EPC EPC9101 User manual

Demonstration Board EPC9101
Quick Start Guide
EPC2014 + EPC2015 1 MHz Buck Converter
DESCRIPTION
The EPC9101 demonstration board is a 1.2 V output, 1 MHz buck
converter with an 20 A maximum output current and 8 V to 24
V input voltage range. The demonstration board features the
EPC2014 and EPC2015 enhancement mode (eGaN®) eld eect
transistors (FETs), as well as the rst eGaN FET specic integrat-
ed circuit driver – the Texas Instruments LM5113. The EPC9101
board is not intended as a reference design, but to showcase
the performance that can be achieved using the eGaN FETs and
eGaN driver together.
Table 1: Performance Summary (TA = 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Bus Input Voltage Range 8 24 V
V
OUT
Switch Node Output Voltage 1.2 V
I
OUT
Switch Node Output Current 20* A
f
SW
Switching frequency 1000 kHz
Peak Eciency 12 V
IN
, = 10 A I
OUT
89.5 %
Full Load Eciency 12 V
IN
, = 20 A I
OUT
86.4 %
Full Load Eciency
24 V
IN
, = 20 A I
OUT
83.3 %
*Maximum limited by thermal considerations and requires 200 LFM forced air cooling
The EPC9101 demonstration board is 3” square and contains a
fully closed loop buck converter.
There are also various probe points to facilitate simple wave-
form measurement and eciency calculation. A complete block
diagram of the circuit is given in Figure 1. For more information
on the EPC2014/5 eGaN FETs or LM5113 driver, please refer to
the datasheet available from EPC at www.epc-co.com and www.
TI.com. These datasheets, as well that of the LT3833 controller
should be read in conjunction with this quick start guide.
Demonstration Board Notication
The EPC9101 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it 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. 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 specications.
V
IN
8 V - 24 V
V
OUT
1.2 V / 20 A
GND GND
5 V
LTC3833
Controller LM5113
Gate
Driver
Dead-Time
Adjust
Single sided layout power stage
Quick Start Procedure
Demonstration board EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 driver.
Refer to Figure 2 for proper connect and measurement setup and follow the procedure below:
1. With power o, connect the input power supply bus between VIN and GND banana jacks as shown.
2. With power o, connect the active (constant current) load as desired between VOUT and GND banana jacks as shown.
3. Turn on the supply voltage to the required value (do not exceed the absolute maximum voltage of 24 V on VIN).
4. Measure the output voltage to make sure the board is fully functional and operating no-load.
5. Turn on active load to the desired load current while staying below the maximum current (20 A)
6. Once operational, adjust the bus voltage and load current within the allowed operating range and observe the output switching behavior,
eciency and other parameters.
7. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node of gate voltage, care must be taken to avoid long ground leads. Measure these by placing the oscilloscope
probe tip on the top pad of D3 and grounding the probe directly across D3 on the bottom pad provided for switch node and using the bottom pad of R20 and the GND pad
below it for gate voltage. See Figure 3 for proper scope probe technique. Measuring the switch node with a high bandwidth ( ≥ 500MHz) probe and high bandwidth scope ( ≥
1GHz) is recommended.
NOTE. The dead-times for both the leading and trailing edges have been set for optimum full load eciency. Adjustment is not recommended, but can be done at own risk by
replacing R21 and R22 with potentiometers P1 and P2. This should be done while monitoring both the input current and switch-node voltage to determine the eect of these
adjustments. Under no circumstance should the input pins to the LM5113 be probed during operation as the added probe capacitance will change the device timing.
CIRCUIT PERFORMANCE
The EPC9101 demonstration circuit was designed to showcase the size and performance that can readily be achieved at 1 MHz operation
using eGaN FETs for supply voltages up to 24V or more. Since a closed loop controller is included on board, the associated losses must also
be lumped into any eciency measurement that is performed. It is possible to supply a separate regulated 5V supply to the EXTVCC pin
to further improve eciency. In that case, the controller and gate drive losses are still included, but the associated conversion loss from
the input supply (LDO loss) is removed.
Figure 4:Typical Switch node voltage for a 24V to 1.2 V/20 A (1 MHz) Buck converter
Figure 1: Block Diagram of EPC9101 Demonstration Board
Figure 2: Proper Connection and Measurement Setup
Figure 3: Proper Measurement of Switch Node or Gate Voltage
Do not use probe ground lead
Place probe tip on padMinimize loop
<24 V
EPC
EFFICIENT POWER CONVERSION
VOUT
+
–
V
VIN
+
–
V
IOUT
A
Active Load
IIN
VIN Supply
+
–
A
<20 V
www.epc-co.com
EPC Products are distributed exclusively through Digi-Key.
www.digikey.com
Contact us:
www.epc-co.com
Renee Yawger
WW Marketing
Oce: +1.908.475.5702
Mobile: [phone]
[e-mail]
Stephen Tsang
Sales, Asia
Mobile: [phone]
[e-mail]
Bhasy Nair
Global FAE Support
Oce: +1.972.805.8585
Mobile: [phone]
[e-mail]
Peter Cheng
FAE Support, Asia
Mobile: +886.938.009.706
[e-mail]

Demonstration Board EPC9101
Quick Start Guide
EPC2014 + EPC2015 1 MHz Buck Converter
DESCRIPTION
The EPC9101 demonstration board is a 1.2 V output, 1 MHz buck
converter with an 20 A maximum output current and 8 V to 24
V input voltage range. The demonstration board features the
EPC2014 and EPC2015 enhancement mode (eGaN®) eld eect
transistors (FETs), as well as the rst eGaN FET specic integrat-
ed circuit driver – the Texas Instruments LM5113. The EPC9101
board is not intended as a reference design, but to showcase
the performance that can be achieved using the eGaN FETs and
eGaN driver together.
