EPC9047 Quick Start Guide Datasheet by EPC

Datasheet Feedback/Errors

EFFICIENT POWER CONVERSION l

Development Board

EPC9047

Quick Start Guide

150 V Half-bridge with Gate Drive, Using EPC2033

Revision 3.0

EPCSO47 me view HEP“? @m 2020 “an L5) Fit For evalual' "0| Fcc uppr (u re [2 GNU UOUT EPC9M7 development hoard Bad view

QUICK START GUIDE EPC9048C

DESCRIPTION

The EPC9047 development board is a 150 V maximum device voltage,

12 A maximum output current, half bridge with onboard gate drives,

featuring the EPC2033 GaN field effect transistor (FET). The purpose of this

development board is to simplify the evaluation process of the EPC2033

by including all the critical components on a single board that can be

easily connected into the majority of existing converter topologies.

The EPC9047 development board measures 2” x 2” and contains two

EPC2033 GaN FETs in a half bridge configuration with the On-Semi

NCP51820 gate driver. The board also contains all critical components

and the layout supports 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 EPC2033 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.

Table 1: Performance Summary (TA = 25°C) EPC9047

Symbol Parameter Conditions Min Nominal Max Units

VDD

Gate Drive Input

Supply Range 10 12 V

VIN

Bus Input Voltage

Range(1) 120

IOUT

Switch Node Output

Current (2) 15 A

VPWM

PWM Logic Input

Voltage Threshold (3)

Input ‘High’ 3.5 5.5 V

Input ‘Low’ 0 1.5

Minimum ‘High’ State

Input Pulse Width

VPWM rise and

fall time < 10ns 50

Minimum ‘Low’ State

Input Pulse Width (4)

VPWM rise and

fall time < 10ns 200

(1) Maximum input voltage depends on inductive loading, maximum switch node ringing

must be kept under 150 V for EPC2033.

(2) Maximum current depends on die temperature – actual maximum current is affected by

switching frequency, bus voltage and thermal cooling.

(3) When using the on board logic buffers, refer to the NCP51820 datasheet when bypass-

ing the logic buffers.

(4) Limited by time needed to ‘refresh’ high side bootstrap supply voltage.

EPC9047 development board Back view

Front view

Figure 1: Block diagram of EPC9047 development board

VDD

VIN

CBypass

PWM

GND

Cout

Gate drive

regulator

Gate driver

DC Output

PGND

Logic and

dead-time

adjust

Level

shift

LDO

Hin

Lin

LDO

Level

shift

LDO

DBTST

LDO

Logic

QUICK START GUIDE EPC9048C

110 VDCmax

VDD supply

(Note polarity)

Output Capacitor Output Inductor

PWM1

(default)

DC load

Switch-node

output

Output Capacitor Output Inductor

12 VDC

110 VDCmax

VDD supply

(Note polarity)

VMain

supply

(Note

polarity)

VMain

supply

(Note

polarity)

PWM1

Upper

FET

PWM2

Lower

FET DC load

12 VDC

EPC9047

Figure 2: Input mode selection on J630

(a) (c)(b)

QUICK START PROCEDURE

The EPC9047 development board is easy to set up as a buck or boost

converter to evaluate the performance of two EPC2033 eGaN FETs.

In addition to the deadtime features of the NCP51820 gate driver, this board

includes a dead-time generating circuit that adds a delay from when the

gate signal of one FET is commanded to turn off, to when the gate signal

of the other FET is commanded to turn on. In the default configuration, the

NCP51820 gate driver is set mode D (no-dead time, no-cross conduction

protection - refer to datasheet for NCP51820) and the on-board dead time

circuit provides the necessary dead time and ensures that both the high and

low side FETS will not be turned on at the same time thus preventing a shoot

through condition.

Single/dual PWM signal input settings

PWM1 and PWM2. Both input ports are used as inputs in dual-input mode

where PWM1 connects to the upper FET and PWM2 connects to the lower

FET. The PWM1 input port is used as the input in single-input mode where

the circuit will generate the required complementary PWM with preset dead

time for the FETs as shown in figure 2(a). This is the default configuration.

To select dual input mode, the zero-ohm resistor in position R5 needs to be

removed and installed in position R6 as shown in figure 2(b).

Note: In dual mode there is no shoot-through protection as both gate

signals can be set high at the same time. 2. The NCP51820 has an on-

chip deadtime generator with several modes of operation. The EPC9047

disables the on-chip deadtime to maximize end user flexibility, but it

makes the on-chip deadtime modes accessible through P1, R11, and R12.

