Demonstration System

EPC9151 Quick Start Guide

18–60 V Input, 12 V, 25 A Output (Buck)
12–15 V Input, 48 V, 5.5 A Output (Boost)
300 W 1/16 th Brick Evaluation Module

Revision 1.0
 QUICK START GUIDE Demonstration System EPC9151

DESCRIPTION
The EPC9151 1/16th brick evaluation power module is designed for 48 V to/from
12 V DC-DC applications. It features the EPC2152 ePower™ stage – enhancement
mode eGaN® field effect transistors (FETs) with integrated gate drivers, as well as the
Microchip dsPIC33CK32MP102 16-bit digital controller. Other features include:
• High efficiency: 95% @ 12 V/25 A output (buck)
95% @ 48 V/5.5 A output (boost)
• Dimension: 33 mm x 22.9 mm x 9 mm (1.30 in. x 0.90 in. x 0.35 in.)
• Industry standard footprint and pinout
• Power good output
• Constant switching frequency: 500 kHz
• Remote output voltage sense (buck)
• Re-programmable – Average current mode control (default) EPC9151 top view
• Fault protection:
o Input undervoltage
o Input overvoltage
o Regulation error
o Inductor overcurrent

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

FIRMWARE UPDATES
The module is programmed as a Buck converter by default. To change to Boost
converter, please re-program the module with the boost firmware. Using the
incorrect firmware could result in damage. EPC9151 bottom view

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.

Table 1: Maximum Ratings

Symbol Parameter Conditions Min Max Units
Buck 65
VIN Input voltage V
Boost 17
Buck 25
IOUT Output current A
Boost 5.5
Measured at FET case as
Operating indicated in thermal
TC 100 °C
temperature measurement figure,
airflow 1700 LFM

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 2

 QUICK START GUIDE Demonstration System EPC9151
Table 2: Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Units
Buck 18 48 60
VIN Input voltage Boost, during operation 11.3 12 15
Boost, start up 12.3 12.5 15
Buck 18
VIN,on Input UVLO turn on voltage
Boost 12.3 V
Buck 17.5
VIN,off Input UVLO turn off voltage
Boost 11.3
Buck 5 12 15
VOUT Output voltage
Boost 20 48 50
Buck 200 550
COUT External capacitance load uF
Boost 47
tOUT,rise Output voltage rise time 100 ms
Buck, IOUT = 25 A, COUT = 200 μF 100
ΔVOUT Output voltage ripple mV
Boost, IOUT = 5.5 A, COUT = 47 μF 600
IOUT Buck 0 25
Output current
Boost 0 5.5
A
Buck 26 27
IOUT,limit Output current limit threshold
Boost 6 6.8
fs Switching frequency 500 kHz
On/off control input logic
Von /Voff Function not available Not implemented 0 3.3 V
Power good output logic
Pgood Logic high (in regulation) 2.6 3.1 3.3
V
Pgood Logic low (not regulated) 0 0.25 0.7

TYPICAL EFFICIENCY AND POWER LOSS

96 16

14
94
12
Efficiency (%)

10
Loss (W)

92
8
400 LFM 6 400 LFM
90
1700 LFM 1700 LFM
4

88 2
0 5 10 15 20 25 0 5 10 15 20 25
IOUT (A) IOUT (A)
Figure 1. 48 V input, 12 V output (Buck)

96 16

14
94
12
Efficiency (%)

10
Loss (W)

92
8

9151 Boost, 6
90 9151 Boost,
1700 LFM 1700 LFM
4

88 2
0 1 2 3 4 5 6 0 1 2 3 4 5 6
IOUT (A) IOUT (A)
Figure 2. 12 V input, 48 V output (Boost)

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 3

 QUICK START GUIDE Demonstration System EPC9151

ELECTRICAL PERFORMANCE
Typical output voltage ripple

1 μs/div 1 μs/div
50 mV/div 200 mV/div

Figure 3: VIN = 48 V, VOUT = 12 V, IOUT = 25 A (Buck) Figure 4: VIN = 12 V, VOUT = 48 V, IOUT = 5.5 A (Boost)

Typical transient response

VOUT VOUT

25 A

5A
IOUT 12.5 A
IOUT 2.5 A

1 ms/div 1 ms/div
500 mV/div 2 V/div
5 A/div 2 A/div

Figure 5: VIN = 48 V, VOUT = 12 V, output 50% (12.5 A) to Figure 6: VIN = 12 V, VOUT = 48 V, output 45% (2.5 A) to
100% (25 A), 250 Hz transitions (Buck) 90% (5 A), 250 Hz transitions (Boost)

Startup waveform

Power Good (Pin 5)

Power Good (Pin 5)

VOUT
VOUT

100 ms/div 100 ms/div

4 V/div 10 V/div
2 V/div 2 V/div

Figure 7: VIN = 48 V (Buck) Figure 8: VIN = 12 V (Boost)

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 4

 QUICK START GUIDE Demonstration System EPC9151

ELECTRICAL PERFORMANCE (continued)

Typical load regulation

12.14 48.30

12.13
48.25
12.12
VOUT (V)

VOUT (V)
12.11 48.20

12.10
48.15
12.09

12.08 48.10
0 5 10 15 20 25 0 1 2 3 4 5 6
IOUT (A) IOUT (A)

Figure 9: VIN = 48 V, VOUT = 12 V (Buck) Figure 10: VIN = 12 V, VOUT = 48 V (Boost)

Temperature vs. output current

100 100

90 90
Temperature (°C)

Temperature (°C)

80 80

70 70

60 60

50 50

40 40
0 5 10 15 20 25 0 1 2 3 4 5 6
IOUT (A) IOUT (A)

Figure 11: VIN = 48 V, VOUT = 12 V, 1700 LFM, Buck Figure 12: VIN = 12 V, VOUT = 48 V, 1700 LFM, Boost

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 5

 QUICK START GUIDE Demonstration System EPC9151

OPERATING CONSIDERATIONS
Buck/Boost Modes Power good
The module is programmed with Buck mode by default. To operate This module features a power good signal with 3.3 V logic. This signal
as a Boost converter, please download the firmware for Boost mode will be logic high when the output voltage is regulated to +/- 10%
and re-program the module. In Boost mode, input voltage (12 V) is of the set point; and logic low for all other conditions. The maximum
supplied to the Vout+ pin, and the output is at the Vin+ pin. sink/source current on this pin is 6 mA. If the power good feature is
Output capacitance not used, the pin should be left floating.