Table 1: Performance Summary (TA = 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Bus Input Voltage Range 8 24 V
V
OUT
Switch Node Output Voltage 1.2 V
I
OUT
Switch Node Output Current 20* A
f
SW
Switching frequency 1000 kHz
Peak Eciency 12 V
IN
, = 10 A I
OUT
89.5 %
Full Load Eciency 12 V
IN
, = 20 A I
OUT
86.4 %
Full Load Eciency
24 V
IN
, = 20 A I
OUT
83.3 %
*Maximum limited by thermal considerations and requires 200 LFM forced air cooling
The EPC9101 demonstration board is 3” square and contains
a fully closed loop buck converter. The power stage is a single
sided design and is contained within 20mm x 11mm area and
includes driver, eGaN FETs, bus capacitors and output inductor.
There are also various probe points to facilitate simple waveform
measurement and eciency calculation. A complete block dia-
gram of the circuit is given in Figure 1. For more information on the
EPC2014/5 eGaN FETs or LM5113 driver, please refer to the data-
sheet available from EPC at www.epc-co.com and www.TI.com.
These datasheets, as well that of the LT3833 controller should be
read in conjunction with this quick start guide.
Demonstration Board Notication
The EPC9101 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it 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. 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 specications.
V
IN
8 V - 24 V
V
OUT
1.2 V / 20 A
GND GND
5 V
LTC3833
Controller LM5113
Gate
Driver
Dead-Time
Adjust
Single sided layout power stage
Quick Start Procedure
Demonstration board EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 driver.
Refer to Figure 2 for proper connect and measurement setup and follow the procedure below:
1. With power o, connect the input power supply bus between VIN and GND banana jacks as shown.
2. With power o, connect the active (constant current) load as desired between VOUT and GND banana jacks as shown.
3. Turn on the supply voltage to the required value (do not exceed the absolute maximum voltage of 24 V on VIN).
4. Measure the output voltage to make sure the board is fully functional and operating no-load.
5. Turn on active load to the desired load current while staying below the maximum current (20 A)
6. Once operational, adjust the bus voltage and load current within the allowed operating range and observe the output switching behavior,
eciency and other parameters.
7. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node of gate voltage, care must be taken to avoid long ground leads. Measure these by placing the oscilloscope
probe tip on the top pad of D3 and grounding the probe directly across D3 on the bottom pad provided for switch node and using the bottom pad of R20 and the GND pad
below it for gate voltage. See Figure 3 for proper scope probe technique. Measuring the switch node with a high bandwidth ( ≥ 500MHz) probe and high bandwidth scope ( ≥
1GHz) is recommended.
NOTE. The dead-times for both the leading and trailing edges have been set for optimum full load eciency. Adjustment is not recommended, but can be done at own risk by
replacing R21 and R22 with potentiometers P1 and P2. This should be done while monitoring both the input current and switch-node voltage to determine the eect of these
adjustments. Under no circumstance should the input pins to the LM5113 be probed during operation as the added probe capacitance will change the device timing.
CIRCUIT PERFORMANCE
The EPC9101 demonstration circuit was designed to showcase the size and performance that can readily be achieved at 1 MHz operation
using eGaN FETs for supply voltages up to 24V or more. Since a closed loop controller is included on board, the associated losses must also
be lumped into any eciency measurement that is performed. It is possible to supply a separate regulated 5V supply to the EXTVCC pin
to further improve eciency. In that case, the controller and gate drive losses are still included, but the associated conversion loss from
the input supply (LDO loss) is removed.
Figure 4:Typical Switch node voltage for a 24V to 1.2 V/20 A (1 MHz) Buck converter
Figure 1: Block Diagram of EPC9101 Demonstration Board
Figure 2: Proper Connection and Measurement Setup
Figure 3: Proper Measurement of Switch Node or Gate Voltage
Do not use probe ground lead
Place probe tip on padMinimize loop
<24 V
EPC
EFFICIENT POWER CONVERSION
VOUT
+
–
V
VIN
+
–
V
IOUT
A
Active Load
IIN
VIN Supply
+
–
A
<20 V
www.epc-co.com
EPC Products are distributed exclusively through Digi-Key.
www.digikey.com
Contact us:
www.epc-co.com
Renee Yawger
WW Marketing
Oce: +1.908.475.5702
Mobile: [phone]
[e-mail]
Stephen Tsang
Sales, Asia
Mobile: [phone]
[e-mail]
Bhasy Nair
Global FAE Support
Oce: +1.972.805.8585
Mobile: [phone]
[e-mail]
Peter Cheng
FAE Support, Asia
Mobile: +886.938.009.706
[e-mail]

Demonstration Board EPC9101
Quick Start Guide
EPC2014 + EPC2015 1 MHz Buck Converter
DESCRIPTION
The EPC9101 demonstration board is a 1.2 V output, 1 MHz buck
converter with an 20 A maximum output current and 8 V to 24
V input voltage range. The demonstration board features the
EPC2014 and EPC2015 enhancement mode (eGaN®) eld eect
transistors (FETs), as well as the rst eGaN FET specic integrat-
ed circuit driver – the Texas Instruments LM5113. The EPC9101
board is not intended as a reference design, but to showcase
the performance that can be achieved using the eGaN FETs and
eGaN driver together.
Table 1: Performance Summary (TA = 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Bus Input Voltage Range 8 24 V
V
OUT
Switch Node Output Voltage 1.2 V
I
OUT
Switch Node Output Current 20* A
f
SW
Switching frequency 1000 kHz
Peak Eciency 12 V
IN
, = 10 A I
OUT
89.5 %
Full Load Eciency 12 V
IN
, = 20 A I
OUT
86.4 %
Full Load Eciency
24 V
IN
, = 20 A I
OUT
83.3 %
*Maximum limited by thermal considerations and requires 200 LFM forced air cooling
The EPC9101 demonstration board is 3” square and contains a
fully closed loop buck converter.