Refer to the NCP51820 datasheet for details on setting the dead time using

P1, R11 and R12.

PWM1

Enable

Single input Single input Dual-mode dead time settings

PWM2

Top-side Bottom-side

Buck converter configuration

To operate the board as a buck converter, either a single or dual PWM input

can be chosen. Figure 3(a) shows the connection setup for single PWM

input mode and figure 3(b) for the dual PWM input mode.

Note: It is important to provide the correct PWM signals that includes

dead-time and polarity when operating in dual PWM input mode and not

making use of the gate driver dead time function.

Once the input source and dead-time settings have be chosen and set,

then the board can be operated.

1. With power off, connect the input power supply bus to VIN and ground/

return to GND.

2. With power off, connect the switch node (SW) of the half bridge to your

circuit as required (half bridge configuration). Or use the provided pads

for inductor (L1) and output capacitors (Cout), as shown in figure 3.

3. With power off, connect the gate drive supply to VDD (J1, Pin-1) and

ground return to GND (J1, Pin-2 indicated on the bottom side of the

board).

4. With power off, connect the input PWM control signal to PWM1 and/or

PWM2 according to the input mode setting chosen and ground return

to any of GND J10 pins indicated on the bottom side of the board.

5. Turn on the gate drive supply – make sure the supply is at least 10 V but

does not exceed 12 V.

6. Turn on the controller / PWM input source.

7. Making sure the initial input supply voltage is 0 V, turn on the power

and slowly increase the voltage to the required value (do not exceed the

absolute maximum voltage). 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.

Figure 3: (a) Single-PWM input buck converter (b) Dual-PWM input buck converter

configurations showing the supply, output capacitor, inductor, PWM, and load

connections.

(b)

(a)

QUICK START GUIDE EPC9048C

Boost Converter configuration

Warning: Never operate the boost converter mode without a

load as the output voltage can increase beyond the maximum

ratings.

To operate the board as a boost converter, either a single or dual

PWM input can be chosen. Figure 4(a) shows the connection setup

for single PWM input mode and figure 4(b) for the dual PWM input

mode.

Notes:

1. It is important to provide the correct PWM signals that

includes dead-time and polarity when operating in dual PWM

input mode and not making use of the gate driver dead time

function.

2. Boost mode PWM converters are theoretically capable of

generating arbitrarily high voltages, limited only by losses

and component ratings. Review the operation of boost mode

converters and make sure to avoid combinations of duty cycle

and load that will generate higher voltages than the voltage

rating of the development board and attached components.

Once the input source, dead-time settings and bypass configurations

have be chosen and set then the boards can be operated.

1. The inductor (L1) and input capacitors (labeled as Cout) can

either be soldered onto the board, as shown in figure 4, or

provided off board.

2. With power off, connect the input power supply bus to VOUT

and ground / return to GND, or externally across the capacitor

if the inductor L1 and Cout are provided externally. Connect the

output voltage (labeled as VIN) to your circuit as required, e.g.,

resistive load.

3. With power off, connect the gate drive supply to VDD (J1, Pin-1)

and ground return to GND (J1, Pin-2 indicated on the bottom

side of the board).

4. With power off, connect the input PWM control signal to PWM1

and/or PWM2 according to the input mode setting chosen and

ground return to any of GND J10 pins indicated on the bottom

side of the board.

5. Turn on the gate drive supply – make sure the supply is at least

10 V but does not exceed 12 V.

6. Turn on the controller / PWM input source.

7. Making sure the output is not open circuit, and the input

supply voltage is initially 0 V, turn on the power and slowly

increase the voltage to the required value (do not exceed the

absolute maximum voltage). 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. Observe device

temperature for operational limits.

9. For shutdown, please follow steps in reverse.

VDD supply

(Note polarity)

PWM1

DC load

VMain supply

(Note polarity)

DC load

VDD supply

(Note polarity)

PWM1

Upper

FET

PWM2

Lower

FET

VMain supply

(Note polarity)

12 VDCmax

12 VDCmax Output Capacitor Output Inductor

Input Capacitor Boost Inductor

160 VDCmax

EPC9047

(a)

(b)

Figure 4: (a) Single-PWM input boost converter (b) Dual-PWM input

boost converter configurations showing the supply, inductor, output

capacitor, PWM, and load connections.

