demonstration system epc9153 quick start guide - epc-co.com

Demonstration System EPC9153Quick Start Guide44–60 V Input, 12-20 V, 12.5 A Outputup to 250 W High Efficiency, Thin Power Module

Revision 1.0

http://epc-co.com/epc

QUICK START GUIDE Demonstration System EPC9153

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2021 | | 2

DESCRIPTION The EPC9153 demonstration board is a synchronous buck converter with 60 V maximum input voltage, 12.5 A maximum output current, and 12-20 V (default set to 20 V) regulated output voltage. The simplified schematic diagram is shown in Figure 1. It features the 100 V EPC2218 and EPC2038 GaN FETs. Other features include:

• High efficiency: 98.2% @ 20 V/12.5 A output• Low profile: 6.5 mm component height• Temperature rise: < 40 °C @ 20 V with 12.5 A output• Constant switching frequency: 400 kHz• Re-programmable• 150% over current for 10 ms• 200% over current for 1 ms • Fault protection: o Input undervoltage o Input overvoltage o Output over voltage

o Short circuit o Over current

REGULATORY INFORMATION This converter is for evaluation purposes only. It is not a full-featured converter and cannot be used in final products. No EMI test was conducted. It is not FCC approved.

FIRMWARE UPDATES Every effort has been made to ensure all control features function as specified. It may be necessary to provide updates to the firmware. Please check the EPC and Microchip websites for the latest firmware updates.

VIN

Q1

Q2

CIN

LOUT

5 VPWMH

PWML

GND

COUT

VOUT

PWMH

PWML

5 V for gate driver

3.3 VVIN_sense

VOUT_senseIOUT_sense

3.3 V for digitalcontroller andcurrent ampli�er

PGND

Gate driver

Leve

l shif

t

HV PSU

Digitalcontroller

Table 1: Absolute Maximum RatingsSymbol Parameter Conditions Min Max UnitsVIN Input voltage 80 V

Table 2: Electrical Characteristics (TA = 25°C unless specified otherwise)Symbol Parameter Conditions Min Typ Max Units

VIN Input Voltage 44 56 60

V

VIN,on Input UVLO Turn on Voltage 42 44VIN,off Input UVLO Turn off Voltage 40 42VIN_OVP Input Over Voltage Protection 59.5 60VOUT Output Voltage 20tOUT,rise Output Voltage Rise Time VIN = 56 V, IOUT = 0 A 6 msΔVOUT Output Voltage Ripple IOUT = 12.5 A 40 mV

VOUT_OVPOutput Over Voltage

Protection 21.7 25.5

V

VOUT_150%Output Voltage at 150%

Transient Overcurrent IOUT = 18.75 A, over current period = 10 ms 18.5

VOUT_200%Output Voltage at 200%

Transient Overcurrent IOUT = 25 A, over current period = 1 ms 18.5

VOUT_OSOutput Voltage Overshoot

at Load Step Load step = 11.25 A to 0 A, VIN = 56 V 21.5

VOUT_USOutput Voltage Undershoot

at Load Step Load step = 0 A to 11.25 A, VIN = 56 V 18.5

IOUT Output Current 0 12.5A

IOUT,limit Overcurrent Limit Threshold 14 17fs Switching Frequency 400 kHz

Trise Temperature RiseVIN = 56 V, IOUT = 12.5 A, heat-spreader

installed, no forced air, measured at heat-spreader

33 38 °C

Figure 1: Simplified schematic diagramof the EPC9153 synchronous buck converter

EPC9153 board - Variant 2, Delta/Cyntec inductor

EPC9153 board - Variant 1, Wurth inductor

https://epc-co.com/epc/Portals/0/epc/documents/datasheets/EPC2218_datasheet.pdf

https://epc-co.com/epc/Portals/0/epc/documents/datasheets/EPC2038_datasheet.pdf



ELECTRICAL PERFORMANCETypical efficiency and power loss

Typical output voltage ripple Typical transient response

999897969594939291908988

Tota

l Sys

tem

E�

cien

cy (%

)

Output Current (A)1 2 3 4 5 6 7 8 9 10 11 12 13

Output Current (A)10 2 3 4 5 6 7 8 9 10 11 12 13

5

4

3

2

1

0

Tota

l Pow

er L

oss (

W)

VIN = 48 V

VIN = 56 V

VIN = 48 V

VIN = 56 V

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l Sys

tem

E�

cien

cy (%

)