There are also various probe points to facilitate simple wave-
form measurement and eciency calculation. A complete block
diagram of the circuit is given in Figure 1. For more information
on the EPC2014/5 eGaN FETs or LM5113 driver, please refer to
the datasheet available from EPC at www.epc-co.com and www.
TI.com. These datasheets, as well that of the LT3833 controller
should be read in conjunction with this quick start guide.
Demonstration Board Notication
The EPC9101 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it 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. 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 specications.
V
IN
8 V - 24 V
V
OUT
1.2 V / 20 A
GND GND
5 V
LTC3833
Controller LM5113
Gate
Driver
Dead-Time
Adjust
Single sided layout power stage
Quick Start Procedure
Demonstration board EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 driver.
Refer to Figure 2 for proper connect and measurement setup and follow the procedure below:
1. With power o, connect the input power supply bus between VIN and GND banana jacks as shown.
2. With power o, connect the active (constant current) load as desired between VOUT and GND banana jacks as shown.
3. Turn on the supply voltage to the required value (do not exceed the absolute maximum voltage of 24 V on VIN).
4. Measure the output voltage to make sure the board is fully functional and operating no-load.
5. Turn on active load to the desired load current while staying below the maximum current (20 A)
6. Once operational, adjust the bus voltage and load current within the allowed operating range and observe the output switching behavior,
eciency and other parameters.
7. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node of gate voltage, care must be taken to avoid long ground leads. Measure these by placing the oscilloscope
probe tip on the top pad of D3 and grounding the probe directly across D3 on the bottom pad provided for switch node and using the bottom pad of R20 and the GND pad
below it for gate voltage. See Figure 3 for proper scope probe technique. Measuring the switch node with a high bandwidth ( ≥ 500MHz) probe and high bandwidth scope ( ≥
1GHz) is recommended.
NOTE. The dead-times for both the leading and trailing edges have been set for optimum full load eciency. Adjustment is not recommended, but can be done at own risk by
replacing R21 and R22 with potentiometers P1 and P2. This should be done while monitoring both the input current and switch-node voltage to determine the eect of these
adjustments. Under no circumstance should the input pins to the LM5113 be probed during operation as the added probe capacitance will change the device timing.
CIRCUIT PERFORMANCE
The EPC9101 demonstration circuit was designed to showcase the size and performance that can readily be achieved at 1 MHz operation
using eGaN FETs for supply voltages up to 24V or more. Since a closed loop controller is included on board, the associated losses must also
be lumped into any eciency measurement that is performed. It is possible to supply a separate regulated 5V supply to the EXTVCC pin
to further improve eciency. In that case, the controller and gate drive losses are still included, but the associated conversion loss from
the input supply (LDO loss) is removed.
Figure 4:Typical Switch node voltage for a 24V to 1.2 V/20 A (1 MHz) Buck converter
Figure 1: Block Diagram of EPC9101 Demonstration Board
Figure 2: Proper Connection and Measurement Setup
Figure 3: Proper Measurement of Switch Node or Gate Voltage
Do not use probe ground lead
Place probe tip on padMinimize loop
<24 V
EPC
EFFICIENT POWER CONVERSION
VOUT
+
–
V
VIN
+
–
V
IOUT
A
Active Load
IIN
VIN Supply
+
–
A
<20 V
www.epc-co.com
EPC Products are distributed exclusively through Digi-Key.
www.digikey.com
Contact us:
www.epc-co.com
Renee Yawger
WW Marketing
Oce: +1.908.475.5702
Mobile: [phone]
[e-mail]
Stephen Tsang
Sales, Asia
Mobile: [phone]
[e-mail]
Bhasy Nair
Global FAE Support
Oce: +1.972.805.8585
Mobile: [phone]
[e-mail]
Peter Cheng
FAE Support, Asia
Mobile: +886.938.009.706
[e-mail]

Demonstration Board EPC9101
Quick Start Guide
EPC2014 + EPC2015 1 MHz Buck Converter
DESCRIPTION
The EPC9101 demonstration board is a 1.2 V output, 1 MHz buck
converter with an 20 A maximum output current and 8 V to 24
V input voltage range. The demonstration board features the
EPC2014 and EPC2015 enhancement mode (eGaN®) eld eect
transistors (FETs), as well as the rst eGaN FET specic integrat-
ed circuit driver – the Texas Instruments LM5113. The EPC9101
board is not intended as a reference design, but to showcase
the performance that can be achieved using the eGaN FETs and
eGaN driver together.
Table 1: Performance Summary (TA = 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Bus Input Voltage Range 8 24 V
V
OUT
Switch Node Output Voltage 1.2 V
I
OUT
Switch Node Output Current 20* A
f
SW
Switching frequency 1000 kHz
Peak Eciency 12 V
IN
, = 10 A I
OUT
89.5 %
Full Load Eciency 12 V
IN
, = 20 A I
OUT
86.4 %
Full Load Eciency
24 V
IN
, = 20 A I
OUT
83.3 %
*Maximum limited by thermal considerations and requires 200 LFM forced air cooling
The EPC9101 demonstration board is 3” square and contains a
fully closed loop buck converter.
There are also various probe points to facilitate simple wave-
form measurement and eciency calculation. A complete block
diagram of the circuit is given in Figure 1. For more information
on the EPC2014/5 eGaN FETs or LM5113 driver, please refer to
the datasheet available from EPC at www.epc-co.com and www.
TI.com. These datasheets, as well that of the LT3833 controller
should be read in conjunction with this quick start guide.