W J/ W\\ A 1" \ ' \ J 7 , ‘77 , 5. ﬂ ’ \k 4 / \ ’ '\ M/ bx»?

QUICK START GUIDE EPC9048C

Ground oscilloscope probe

Switch-node oscilloscope

probe (HIGH VOLTAGE!)

Switch-node MMCX

(HIGH VOLTAGE!)

HIGH VOLTAGE

(a)

(b)

Figure 5 Measurement points (a) front side, (b) Back side

Figure 6: Typical switch-node waveform when operated as a buck converter

MEASUREMENT CONSIDERATIONS

Measurement connections are shown in figure 5.

Figure 6 shows an actual switch-node voltage

measurement when operating the board as a buck

converter.

When measuring the switch node voltage containing

high-frequency content, care must be taken to

provide an accurate high-speed measurement. An

optional two pin header (J5) and an MMCX connector

(J6) are provided for switch-node measurement.

A differential probe is recommended for measuring

the high-side bootstrap voltage. IsoVu probes from

Tektronix has mating MMCX connector.

For regular passive voltage probes (e.g. TPP1000)

measuring switch node using MMCX connector,

probe adaptor is available. PN: 206-0663-xx.

NOTE. For information about measurement techniques,

the EPC website offers: “AN023 Accurately Measuring

High Speed GaN Transistors” and the How to GaN

educational video series, including: HTG09- Measurement

Lower FET

Gate Voltage

Ground oscilloscope probe

Switch-node

oscilloscope probe

Upper FET Gate

Voltage MMCX

(HIGH VOLTAGE!)

Voltage measurement:

Input voltage for Buck,

Output voltage for Boost

(HIGH VOLTAGE!)

Voltage measurement:

Input voltage for Boost,

Output voltage for Buck

(HIGH VOLTAGE!)

HIGH VOLTAGE

EPC9047

THERMAL CONSIDERATIONS

The EPC9047 is intended for bench evaluation with

low ambient temperature and convection cooling.

The addition of a heat-spreader or heatsink 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 EPC9047 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.

= 120 V, V

OUT

= 12 V, I

OUT

= 15 A, f

= 100 kHz, L = 30 μH

20 V/div 5 ns/div

tf = 5 ns

90%–10%

fall time

tr = 4 ns

10%–90%

rise time

QUICK START GUIDE EPC9048C

QUICK START GUIDE EPC9047

Table 2: Bill of Materials

Item Qty Reference Part Description Manufacturer Part Number

1 9 C1, C2, C3, C4, C5, C6, C7, C8, C9 0.33 μF 250 V TDK

CGA6M3X7T2E334K200AA

2 4 C10, C11, C12, C13 0.1 μF 250 V TDK

C2012X7T2E104K125AA

3 4 C14, C16, C23, C24 1 μF 25 V TDK

C1608X7R1E105K080AB

4 1 C15 4.7 μF 25 V TDK

C1608X5R1E475K080AC

5 2 C17, C25 0.1 μF 25 V TDK

C1608X7R1E104K080AA

6 2 C18, C26 0.1 μF 25 V TDK

C1005X7R1E104K050BB

7 2 C19, C20 100 pF 50 V Yageo

CC0402KRX7R9BB101

8 1 C21 0.47 μF 25 V TDK

C2005X5R1E474K050BB

9 1 C22 15 pF 50 V TDK

CGA2B2C0G1H150J050BA

10 2Q1, Q2 150 V 7 mΩ GaN FET EPC

EPC2033

11 2R5, R15 300 Ω Yageo

RC0603FR-07300RL

12 2R8, R9 10 k Yageo

RC0603JR-0710KL

13 4 R3, R4, R7, R10 4.7 Ω Stackpole

RMCF0402FT4R70

14 R12 10 k Yageo

RC0603JR-0710KL

15 1R13 2 Ω Stackpole

RMCF0402JT2R00

16 1R14 1 Ω ROHM

MCR01MRT1JR0

17 1R20 10 k Panasonic

ERJ-2RKF1002X

18 5 TP1, TP2, TP3, TP5, TP6 SMD probe loop Keystone 5015

5015

19 1D1 600 V 200 mA Rohm

RFU02VSM6STR

20 2D5, D15 40 V 30 mA Diodes Inc.