Output Current (A)1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13

Output Current (A)

5

4

3

2

1

0

Tota

l Sys

tem

E�

cien

cy (%

)VOUT = 20 V

VOUT = 12 V

VOUT = 20 V

VOUT = 12 V

Figure 2: 20 V output, different input voltages

Figure 3: 12.5 A output, different ouput voltages

Figure 4: VIN = 56 V, VOUT = 20 V, IOUT = 12.5 A Figure 5: VIN = 56 V, VOUT = 20 V, 10% (1.25 A) to 100% (12.5 A)

2 μs/div50 mV/div

VOUT

VOUT

IOUT

5 ms/div1 V/div5 A/div

Startup Typical switching waveform

Figure 6: Start-up at VIN = 56 V, VOUT = 20 V, IOUT = 12.5 A Figure 7: Measured switch-node voltage at VIN = 56 V, VOUT = 20 V, IOUT = 12.5 A

VOUT

5 ms/div5 V/div

VSW

200 ns/div10 V/div



ELECTRICAL PERFORMANCE (continued)

Figure 8: Output voltage and current waveforms at overcurrent protection

20 ms/div

Latch o�

VOUT, 5 A/div

VOUT, 4 V/div

Overcurrentevent 39 ms

Overcurrent protection

applied control laws as well as making modifications to the feedback loop and control signals during runtime, optimizing control schemes and adapting control accuracy and performance to most recent operating conditions. As a result, digital control allows users to tailor the behavior of the converter to application specific requirements without the need for modifying hardware.

Programming

The Microchip dsPIC33CK controller can be re-programmed using the in-circuit serial programming port (ICSP) available on the 5-pin header. This interface supports the Microchip in-circuit programmers/debuggers, such as MPLAB® ICD4, MPLAB® REAL ICE or MPLAB® PICkit4 and previous derivatives.

Control loop

The EPC9153 synchronous buck converter module adopts constant frequency, average current mode control implemented by a Microchip dsPIC33CK32MP102 Digital Signal Controller (DSC). The error between the output voltage feedback signal and the voltage reference is fed to an error amplifier and generate a current reference signal. Another error amplifier compares the sensed inductor average current with this current reference, and generates a command signal that drives the pulse width modulator. When the output current increases, the decrease in the voltage feedback signal causes the command signal to increase until the average inductor current matches the new output current.

Soft start-up

The start-up of the EPC9153 output voltage is programmed to be a soft start-up: Once the input voltage passes the input UVLO threshold, the output voltage rises monotonously from 0 to its final value without overshoot in 6 ms. The rise time can be changed through a re-program of the controller.

OPERATING CONSIDERATIONS

ControllerThe EPC9153 synchronous buck power module features a Microchip Technology dsPIC33CK32MP102 Digital Signal Controller DSC. This 100 MHz single core device is equipped with dedicated peripheral modules for Switched-Mode Power Supply (SMPS) applications, such as a feature-rich 4-channel (8x output), 250 ps resolution pulse width modulation (PWM) logic, three 3.5 Msps Analog-To-Digital Converters (ADC), three 15 ns propagation delay analog comparators with integrated Digital-To-Analog Converters (DAC) supporting ramp signal generation, three operational amplifiers as well as Digital Signal Processing (DSP) core with tightly coupled data paths for high performance real-time control applications. The device used is the smallest derivative of the dsPIC33CK single core and dsPIC33CH dual core DSC families. The device used in this design comes in a 28 pin 6x6 mm UQFN package, specified for ambient temperatures from -40 to +125° C. Other packages including a 28 pin UQFN package with only 4x4 mm are available.

The dsPIC33CK device is used to drive and control the converter in a fully digital fashion where the feedback loops are implemented and executed in software. Migrating control loop execution from analog circuits to embedded software enhances the flexibility in terms of

Figure 9: Programming connection



FAULT PROTECTIONSeveral basic fault handlers have been implemented. Whenever a fault condition is tripped, the PWM signals are switched off and the converter shuts down. And it will remain in this shut-down state. To restart, the input voltage needs to be removed, and then reapplied. Once the output voltage drops below 2.5 V, the converter will attempt to restart.

Over-Current Protection

The maximum rated continuous output current is 12.5 A. It can also handle 150% over current (12.5 A to 18.75 A) for 10 ms, and 200% over current (12.5 A to 25 A) for 1 ms. When the total duration of the over current event exceeds the time limit, the over-current fault will trip.