Demonstration Board Notication
The EPC9101 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it 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. 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 specications.
V
IN
8 V - 24 V
V
OUT
1.2 V / 20 A
GND GND
5 V
LTC3833
Controller LM5113
Gate
Driver
Dead-Time
Adjust
Single sided layout power stage
Quick Start Procedure
Demonstration board EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 driver.
Refer to Figure 2 for proper connect and measurement setup and follow the procedure below:
1. With power o, connect the input power supply bus between VIN and GND banana jacks as shown.
2. With power o, connect the active (constant current) load as desired between VOUT and GND banana jacks as shown.
3. Turn on the supply voltage to the required value (do not exceed the absolute maximum voltage of 24 V on VIN).
4. Measure the output voltage to make sure the board is fully functional and operating no-load.
5. Turn on active load to the desired load current while staying below the maximum current (20 A)
6. Once operational, adjust the bus voltage and load current within the allowed operating range and observe the output switching behavior,
eciency and other parameters.
7. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node of gate voltage, care must be taken to avoid long ground leads. Measure these by placing the oscilloscope
probe tip on the top pad of D3 and grounding the probe directly across D3 on the bottom pad provided for switch node and using the bottom pad of R20 and the GND pad
below it for gate voltage. See Figure 3 for proper scope probe technique. Measuring the switch node with a high bandwidth ( ≥ 500MHz) probe and high bandwidth scope ( ≥
1GHz) is recommended.
NOTE. The dead-times for both the leading and trailing edges have been set for optimum full load eciency. Adjustment is not recommended, but can be done at own risk by
replacing R21 and R22 with potentiometers P1 and P2. This should be done while monitoring both the input current and switch-node voltage to determine the eect of these
adjustments. Under no circumstance should the input pins to the LM5113 be probed during operation as the added probe capacitance will change the device timing.
CIRCUIT PERFORMANCE
The EPC9101 demonstration circuit was designed to showcase the size and performance that can readily be achieved at 1 MHz operation
using eGaN FETs for supply voltages up to 24V or more. Since a closed loop controller is included on board, the associated losses must also
be lumped into any eciency measurement that is performed. It is possible to supply a separate regulated 5V supply to the EXTVCC pin
to further improve eciency. In that case, the controller and gate drive losses are still included, but the associated conversion loss from
the input supply (LDO loss) is removed.
Figure 4:Typical Switch node voltage for a 24V to 1.2 V/20 A (1 MHz) Buck converter
Figure 1: Block Diagram of EPC9101 Demonstration Board
Figure 2: Proper Connection and Measurement Setup
Figure 3: Proper Measurement of Switch Node or Gate Voltage
Do not use probe ground lead
Place probe tip on padMinimize loop
<24 V
EPC
EFFICIENT POWER CONVERSION
VOUT
+
–
V
VIN
+
–
V
IOUT
A
Active Load
IIN
VIN Supply
+
–
A
<20 V
www.epc-co.com
EPC Products are distributed exclusively through Digi-Key.
www.digikey.com
Contact us:
www.epc-co.com
Renee Yawger
WW Marketing
Oce: +1.908.475.5702
Mobile: [phone]
[e-mail]
Stephen Tsang
Sales, Asia
Mobile: [phone]
[e-mail]
Bhasy Nair
Global FAE Support
Oce: +1.972.805.8585
Mobile: [phone]
[e-mail]
Peter Cheng
FAE Support, Asia
Mobile: +886.938.009.706
[e-mail]

1 1
2 2
3 3
4 4
5 5
6 6
DD
CC
BB
AA
C8 4.7uF, 10V
C9 0.1uF, 25V
Vosns-
1
Vosns+
2
Trk/ss
3
ITH
4
Vrng
5
RT
6
Run
7
ExtVCC
8
Mode/PLL
9
