAX
UNITS
7
12
V
Bus Input Voltage Range
110
V
VOUT
Switch Node Output Voltage
150
V
IOUT
Switch Node Output Current
12*
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
100
ns
Minimum ‘Low’ State Input Pulse
Width
VPWM rise and fall time < 10ns
500#
ns
*Assumes inductive load, maximum current depends on die temperature – actual maximum current will be subject to
switching frequency, bus voltage and thermal management.
# Dependent on time needed to ‘refresh’ high side bootstrap supply voltage.
For More Information:
Please contact [email protected]
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
EPC Products are distributed
through Digi-Key.
www.digikey.com
Demonstration Board Notification
EPC9047 boards are intended for product evaluation purposes only and are not intended for commercial use. As evaluation tools, they are 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. No Licenses are implied or granted under any patent
right or other intellectual property whatsoever. EPC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual
property rights of any kind.
EPC reserves the right at any time, without notice, to change said circuitry and specifications.
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015
QUICK START GUIDE
EPC9047
QUICK START PROCEDURE
The development boards are easy to set up to evaluate the performance
of the eGaN FET. 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 of the half bridge OUT
(J3, J4) to your circuit as required.
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.
VDD
Gate Drive
Regulator
Enable
PWM Input
6. Turn on the bus voltage to the required value (do not exceed the
absolute maximum voltage of 150 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.
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.
Gate Drive Supply
Half Bridge
with Bypass
VIN
Level shift,
Dead-time
Adjust and
Gate Drive
OUT
Figure 1: Block Diagram of Development Board
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| PAGE 2
QUICK START GUIDE
EPC9047
QUICK START PROCEDURE
7 V – 12 V
_
47, 150
Additional bus capacitance
can be added on back
VDD Supply
+
Gate Drive Supply
(Note Polarity)
A
IIN
+
VIN
_
Switch Node
V
(For Efficiency
Measurement)
+
<110 V
VIN Supply
_
External Circuit
PWM Input
Figure 2: Proper Connection and Measurement Setup
47, 150
60
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
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 |
| PAGE 3
QUICK START GUIDE
EPC9047
10 V
500 MHz ringing
1.9 ns rise time
8.7 ns fall time
Figure 4 (a) – Rising Edge
Figure 4 (b) – Falling Edge
Figure 4: Typical Waveforms for EPC9047. VIN = 110 V to 5 V/12 A (100 kHz) Buck converter showing rising and falling edges,
CH1: (VPWM) Input logic signal – CH2: (IOUT) Output inductor current – CH4: (VOUT) Switch node voltage
THERMAL PERFORMANCE
The EPC9047 development boards showcase the EPC2033 eGaN FETs.
These development boards are intended for bench evaluation with low
ambient temperature and convection cooling. The addition of heatsinking and forced air cooling can significantly increase the current rating
Table 2: Bill of Materials
Item
Qty
of these devices, but care must be taken to not exceed the absolute
maximum die temperature of 150°C.
NOTE. The EPC9047 development boards do not have any current or
thermal protection on board.
Reference
Part Description
Manufacturer / Part #
1
5
C1, C2, C3, C10, C11
Capacitor, 1 µF, 10%, 25 V, X5R
Murata, GRM188R61E105KA12D
2
2
C6, C7
Capacitor, 100 pF, 5%, 50V, NP0
TDK, C1005X5R1E224K050BC
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
4
3
2
1
2
1
1
1
2
1
2
4
1
1
2
1
1
1
1
2
0
C8, C9, C12, C13
C16, C17, C18
D1, D2
D3
D4, D5
J1
J2
J3, J4, J5, J6, J7, J8
Q1, Q2
R1
R11, R12
R2, R3, R6, R15
R4
R5
TP1, TP2
TP3
U1
U2
U4
U6, U7
P1, P2
Capacitor, 0.22 µF, 10%, 25 V, X5R
Capacitor, 0.1 µF, 10%, 250 V, X7S
Schottky Diode, 30 V
Diode, 200 V
Diode, 40 V
Connector
Connector
Connector
eGaN® FET
Resistor, 10.0 K, 5%, 1/8 W
Resistor, 1 Ohm, 1%, 1/16 W
Resistor, 0 Ohm, 1/8 W
Resistor, 150 Ohm, 1%, 1/8 W
Resistor, 470 Ohm, 1%, 1/8 W
Test Point
Connector
I.C., Logic
400 LFM
I.C., Opto-coupler
I.C., Logic
I.C., Gate driver
Optional potentiometer
TDK, C2012X7T2E104K125AA
C2012X7T2E104K125AA
Diodes Inc., SDM03U40-7
Diodes Inc.,BAV21WS-7-F
Diodes Inc.,BAS40LP-7
2pins of Tyco, 4-103185-0
4pins of Tyco, 4-103185-0
FCI, 68602-224HLF
EPC2033
Stackpole, RMCF0603FT10K0
Stackpole, RMCF0402FT1R00
Stackpole, RMCF0603ZT00R0
Stackpole, RMCF0603FT150R
Stackpole, RMCF0603FT470R
Keystone Elect, 5015
1/40th of Tyco, 4-103185-0
Fairchild, NC7SZ00L6X
Silicon Labs, Si8610BC
Fairchild, NC7SZ08L6X
Texas Instruments, UCC27611
24
0
R14
Optional resistor
25
0
U5
Optional I.C.
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 |
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QUICK START GUIDE
EPC9047
7 - 12 Vdc
J1
D3
VDD
1
2
R6
Zero
BAV21
CON2
C10
1μF, 25V
PWM1
J2
PWM1
1
2
CON2
J9
1
2
R1
10k
1
2
3
CON2
U1
A
VDD
B
5
GND
NC7SZ00L6X
GND
Y
6
VCC
VCC
4
C11
1μF, 25V
DZH
1
C2
1μF, 25V
5
U4
A
2
B
3
GND
VDD
2
7
6
4
Optional
R15
Zero
DL
VREF
5
4
3
5
6
VSS
UCC27611
7
GDH1
D4 BAS40LP
1 ohm
J3
CON4
1 2 3 4
SW OUT
SDM03U40
R4
DH
VCC
VCC
1
470
DRL
C3
C7
J6
CON4
Q1
SW OUT
2
SDM03U40
R5
4 3 2 1
EPC2033
GDH
GDH2
R11
110V Max
1μF, 25V
U5
Zero
8
2
7
3
6
4
5
Optional
C9
0.22μF, 25V
DRLT
1
VDD
LDO
2
VREF
6
5
4
3
UCC27611
TP3
0.22μF, 25V
U7
1
0.22μF, 250V
J4
CON4
C13
VDD
C16
C17
C18
4 3 2 1
150
D2
R14
2
C8
0.22μF, 25V
SS8610BC
R3
P2
Optional
C1
1μF, 25V
DRHT
LDO
D1
NC7SZ08L6X
PWM2
VDD
1
J5
CON4
1 2 3 4
C12
0.22μF, 25V
U6
8
P1
2
Optional
6
5
Y
U2
C6 3
100p
4
DRH
R2
Zero
1
PWM1
PWM2
TP2
Keystone 5015
1
BC
VSS
7
D5 BAS40LP
GDL1
CON1
EPC9047
GDL
Q2
GDL2
J7
CON4
1 2 3 4
R12 1 ohm
100p
GND
GND
1
TP1
Keystone 5015
GND
4 3 2 1
J8
CON4
Figure 5: Development Board Schematic
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 |
| PAGE 5