In addition, if the output current is higher than 15 A for longer than 30 ms, the over-current fault will trip as well.

Short-Circuit Protection

The short-circuit fault will trip when the output is shorted to ground. If the short is present before powering up, the converter will not start.

Output Over-Voltage Protection

If the output voltage is 3.5 V above the set point, the PWM signals are switched off.

THERMAL MANAGEMENTThermal management is very important to ensure proper and reliable operation. The EPC9153 is intended for bench evaluation at normal ambient temperature. The addition of a heat-spreader or heatsink and forced air cooling can significantly increase the current rating of the power devices, but care must be taken to not exceed the absolute maximum die temperature of 150°C.

The EPC9153 board is designed with three mechanical spacers that accept M2 x 0.4 mm thread screws and can be used to easily attach a heat-spreader/heatsink as shown in Figure 10. It only requires a thermal interface material (TIM), a custom shape heat-spreader/heatsink, a thin insulation layer for the components with exposed conductors such as capacitors and resistors and screws. The EPC9153 with the heat-spreader installed is shown in Figure 11.

M2 screws (x3)

Heat-spreader

Insulation layer

TIM

SMD spacer (x3)

eGaN FET (x2)

Figure 10: Illustration of theheat-spreader assembly

Figure 11: (left) EPC9153 with heat-spreader assembled (right) Dimensions of the heat-spreader

11.50

5.80

9.80

B

7.10

9.50

6.40

16.3

0

2.50

2.50

5.40

8.50

B

9.30 A

A

B

2.00

10.80

5.00 7.00

Unit: mm

3.80

90°

A

20.1

0

42.6

0

3.30



THERMAL MANAGEMENT (continued)The choice of TIM needs to consider the following characteristics:

• Mechanical compliance – The TIM becomes compressed during heatsink attached and exerts a force on the FETs. A maximum compression of 2:1 is recommended for maximum thermal performance and to constrain the mechanical force that maximizes thermal mechanical reliability.

• Electrical insulation – The backside of the eGaN FETs are substrate that are connected to source and the upper FET will thus be connected to the switch-node. The TIM must therefore provide insulation to prevent short-circuiting the upper FET to the ground.

• Thermal performance – The choice of thermal material will affect the thermal performance. Higher thermal conductivity materials will result in higher thermal performance.

EPC recommends t-Global P/N: TG-X 500 µm for the thermal interface material.

As shown in Figure 12, the EPC9153 board with the heat-spreader installed measures a temperature rise of less than 40 °C at full load operation without any forced air.

Figure 12: Thermal image of the EPC9153 operating at 56 VIN , 20 V and 12.5 A output, thermal steady state

Figure 13: Input and output connection Figure 14: Measurement connection

Thermal deratingWithout sufficient thermal management, the output current capability is reduced. If the user decides to uninstall the heatsink, the module temperature should be monitored to ensure the maximum temperature does not exceed the rating.

QUICK START OPERATING PROCEDUREThe EPC9153 synchronous buck converter module is easy to set up for evaluation. Refer to Figures 13-14 and follow the procedure below for proper connection and measurement setup:

1. With power off, connect the input power supply to VIN+ and VIN- as shown in Figure 13.

2. With power off, connect the load to VOUT+ and VOUT- as in Figure 12.

3. Making sure the initial input supply voltage is 0 V, turn on the power and increase the voltage to the required value (do not exceed the absolute maximum voltage 60 V). Output voltage regulation begins at 44 V input voltage.

4. Once operational, adjust the load within the operating range and observe the switching behavior, efficiency, transient response and other parameters as in Figure 14.

5. For shutdown, please follow the above steps in reverse.

DC load

Input voltagemeasurement(HIGH VOLTAGE!)