Vin
10
IntVCC 11
PGND 12
BG 13
SW 14
TG 15
Boost 16
PGood 17
Sns+ 18
Sns- 19
Vout 20
SGND 21
U1
LTC3833
GND
J4
GND
J2
VIN
J1
1.2 V / 20 A
VOUT
J3
R2
15k
C3
22pF
C1
220pF
R12
100k
R11
560k
RUN VIN
R13
1k
MODE
VCC
VOUT
VOUT
RUN
VCC
MODE
VIN
VIN
C5
4.7uF, 10V
R9
2.2
C7
0.1uF, 25V
R10
10.0k
PGOOD
PGOOD
C2
0.1uF, 25V
TRK/SS
R4
10.0k
R3
10.0k
VOUT
Remote sensing
R8
39.2k
R7
Zero
R5
Opt
VCC
R16
Opt
R15
680
S- S+
S-
S+
C4
0.1uF, 25V
C15 0.1uF, 25V
SJ3
R22
47
C17
100pF
D2
SDM03U40 R21
22
D1
SDM03U40
C16
100pF
R19
0 Ohm
R20
0 Ohm
2
P1
optional
2
P2
optional
C18
Optional
1
TP3
Keystone 5015
1
TP4
Keystone 5015
1
TP1
Keystone 5015
1
TP2
Keystone 5015
R14
1k
C6
Optional
1
TP5 Keystone 5015
SYNC
1
TP6
Keystone 5015
RUN
1
TP7 Keystone 5015
PGOOD
TRK/SS
1
TP8 Keystone 5015
TRACK
C10
10uF, 35V
Q2 EPC2015
C22 C23 C11
4.7uF, 35V
U2 LM5113TM
C19
0.1uF, 25V
SJ4
SJ1 SJ2
GND A
B
Y
VDD
U3 NC7SZ00L6X
VCC
C24
47uF, 6.3V
EXT
EXT
1
TP9
Keystone 5015
C12
47pF
EPC2014 Q1
L1
270nH
C14 C13 C20
C21
D3
Optional
Table 2 : Bill of Material
Item Qty Reference Part Description Manufacturer / Part #
1 1 C1 Capacitor, 220pF, 5%, 50V, NP0 Murata, GRM1885C1H221JA01D
2 1 C3 Capacitor, 22pF, 5%, 50V, NP0 Murata, GRM1885C1H220JA01D
3 6 C2, C4, C7, C9, C15, C19 Capacitor, 0.1uF, 10%, 25V, X5R TDK, C1005X5R1E104K
4 2 C5, C8 Capacitor, 4.7uF, 10%, 10V, X5R TDK, C1608X5R1A475K
5 1 C10 Capacitor, 10uF, 20%, 35V, X5R Taiyo Yuden, GMK325BJ106KN
6 2 C11, C22, C23 Capacitor, 4.7uF, 10%, 35V, X7R TDK, C2012X6S1V475K125AB
7 5 C13, C14, C20, C21, C24 Capacitor, 47uF, 20%, 10V, X5R TDK, C2012X5R1A476M
8 2 C16, C17 Capacitor, 100pF, 5%, 50V, NP0 Kemet, C0402C101K5GACTU
9 3 D1, D2, D4 Schottky Diode, 30V Diodes Inc., SDM03U40-7
10 4 J1, J2, J3, J4 Banana Jack Keystone, 575-4
11 1 L1 Inductor, 270nH Coilcraft, SLC1175-271ME
12 1 Q1 eGaN® FET EPC, EPC2014
13 1 Q2 eGaN® FET EPC, EPC2015
14 1 R2 Resistor, 15.0K, 1%, 1/8W Stackpole, RMCF0603FT15K0
15 3 R3, R4, R10 Resistor, 10.0K, 1%, 1/10W Stackpole, RMCF0603FT10K0
16 3 R7, R19, R20 Resistor, 0 Ohm, 1/16W Stackpole, RMCF0402ZT0R00
17 1 R8 Resistor, 39.2K, 1%, 1/8W Stackpole, RMCF0603FT39K2
18 1 R9 Resistor, 2.2 Ohm, 5%, 1/16W Yageo, RC0402FR-072R2L
19 1 R11 Resistor, 560K, 1%, 1/8W Stackpole, RMCF0603FT560K
20 1 R12 Resistor, 100K, 1%, 1/8W Stackpole, RMCF0603FT100K
21 2 R13, R14 Resistor, 1.00K, 5%, 1/10W Rohm, MCR03EZPJ102
22 1 R15 Resistor, 680 Ohm, 5%, 1/8W Stackpole, RMCF0603FT680R
23 1 R21 Resistor, 22 Ohm, 5%, 1/8W Stackpole, RMCF0603JT22R0
24 1 R22 Resistor, 47 Ohm, 5%, 1/8W Stackpole, RMCF0603JT47R0
25 9 TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 Measurement Point Keystone Elect, 5015
26 1 U1 I.C., Buck Regulator Linear Technology, LTC3833EUDC#PBF
27 1 U2 I.C., Gate driver Texas Instruments, LM5113
28 1 U3 I.C., Logic Fairchild, NC7SZ00L6X
29 4 Nylon Stand-os Keystone, 8834
30 0 R5, R16 Optional Resistors
31 0 C6, C12, C18 Optional Capacitors
32 0 D3 Optional Diode
33 0 P1, P2 Potentiometer, 500 Ohm, 0.25W Murata, PV37Y501C01B00
34 0 SJ1, SJ2, SJ3, SJ4 Optional SMA Connectors
THERMAL CONSIDERATIONS
The EPC9101 demonstration board thermal images for steady
state full load operation are shown in Figure 6. The EPC9101 is
intended for bench evaluation with low ambient temperature
and forced air cooling for higher currents. Care must be taken
to not exceed the absolute maximum die temperature of 125°C
and stay within the constraints of the other components within
the circuit.
NOTE. The EPC9101 demonstration board does not have any current or thermal
protection on board.
Figure 6:Thermal images of EPC9101 under full load conditions
Figure 5:Typical eciency curves for 24 V, 19V and 12 V input including controller and
LDO losses
81
82
83
78
79
80
84
85
86
87
88
89
90
91
92
Eciency
0 2 4 6 8 10 12 18 2014 16
Output Current (A)