SDM03U40-7

21 1U1 600 V HB GaN FET gate driver On Semiconductor

NCP51820AMNTWG

22 1 U2 2 input AND, TinyLogic, 1.65 V-5.5 V, +-32 mA Fairchild

NC7SZ08L6X

23 1U3 2 input NAND, TinyLogic, 1.65 V-5.5 V, +-32 mA Fairchild

NC7SZ00L6X

24 1

2x1 0.1 male vertical through hole Wurth

6130 0211121

25 1J7 2x12 0.1 male vertical through hole Tyco

4-103185-0-04

26 1J10 4x1 0.1 male vertical through hole TE Connectivity

4-103185-0-04

Optional Components

Item Qty Reference Part Description Manufacturer Part Number

1 2 R1, R2 0 Ω Stackpole RMC0402ZT0R00

2 1 R6 0 Ω Stackpole RMCF0603ZT0R00

3 1 Cout1 Cout_generic TBD TBD

4 1 EN1 0.1 male vertical 1 position 0.1 pitch Wurth 613 0 0111121

5 3 J3, J4, J6 MMCX Jack Vertical SMT 50 Ω Molex 734152063

6 1 J12 7.62 mm Euro Term Wurth 691216410002

7 1 L1 GenericOutputInductor TBD TBD

8 1 P1 250 k Bourns PV37W254C01B00

9 1 R11 R0603-TBD TBD TBD

QUICK START GUIDE EPC9048C

Figure 7: EPC9047 main schematic

9 VDC - 12 VDC

PWM2

PWM1

PWM2

V SW

vGS1 probe adapter vGS2 probe adapter vSW probe holes

V OUT

V SW

SW Output

Main Supply Input

GN D

Sync Buck Output

V G1

MMCX MMCX

V SW

V G1

PWM1

V OUT

V SW

vSW probe adapter

MMCX

V G2

V I N

100 pF, 50 V

C19

100 pF, 50 V

C20

5 V

PWM1

V G2

V DD

i Net C lass

ClassName: HighVoltage

i Net C lass

ClassName: HighVoltage

Net C lass

ClassName: HighVoltageGate

Net C lass

ClassName: HighVoltageGate

EPC 2033

HI N

L I N

V DD 14

SGND

VBST 15

NCP51820AMNTWG

V DD

2 Ω

R13

1 μF, 25 V

C16

1 μF, 25 V

C23

1 μF, 25 V

C24

0.1 μF, 25 V

C17

0.1 μF, 25 V

C25

10 k

R20

10 k

R12

R11

250 k

EMPTY

1 Ω

R14

NC7SZ00L 6X

NC7SZ08L 6X

5 V

300 Ω

0 Ω

E MPT Y

15 pF, 50 V

C22

EN1

EMPTY SIP1

0.1 μF, 25 V

C18

0.1 μF, 25 V

C26

0.33 μF, 250 V

0.1 μF, 250 V

C10

0.1 μF, 250 V

C11

0.1 μF, 250 V

C12

0.1 μF, 250 V

C13

4.7 Ω

R10

4.7 μF, 25 V

C15

1 μF, 25 V

C14

10 k

J10

CON4

E MPT Y

TB D

Cout1

E MPT Y

J7A

J7B

J7C

600 V, 200 mA

0.47 μF, 25 V

C21

E MPT Y

0 Ω

E MPT Y

0 ΩR1

EMPTY

T B DL 1

E MPT Y

7.62 mm Euro Term

J12

E MPT Y

FD1

PCB Fiducial

FD2

PCB Fiducial

FD3

PCB Fiducial

PCB 1

PCB

For evaluation only;

not FCC approved for resale

TP2

Keystone 5015

TP3

Keystone 5015

TP5

Keystone 5015

TP6

Keystone 5015

V I N

V OUT

TP1

Keystone 5015

40 V 30 mA

D15

SDM03U40

300 Ω 1%

R15

Mode D (default)

40 V 30 mA

SDM03U40

ATTENTION

ELECTROSTATIC

SENSITIVE DEVICE

ATTENTION

ELECTROSTATIC

SENSITIVE DEVICE

HIGH VOLTAGE

ATTENTION

HOT SURFACE

EFFIEIENT POWER (ONVERSION l

Demonstration Board Notification

The EPC9047 board is intended for product evaluation purposes only. It is not intended for commercial use nor is it FCC approved for resale. 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

For More Information:

Please contact info@epc-co.com

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

EPC9047 Quick Start Guide Datasheet by EPC

INFORMATION

HELP

CONTACT US

FOLLOW US