GND probing

Switch-node probing

Output voltagemeasurement

60 VINmaxVIN supply (Note polarity)

+

HIGH VOLTAGE

V

V

+

+

_

_



MECHNICAL SPECIFICATIONS

76.4

mm

74 mm

6.5 m

m

23.9

mm

Figure 15: EPC9153 mechanical dimensions



Table 3: Bill of Materials Item Qty Reference Part Description Manufacturer Part #

1 4 C14, C17, C18, C20 15 µF Tantalum Polymer Capacitor 75 V Kemet T521X156M075ATE035

2 3 C37, C57, C58 100 µF Tantalum Polymer Capacitor 25 V Kemet T521X107M025ATE03

3 6 C34, C35, C46, C47, C67, C78 10 µF ±10% 75 V Ceramic Capacitor X7R 1210 TDK C3225X7R1N106K250AC

4 6 C7, C13, C43, C44, C45, C69 1 µF ±10% 100 V Ceramic Capacitor X7R 0805 AVX 08051C105K4Z2A

5 16C27, C28, C29,C30, C31, C32, C33,C36, C59, C60, C61,C62, C63, C64, C65, C66

4.7 µF ±10% 50 V Ceramic Capacitor X7R 0805 TDK C2012X7R1H475K125AC

6 1 C4 1 µF ±10% 35 V Ceramic Capacitor X7R 0603 TDK C1608X7R1V105K080AC

7 1 C9 1 µF ±10% 25 V Ceramic Capacitor X7R 0603 Wurth 885012206076

8 1 C10 10 µF ±20% 6.3 V Ceramic Capacitor X7R 0603 Samsung CL10B106MQ8NRNC

9 5 C39, C40, C41,C42, C73 0.1 µF ±10% 100 V Ceramic Capacitor X7R 0603 Murata GRM188R72A104KA35D

10 1 C24 22 µF ±20% 16 V Ceramic Capacitor X5R 0603 Samsung CL10A226MO7JZNC

11 1 C76 2.2 µF ±20% 16 V Ceramic Capacitor X7R 0603 Taiyo Yuden EMK107BB7225MA-T

12 1 C1 680 pF ±5% 25 V Ceramic Capacitor C0G, NP0 0402 Murata GRM1555C1E681JA01D

13 1 C2 51 pF ±5% 50 V Ceramic Capacitor C0G, NP0 0402 Samsung CL05C510JB5NNNC

14 1 C3 10 nF ±20% 100 V Ceramic Capacitor X7S 0402 TDK C1005X7S2A103M050BB

15 1 C5 22 nF ±10% 25 V Ceramic Capacitor X7R 0402 TDK C1005X7R1E223K050BB

16 2 C6, C82 10 nF ±10% 16 V Ceramic Capacitor X7R 0402 Kemet C0402C103K4RECAUTO

17 6 C8, C15, C16, C19, C21, C68 0.1 µF ±10% 25 V Ceramic Capacitor X7R 0402 Yageo CC0402KRX7R8BB104

18 2 C11, C22 0.47 µF ±10% 10 V Ceramic Capacitor X7R 0402 Taiyo Yuden LMK105B7474KV-F