12 VIN
19 VIN
24 VIN
12 VIN, 20 AOUT, 200LFM
24 VIN, 20 AOUT, 200LFM
Demonstration Board – EPC9101 Schematic
Rev. 2.0

1 1
2 2
3 3
4 4
5 5
6 6
DD
CC
BB
AA
C8 4.7uF, 10V
C9 0.1uF, 25V
Vosns-
1
Vosns+
2
Trk/ss
3
ITH
4
Vrng
5
RT
6
Run
7
ExtVCC
8
Mode/PLL
9
Vin
10
IntVCC 11
PGND 12
BG 13
SW 14
TG 15
Boost 16
PGood 17
Sns+ 18
Sns- 19
Vout 20
SGND 21
U1
LTC3833
GND
J4
GND
J2
VIN
J1
1.2 V / 20 A
VOUT
J3
R2
15k
C3
22pF
C1
220pF
R12
100k
R11
560k
RUN VIN
R13
1k
MODE
VCC
VOUT
VOUT
RUN
VCC
MODE
VIN
VIN
C5
4.7uF, 10V
R9
2.2
C7
0.1uF, 25V
R10
10.0k
PGOOD
PGOOD
C2
0.1uF, 25V
TRK/SS
R4
10.0k
R3
10.0k
VOUT
Remote sensing
R8
39.2k
R7
Zero
R5
Opt
VCC
R16
Opt
R15
680
S- S+
S-
S+
C4
0.1uF, 25V
C15 0.1uF, 25V
SJ3
R22
47
C17
100pF
D2
SDM03U40 R21
22
D1
SDM03U40
C16
100pF
R19
0 Ohm
R20
0 Ohm
2
P1
optional
2
P2
optional
C18
Optional
1
TP3
Keystone 5015
1
TP4
Keystone 5015
1
TP1
Keystone 5015
1
TP2
Keystone 5015
R14
1k
C6
Optional
1
TP5 Keystone 5015
SYNC
1
TP6
Keystone 5015
RUN
1
TP7 Keystone 5015
PGOOD
TRK/SS
1
TP8 Keystone 5015
TRACK
C10
10uF, 35V
Q2 EPC2015
C22 C23 C11
4.7uF, 35V
U2 LM5113TM
C19
0.1uF, 25V
SJ4
SJ1 SJ2
GND A
B
Y
VDD
U3 NC7SZ00L6X
VCC
C24
47uF, 6.3V
EXT
EXT
1
TP9
Keystone 5015
C12
47pF
EPC2014 Q1
L1
270nH
C14 C13 C20
C21
D3
Optional
Table 2 : Bill of Material
Item Qty Reference Part Description Manufacturer / Part #
1 1 C1 Capacitor, 220pF, 5%, 50V, NP0 Murata, GRM1885C1H221JA01D
2 1 C3 Capacitor, 22pF, 5%, 50V, NP0 Murata, GRM1885C1H220JA01D
3 6 C2, C4, C7, C9, C15, C19 Capacitor, 0.1uF, 10%, 25V, X5R TDK, C1005X5R1E104K
4 2 C5, C8 Capacitor, 4.7uF, 10%, 10V, X5R TDK, C1608X5R1A475K
5 1 C10 Capacitor, 10uF, 20%, 35V, X5R Taiyo Yuden, GMK325BJ106KN
6 2 C11, C22, C23 Capacitor, 4.7uF, 10%, 35V, X7R TDK, C2012X6S1V475K125AB
7 5 C13, C14, C20, C21, C24 Capacitor, 47uF, 20%, 10V, X5R TDK, C2012X5R1A476M
8 2 C16, C17 Capacitor, 100pF, 5%, 50V, NP0 Kemet, C0402C101K5GACTU
9 3 D1, D2, D4 Schottky Diode, 30V Diodes Inc., SDM03U40-7
10 4 J1, J2, J3, J4 Banana Jack Keystone, 575-4
11 1 L1 Inductor, 270nH Coilcraft, SLC1175-271ME
12 1 Q1 eGaN® FET EPC, EPC2014
13 1 Q2 eGaN® FET EPC, EPC2015
14 1 R2 Resistor, 15.0K, 1%, 1/8W Stackpole, RMCF0603FT15K0
15 3 R3, R4, R10 Resistor, 10.0K, 1%, 1/10W Stackpole, RMCF0603FT10K0
16 3 R7, R19, R20 Resistor, 0 Ohm, 1/16W Stackpole, RMCF0402ZT0R00
17 1 R8 Resistor, 39.2K, 1%, 1/8W Stackpole, RMCF0603FT39K2
18 1 R9 Resistor, 2.2 Ohm, 5%, 1/16W Yageo, RC0402FR-072R2L
19 1 R11 Resistor, 560K, 1%, 1/8W Stackpole, RMCF0603FT560K
20 1 R12 Resistor, 100K, 1%, 1/8W Stackpole, RMCF0603FT100K
21 2 R13, R14 Resistor, 1.00K, 5%, 1/10W Rohm, MCR03EZPJ102
22 1 R15 Resistor, 680 Ohm, 5%, 1/8W Stackpole, RMCF0603FT680R
23 1 R21 Resistor, 22 Ohm, 5%, 1/8W Stackpole, RMCF0603JT22R0
24 1 R22 Resistor, 47 Ohm, 5%, 1/8W Stackpole, RMCF0603JT47R0
25 9 TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 Measurement Point Keystone Elect, 5015
26 1 U1 I.C., Buck Regulator Linear Technology, LTC3833EUDC#PBF
27 1 U2 I.C., Gate driver Texas Instruments, LM5113
28 1 U3 I.C., Logic Fairchild, NC7SZ00L6X
29 4 Nylon Stand-os Keystone, 8834
30 0 R5, R16 Optional Resistors
31 0 C6, C12, C18 Optional Capacitors
32 0 D3 Optional Diode
33 0 P1, P2 Potentiometer, 500 Ohm, 0.25W Murata, PV37Y501C01B00
34 0 SJ1, SJ2, SJ3, SJ4 Optional SMA Connectors
THERMAL CONSIDERATIONS
The EPC9101 demonstration board thermal images for steady
state full load operation are shown in Figure 6. The EPC9101 is
intended for bench evaluation with low ambient temperature
and forced air cooling for higher currents. Care must be taken
to not exceed the absolute maximum die temperature of 125°C
and stay within the constraints of the other components within
the circuit.
NOTE. The EPC9101 demonstration board does not have any current or thermal
protection on board.
Figure 6:Thermal images of EPC9101 under full load conditions
Figure 5:Typical eciency curves for 24 V, 19V and 12 V input including
controller and LDO losses
81
82
83
78
79
80
84
85
86
87
88
89
90
91
92
Eciency
0 2 4 6 8 10 12 18 2014 16
Output Current (A)
12 VIN
19 VIN
24 VIN
12 VIN, 20 AOUT, 200LFM
24 VIN, 20 AOUT, 200LFM
Demonstration Board – EPC9101 Schematic
Rev. 2.0

1
1
2
2
3
3
4
4
5
5
6
6
DD
CC
BB
AA
C8
4.7uF, 10V
C9
0.1uF, 25V
Vosns-
1
Vosns+
2
Trk/ss
3
ITH
4
Vrng
5
RT
6
Run
7
ExtVCC
8
Mode/PLL
9
Vin
10
IntVCC 11
PGND 12
BG 13
SW 14
TG 15
Boost 16
PGood 17
Sns+ 18
Sns- 19
Vout 20
SGND 21
U1
LTC3833
GND
J4
GND
J2
VIN
J1
1.2 V / 20 A
VOUT
J3
R2
15k
C3
22pF
C1
220pF
R12
100k
R11
560k
RUN VIN
R13
1k
MODE
VCC
VOUT
VOUT
RUN
VCC
MODE
VIN
VIN
C5
4.7uF, 10V
R9
2.2
C7
0.1uF, 25V
R10
10.0k
PGOOD
PGOOD
C2
0.1uF, 25V
TRK/SS
R4
10.0k
R3
10.0k
VOUT
Remote sensing
R8
39.2k
R7
Zero
R5
Opt
VCC
R16
Opt
R15
680
S- S+
S-
S+
C4
0.1uF, 25V
C15
0.1uF, 25V
SJ3
R22
47
C17
100pF
D2
SDM03U40
R21
22
D1
SDM03U40
C16
100pF
R19
0 Ohm
R20
0 Ohm
2
P1
optional
2
P2
optional
C18
Optional
1
TP3
Keystone 5015
1
TP4
Keystone 5015
1
TP1
Keystone 5015
1
TP2
Keystone 5015
R14
1k
C6
Optional
1
TP5
Keystone 5015
SYNC
1
TP6
Keystone 5015
RUN
1
TP7
Keystone 5015
PGOOD
TRK/SS
1
TP8
Keystone 5015
TRACK
C10
10uF, 35V
Q2
EPC2015
C22 C23
C11
4.7uF, 35V
U2
LM5113TM
C19
0.1uF, 25V
SJ4
SJ1 SJ2
GND
A
B
Y
VDD
U3
NC7SZ00L6X
VCC
C24
47uF, 10V
EXT
EXT
1
TP9
Keystone 5015
C12
Optional
EPC2014
Q1
L1
270nH
C14
C13 C20
C21
D3
Optional
Table 2 : Bill of Material
Item Qty Reference Part Description Manufacturer / Part #
1
1 C1 Capacitor, 220pF, 5%, 50V, NP0 Murata, GRM1885C1H221JA01D
2 1 C3 Capacitor, 22pF, 5%, 50V, NP0 Murata, GRM1885C1H220JA01D 3 6 C2, C4, C7, C9, C15, C19 Capacitor, 0.1uF, 10%, 25V, X5R TDK, C1005X5R1E104K 4 2 C5, C8 Capacitor, 4.7uF, 10%, 10V, X5R TDK, C1608X5R1A475K 5 1 C10 Capacitor, 10uF, 20%, 35V, X5R Taiyo Yuden, GMK325BJ106KN 6 2 C11, C22, C23 Capacitor, 4.7uF, 10%, 35V, X7R TDK, C2012X6S1V475K125AB 7 5 C13, C14, C20, C21, C24 Capacitor, 47uF, 20%, 10V, X5R TDK, C2012X5R1A476M 8 2 C16, C17 Capacitor, 100pF, 5%, 50V, NP0 Kemet, C0402C101K5GACTU 9 3 D1, D2, D4 Schottky Diode, 30V Diodes Inc., SDM03U40-7
10 4 J1, J2, J3, J4 Banana Jack Keystone, 575-4 11 1 L1 Inductor, 270nH Coilcraft, SLC1175-271ME 12 1 Q1 eGaN® FET EPC, EPC2014 13 1 Q2 eGaN® FET EPC, EPC2015 14 1 R2 Resistor, 15.0K, 1%, 1/8W Stackpole, RMCF0603FT15K0 15 3 R3, R4, R10 Resistor, 10.0K, 1%, 1/10W Stackpole, RMCF0603FT10K0 16 3 R7, R19, R20 Resistor, 0 Ohm, 1/16W Stackpole, RMCF0402ZT0R00 17 1 R8 Resistor, 39.2K, 1%, 1/8W Stackpole, RMCF0603FT39K2 18 1 R9 Resistor, 2.2 Ohm, 5%, 1/16W Yageo, RC0402FR-072R2L 19 1 R11 Resistor, 560K, 1%, 1/8W Stackpole, RMCF0603FT560K 20 1 R12 Resistor, 100K, 1%, 1/8W Stackpole, RMCF0603FT100K 21 2 R13, R14 Resistor, 1.00K, 5%, 1/10W Rohm, MCR03EZPJ102 22 1 R15 Resistor, 680 Ohm, 5%, 1/8W Stackpole, RMCF0603FT680R 23 1 R21 Resistor, 22 Ohm, 5%, 1/8W Stackpole, RMCF0603JT22R0 24 1 R22 Resistor, 47 Ohm, 5%, 1/8W Stackpole, RMCF0603JT47R0 25 9 TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 Measurement Point Keystone Elect, 5015 26 1 U1 I.C., Buck Regulator Linear Technology, LTC3833EUDC#PBF 27 1 U2 I.C., Gate driver Texas Instruments, LM5113 28 1 U3 I.C., Logic Fairchild, NC7SZ00L6X 29 4 Nylon Stand-os Keystone, 8834 30 0 R5, R16 Optional Resistors 31 0 C6, C12, C18 Optional Capacitors 32 0 D3 Optional Diode 33 0 P1, P2 Potentiometer, 500 Ohm, 0.25W Murata, PV37Y501C01B00 34 0 SJ1, SJ2, SJ3, SJ4 Optional SMA Connectors
THERMAL CONSIDERATIONS The EPC9101 demonstration board thermal images for steady state full load operation are shown in Figure 6. The EPC9101 is intended for bench evaluation with low ambient temperature and forced air cooling for higher currents. Care must be taken to not exceed the absolute maximum die temperature of 125°C and stay within the constraints of the other components within the circuit. NOTE. The EPC9101 demonstration board does not have any current or thermal protection on board.