19 1 C12 10 µF ±20% 10 V Ceramic Capacitor X5R 0402 Samsung CL05A106MP5NUNC

20 1 C23 2.2 µF ±20% 25 V Ceramic Capacitor X5R 0402 TDK C1005X5R1E225M050BC

21 1 C25 220 pF ±10% 50 V Ceramic Capacitor X7R 0402 Kemet C0402C221K5RACTU

22 1 C54 33 pF ±5% 50 V Ceramic Capacitor C0G, NP0 0402 Samsung CL05C330JB5NNNC

23 1 C77 10 nF ±10% 50 V Ceramic Capacitor X7R 0402 Kemet C0402C103K5REC7411

24 1 D1 Zener Diode 5.1 V, 250 mW ±6% Diodes BZT52C5V1LP-7

25 2 D2, D3 Diode Schottky 40 V, 200 mA Diodes BAS40LP

26 1 J1 Connector Header, Right Angle 5 position 0.1" Wurth 61300511021

27 4 J2, J3, J4, J5 Banana Jack Connector Keystone 575-4

28 1 L1 68 µH Inductor 540 mA, 840 mΩ Wurth 74404042680

29 1 L2 2.2 µH Inductor 20% 2.5 A, 100 mΩ Coilcraft LPS4012

30 1 L3 4.8 µH Inductor 15 A, 1 mΩ Cyntec Wurth

4R8 2034F7443764965048

31 2 Q1, Q2 100 V GaN FET, 3.2 mΩ EPC EPC2218

32 1 Q3 100 V GaN FET, 2.8Ω EPC EPC2038

33 1 R1 31.6 kΩ ±0.1% 0.1 W Chip Resistor 0603 Panasonic ERA-3AEB3162V

34 1 R2 2.7 kΩ ±0.1% 0.1 W Chip Resistor 0603 Panasonic ERA-3AEB272V

35 1 R3 180 kΩ ±0.1% 0.1 W Chip Resistor 0603 Panasonic ERA-3AEB184V

36 1 R6 9.1 kΩ ±0.1% 0.2 W Chip Resistor 0603 Panasonic ERJ-PB3B9101V

37 1 R9 0 Ω Jumper 0.1 W Chip Resistor 0603 Panasonic ERJ-3GEY0R00V

38 1 R11 0 Ω Jumper 0.063 W Chip Resistor 0402 Yageo RC0402JR-070RL

39 3 R4, 48, R10 1 Ω ±1% 0.063 W Chip Resistor 0402 Yageo RC0402FR-071RL

40 1 R5 27 kΩ ±5% 0.1 W Chip Resistor 0402 Panasonic ERJ-2GEJ273X

41 1 R7 4.7 Ω ±1% 0.063 W Chip Resistor 0402 Stackpole RMCF0402FT4R70

42 2 R12, R23 10 kΩ ±5% 0.063 W Chip Resistor 0402 Yageo RC0402JR-0710KL

43 1 R13 1 kΩ ±5% 0.063 W Chip Resistor 0402 Yageo RC0402JR-071KL

44 1 R16 100 kΩ ±1% 0.063 W Chip Resistor 0402 Yageo RT0402FRE07100KL

45 2 R17, R54 20 Ω ±0.5% 0.063 W Chip Resistor 0402 Yageo RT0402DRE0720RL

46 2 R18, R26 31.6 kΩ ±1% 0.063 W Chip Resistor 0402 Yageo RC0402FR-0731K6L



Table 4: Bill of Materials (continued) Item Qty Reference Part Description Manufacturer Part #

47 1 R24 90.9 kΩ ±0.1% 0.063 W Chip Resistor 0402 Panasonic ERA-2AEB9092X

48 1 R28 180 Ω @ 100 MHz Ferrite Bead 0603 Murata BLM18PG181SN1D

49 2 R44, R45 50 Ω @ 100 MHz Ferrite Bead 1206 Murata BLM31SN500SH1L

50 1 R46 1 mΩ ±5% 1 W Chip Resistor Wide 0805 Susumu KRL2012E-M-R001-J-T5

51 2 R47, R48 0 Ω Jumper 0.1 W Chip Resistor 0402 Panasonic ERJ-2GE0R00X

52 3 S2, S3, S5 Round Standoff Threaded M2x0.4 Steel 0.039" Wurth 9774010243R

53 4 SO1, SO2, SO3, SO4 Board Support Snap Fit / Snap Fit Nylon 0.625" Keystone 8834

54 4 TP1, TP2, TP3, TP4 PC Test Point Keystone 5015

55 1 U1 Current Sense Amplifier SOT-23-6 Microchip MCP6C02T-050E/CHY

56 1 U2 dsPIC dsPIC™ 33CK Microcontroller IC 16-Bit 100 MHz 32 KB Microchip DSPIC33CK32MP102-I/2N

57 1 U4 Buck Switching Regulator IC Adjustable Output 150 mA 10-VFDFN TI LM5165DRCR

58 1 U5 Linear Voltage Regulator IC 500mA 6-WSON TI TLV75533PDRVR

59 1 U6 UPI, UP1966A, USMD, BGA UPI uP1966AFBB

60 1 U7 Buck, Buck-Boost Switching Regulator IC 500 mA 10-WFDFN TI TPS62175DQCR

61 3 SC1, SC2, SC3 M2 x 0.4 mm Threaded Screw, 5 mm McMaster-Carr 91698A201

62 1 TIM1 Thermal pad t-Global TG-X x y 0.5

63 1 TIM2 Thermal pad Laird A14692-30

64 1 HS1 Custom heat-spreader See Figure 11

65 2 R25, R27 0 Ω Jumper 0.063 W Chip Resistor 0402 Yageo RC0402JR-070RL

66 1 C26 51 pF ±5% 50 V Ceramic Capacitor NP0 0402 Samsung CL05C510JB5NNNC

67 1 C56 33 pF ±5% 50 V Ceramic Capacitor NP0 0402 Samsung CL05C330JB5NNNC

QUICK START GUIDEDem

onstration System EPC9153

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM

| ©2021 |

| 10

Figure 16: EPC9153 Controller schematic

31.6 KR1

2.7 KR2

680 pF, 25 VC1

180 KR3

9.1KR6

10 nF, 25 VC3

Voltage sense

Pickit/PS-ID program header

Programming and Communications

0.1uF, 25VC190.1 μF, 25 V

C15

Decoupling Caps for the PIC

Current sense

1

26

4

5

3GM1

GM2

RM 3 V OUT

V REF

V IM

V IP

V SS

V DDU1

MCP6C02T -050E/CHY

51 pF, 50 VC2

68uH 540 mA

L1

10 μF, 6.3 VC10

1 μF, 100 VC7

10

Reg

Osc

3

HYS

Logic

SS

2

5

Gnd

Vin

Ilim

1

8

UVLO

RT

EN

SW

4

7

9

FB6 Pgood

1.223V

U4LM5165DRCR

1 μF, 25 VC9

31.6 KR18

100 KR16

10 μF, 10 VC12

0.47 μF, 10 V

C11

Housekeeping power supply

Vin to 5 V 5 V to 3.3 V

IN

EN GND

OUT

NCNC

U5

TL V75533PDR VR

0.1 μF, 25 VC68

2.2 μF, 16 VC76

10 nF, 50 VC77

ISNS+

ISENSEMCLR

3V3

PGD

0 Ω

R9

1KR13

VOUT

VOUT_SNS

VIN_SNS

VIN

ISENSE 3V3 3V3

VIN

PGC

0 Ω

R25DNP

5VCC

5VCC

0.1 μF, 25 VC8

ISNS+ISNS-

RP46/PWM1H/RB141

RP47/PWM1L/RB152

/MCLR3

OA1OUT/AN0/CMP1A/IBIAS0/RA04

OA1IN-/ANA1/RA15

OA1N+ /AN9/RA26

DACOUT/AN3/CMP1C/RA37

AN4/CMP3B/IBIAS3/RA48

AVDD9

AVSS10

VDD11

VSS12

OSCI/CLKI/AN5/RP32/RB013

OSCO/CLKO/AN6/RP33/RB114 OA2OUT/AN1/AN7/ANA0/CMP1D/CMP2D/CMP3D/RP34/INT0/RB2 151617181920212223242526

TDI/RP44/PWM2H/RB12TCK/RP43/PWM3L/RB11

TMS/RP42/PWM3H/RB10VDDVSS

PGC1/AN11/RP41/SDA1/RB9PGD1/AN10/RP40/SCL1/RB8TDO/AN2/CMP3A/RP39/RB7

PGC3/RP38/SCL2/RB6PGD3/RP37/SDA2/RB5

PGC2/OA2IN+/RP36/RB4PGD2/OA2IN-/AN8/RP35/RB3

27RP45/PWM2L/RB13 28

U2

DSPIC33CK32MP102-I/2N

MCLR

AVDD

3V3

3V3

10 KR23

3V3

MCLR

PWMQ1PWMQ2

PGDPGC

3V3 3V3

10nF, 25VC82

3V3

20 ΩR17

VOUT_SNS

9

27

16

4

3

8

10

5

HS lim

G ate

Drive

Power

Control

Direct control

C ompens ation&

Com p

EA+

-

Com p Timer ton to�

DCS -Contr ol

S leepContr ol

Control

Logic

PGN

DV

INPG

EN

NC

SLEEP

V OS

FB

AGND

SW

11

Ex Pad

U7TPS62175DQCR

2.2 μF, 25 VC23

GND

GND GND

3V3

10 μH

L2

22 μF, 16 V

C24

GND

3V3

3V3

5VCC3V1 500 mA max.