Figure 6:Thermal images of EPC9101 under full load conditions
Figure 5:Typical eciency curves for 24 V, 19V and 12 V input including controller and LDO losses
81 82 83 78 79 80 84 85 86 87 88 89 90 91 92
Eciency
0 2 4 6 8 10 12 18 2014 16
Output Current (A)
12 VIN 19 VIN 24 VIN
12 VIN, 20 AOUT, 200LFM
24 VIN, 20 AOUT, 200LFM
Demonstration Board – EPC9101 Schematic
Rev. 2.0

Demonstration Board EPC9101
Quick Start Guide
EPC2014 + EPC2015 1 MHz Buck Converter
DESCRIPTION
The EPC9101 demonstration board is a 1.2 V output, 1 MHz buck
converter with an 20 A maximum output current and 8 V to 24
V input voltage range. The demonstration board features the
EPC2014 and EPC2015 enhancement mode (eGaN®) eld eect
transistors (FETs), as well as the rst eGaN FET specic integrat-
ed circuit driver – the Texas Instruments LM5113. The EPC9101
board is not intended as a reference design, but to showcase
the performance that can be achieved using the eGaN FETs and
eGaN driver together.
Table 1: Performance Summary (TA = 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Bus Input Voltage Range 8 24 V
V
OUT
Switch Node Output Voltage 1.2 V
I
OUT
Switch Node Output Current 20* A
f
SW
Switching frequency 1000 kHz
Peak Eciency 12 V
IN
, = 10 A I
OUT
89.5 %
Full Load Eciency 12 V
IN
, = 20 A I
OUT
86.4 %
Full Load Eciency
24 V
IN
, = 20 A I
OUT
83.3 %
*Maximum limited by thermal considerations and requires 200 LFM forced air cooling
The EPC9101 demonstration board is 3” square and contains a
fully closed loop buck converter.
There are also various probe points to facilitate simple wave-
form measurement and eciency calculation. A complete block
diagram of the circuit is given in Figure 1. For more information
on the EPC2014/5 eGaN FETs or LM5113 driver, please refer to
the datasheet available from EPC at www.epc-co.com and www.
TI.com. These datasheets, as well that of the LT3833 controller
should be read in conjunction with this quick start guide.
Demonstration Board Notication
The EPC9101 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it 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. 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 specications.
V
IN
8 V - 24 V
V
OUT
1.2 V / 20 A
GND GND
5 V
LTC3833
Controller LM5113
Gate
Driver
Dead-Time
Adjust
Single sided layout power stage
Quick Start Procedure
Demonstration board EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 driver.
Refer to Figure 2 for proper connect and measurement setup and follow the procedure below:
1. With power o, connect the input power supply bus between VIN and GND banana jacks as shown.
2. With power o, connect the active (constant current) load as desired between VOUT and GND banana jacks as shown.
3. Turn on the supply voltage to the required value (do not exceed the absolute maximum voltage of 24 V on VIN).
4. Measure the output voltage to make sure the board is fully functional and operating no-load.
5. Turn on active load to the desired load current while staying below the maximum current (20 A)
6. Once operational, adjust the bus voltage and load current within the allowed operating range and observe the output switching behavior,
eciency and other parameters.
7. For shutdown, please follow steps in reverse.
NOTE. When measuring the high frequency content switch node of gate voltage, care must be taken to avoid long ground leads. Measure these by placing the oscilloscope
probe tip on the top pad of D3 and grounding the probe directly across D3 on the bottom pad provided for switch node and using the bottom pad of R20 and the GND pad
below it for gate voltage. See Figure 3 for proper scope probe technique. Measuring the switch node with a high bandwidth ( ≥ 500MHz) probe and high bandwidth scope ( ≥
1GHz) is recommended.
NOTE. The dead-times for both the leading and trailing edges have been set for optimum full load eciency. Adjustment is not recommended, but can be done at own risk by
replacing R21 and R22 with potentiometers P1 and P2. This should be done while monitoring both the input current and switch-node voltage to determine the eect of these
adjustments. Under no circumstance should the input pins to the LM5113 be probed during operation as the added probe capacitance will change the device timing.
CIRCUIT PERFORMANCE
The EPC9101 demonstration circuit was designed to showcase the size and performance that can readily be achieved at 1 MHz operation
using eGaN FETs for supply voltages up to 24V or more. Since a closed loop controller is included on board, the associated losses must also
be lumped into any eciency measurement that is performed. It is possible to supply a separate regulated 5V supply to the EXTVCC pin
to further improve eciency. In that case, the controller and gate drive losses are still included, but the associated conversion loss from
the input supply (LDO loss) is removed.
Figure 4:Typical Switch node voltage for a 24V to 1.2 V/20 A (1 MHz) Buck converter
Figure 1: Block Diagram of EPC9101 Demonstration Board
Figure 2: Proper Connection and Measurement Setup
Figure 3: Proper Measurement of Switch Node or Gate Voltage
Do not use probe ground lead
Place probe tip on padMinimize loop
<24 V
EPC
EFFICIENT POWER CONVERSION
VOUT
+
–
V
VIN
+
–
V
IOUT
A
Active Load
IIN
VIN Supply
+
–
A
<20 V
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Oce: +1.908.475.5702
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Sales, Asia
Mobile: [phone]
[e-mail]
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Oce: +1.972.805.8585
Mobile: [phone]
[e-mail]
Peter Cheng
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Mobile: +886.938.009.706
[e-mail]