GND

0 Ω

R11 5VCC5V

5V

IREF

ISENSE

OA2IN+

IREF

VIN_SNSIREFDAC

IREFDAC OA2IN+

220 pF, 50 VC25

10k1 2R12

C26DNP

IREF

90.9 kR24

GND0 Ω

R27DNP

3V3

1 2Ferrite Bead 180 Ω 1 LN

R28 AVDD3V3AVDD

10nF, 25VC6

0.1uF, 25VC16

20 Ω

R54

31.6 KR26

MCLR 1

VDD 2

GND 3

PGD 4

PGC 5

J1

3V3

QUICK START GUIDEDem

onstration System EPC9153

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM

| ©2021 |

| 11

GND

VIN

G2

G1

Power stage

VOUT

1 mΩ

R46

0 ΩR47

33 pF, 50 V

C56

DNP

0 ΩR48

1 250 Ω @ 100 MHz

R45

33 pF, 50 V

C54

GND

1 250 Ω @ 100 MHz

R44

4.7 μF , 50 VC62 +

100 μF, 25 VC57

1 μF , 100 VC43

1 μF , 100 VC44

1 μF , 100 VC45

0.1 μF , 100 V

C39

GND

0.1 μF , 100 V

C40

GND

VIN

0.1 μF , 100 V

C41

GND

VIN

0.1 μF , 100 VC42

GND

VIN

GND

10 μF , 75 V

C46

10 μF , 75 V

C474.7 μF , 50 VC63

4.7 μF , 50 VC61

4.7 μF , 50 VC59

4.7 μF , 50 VC60

4.7 μF , 50 VC66

4.7 μF , 50 VC65

4.7 μF , 50 VC64 +

100 μF, 25 VC58

FD1

PCB Fiducial

FD2 FD3

1 μF , 100 VC69

0.1 μF , 100 V

C73

GND

10 μF , 75 V

C3410 μF , 75 VC35

10 μF , 75 VC67

10 μF , 75 VC78

SMD probe loop

1

TP2

SMD probe loop

1

TP1

SMD probe loop

1

TP3

SMD probe loop

1

TP4

VIN VIN

SW

ISN

S+

ISN

S-

S2

9774010243R

S5

9774010243R

GND

Heatspreader kit

S3

9774010243R

1 μF , 100 VC13

+15 μF, 75 VC14

GND

VIN

+15 μF, 75 VC17

GND

VIN

+15 μF, 75 VC18

GND

VIN

+15 μF, 75 VC20

GND

VIN

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VIN

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

Input capacitorsOutput capacitors

Synchronous bootstrap

22 nF , 25 V

C5

100 V 2.8 Ω

Q3

EPC2038

D1

BZT52C5V1LP-7

27 KR5

4.7 ΩR7

1 Ω R4

1 μF , 25 VC4

BTSTR

D30.1 μF , 25 VC21

GND

5VCC

D2

5VCC

G2ON

SW

A K

A

K

A

K

U6

uP1966A

GND

1 Ω R10 G2

1 Ω R8 G1

0.47 μF, 10 VC22

BTSTR

GND

G1ON

Gate driver circuit

G2ON

SW

5VCC

PWMQ1

PWMQ2

5VCC

+100 μF, 25 VC37

GND

VOUT

4.7 μF , 50 VC30

4.7 μF , 50 VC31

4.7 μF , 50 VC29

4.7 μF , 50 VC27

4.7 μF , 50 VC28

4.7 μF , 50 VC36

4.7 μF , 50 VC33

4.7 μF , 50 VC32

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

GND

VOUT

4.8 μHL3

VIN

GND

VOUT

GND

Input & output terminals

100 V 2.5 mΩ

Q1EPC2218

100 V 2.5 mΩ

Q2EPC2218

Nylon standoffs

J2 J3

J5J4

SC1M2 Screw

SC2M2 Screw

SC3M2 Screw

HS1Heatsink

t-Global

4.7 mm x 5.6 mmTG-X x y 0.5

TIM1ThermalMaterial

HIGH VOLTAGE

Figure 17: EPC9153 Power Stage schematic



EPC would like to acknowledge Microchip Technology Inc. (www.microchip.com) for their support of this project.

Microchip Technology Incorporated is a leading provider of smart, connected and secure embedded control solutions. Its easy-to-use development tools and comprehensive product portfolio enable customers to create optimal designs, which reduce risk while lowering total system cost and time to market. The company’s solutions serve customers across the industrial, automotive, consumer, aerospace and defense, communications and computing markets.

The EPC9153 system features the dsPIC33CK32MP102 16-Bit Digital Signal Controller with High-Speed ADC, Op Amps, Comparators and High-Resolution PWM. Learn more at www.microchip.com.

https://www.microchip.com/

https://www.microchip.com/wwwproducts/en/dsPIC33CK32MP102

https://www.microchip.com/

Demonstration Board NotificationThe EPC9153 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 [email protected] your local sales representative

Visit our website: www.epc-co.com

Sign-up to receive EPC updates atbit.ly/EPCupdates or text “EPC” to 22828

http://www.digikey.com/

mailto:[email protected]

https://epc-co.com

bit.ly/EPCupdates

demonstration system epc9153 quick start guide - epc-co.com

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