Minimum external output capacitance of 200 μF is required for Output voltage trim (adjustment)
stability. The maximum capacitance tested is 550 μF. The EPC9531 For Buck mode only: the output voltage of this module can be
test fixture includes this extra capacitance. trimmed (adjusted) by connecting an external resistor between
Input capacitance the Trim pin and Vout- (GND) pin. The new output voltage can be
calculated as follows:
To minimize the impact from the input voltage feeding line, low-
ESR capacitors should be located at the input to the module. It is
recommended that a 33 μF–100 μF input capacitor be placed near
VOUT = VFB RFB1 ( 1
RFB2
+
1
R1 ) + VFB
the module. This will also be the external output capacitance in boost
mode. For this design, VFB is 2.5 V, RFB1 is 18 kΩ, RFB2 is 4.75 kΩ, therefore
Over-current protection
45
If the load current exceeds a pre-determined maximum setpoint, this VOUT = 12 +
R1 [kΩ]
condition will be regarded as a fault condition and the module will
shut down. The module will then attempt to restart after 2 seconds.
The maximum trim voltage is 1 V using this method. It is recom-
This shut down and restart cycle will continue until the over-current mended to re-program the controller to further change the output
condition clears. voltage set point.
Remote On/Off
This feature is not implemented for this module. Please leave EN pin 8 Vout+
floating.
7 Sense+
VFB RFB1
Remote sense 6 Trim
For Buck mode only: remote sense can compensate for output RFB2 R1
voltage distribution drops by sensing the actual output voltage at the
4 Vout–(GND)
point of load. The maximum voltage allowed between the output and
sense pins is 5% of the output voltage (0.6 V for 12 V output). If the
remote sense feature is not used, the pin can be either left floating or Figure 13. External resistor connection for output voltage trim adjust.
connected to Vout+.

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 6

 QUICK START GUIDE Demonstration System EPC9151

CONTROLLER
The EPC9151|1/16th brick evaluation power module features a the behavior of the converter to application specific requirements
Microchip dsPIC33CK32MP102 Digital Signal Controller (DSC). without the need for modifying hardware.
This 100 MHz single core device is equipped with dedicated peripheral There are two firmware versions available for the EPC9151 1/16th
modules for Switched-Mode Power Supply (SMPS) applications, such brick evaluation power module in buck mode: average current mode
as a feature-rich 4-channel (8x output), 250 ps resolution pulse- control (ACMC) and adaptive voltage mode control (AVMC). For the
width modulation (PWM) logic, three 3.5 Msps Analog-To-Digital boost mode, only ACMC is available.
Converters (ADC), three 15 ns propagation delay analog comparators
with integrated Digital-To-Analog Converters (DAC) supporting ramp • Conventional, Robust Average Current Mode Control (ACMC)
signal generation, three operational amplifiers as well as Digital (figure 14): With this firmware the power converter is controlled
Signal Processing (DSP) core with tightly coupled data paths for high- by one outer voltage loop providing a shared reference to two
performance real-time control applications. The device used is the independent inner average current loops controlling the phase
smallest derivative of the dsPIC33CK single core and dsPIC33CH dual current of each converter phase. This conventional approach
core DSC families. The device used in this design comes in a 28 pin ensures proper current balancing between both phases of this
6x6 mm UQFN package, specified for ambient temperatures from interleaved converter, operating 180° out of phase to minimize
-40 to +125° C. Other packages including a 28 pin UQFN package with the input current ripple and filtering. The inner current loops are
only 4x4 mm are available. adjusted to average cross-over frequencies of 10 kHz. To balance
the current reference perturbation of the inner current loops, the
The dsPIC33CK device is used to drive and control the converter in a outer voltage loop has been adjusted to an average cross-over
fully digital fashion where the feedback loops are implemented and frequency of 2 kHz, which determines the overall response time of
executed in software. Migrating control loop execution from analog the converter.
circuits to embedded software enhances the flexibility in terms of
applied control laws as well as making modifications to the feedback For Buck mode only:
loop and control signals during runtime, optimizing control schemes • Adaptive Type IV Voltage Mode Control (AVMC) with featuring
and adapting control accuracy and performance to most recent Adaptive Gain Control (AGC) and Phase Current Balancing PWM
operating conditions. As a result, digital control allows users to tailor Steering (figure 15): The second, alternative firmware is tailored
to intermediate bus converter module applications in power
distribution networks (PDN). The major focus of this firmware lies on
REF +
error HC(z) VOUT reducing PDN segment decoupling capacitance by maximizing the
– Compensator control bandwidth and the output impedance tuning capabilities,
Voltage Loop Voltage
Divider enhancing system robustness while minimizing cost.
Anti-Windup
input output
ADC
output IOUT
error HC(z) Gp(s)
REF +
Compensator PWM
– (Plant A)
Current
Current Loop A Sense
Amp
input
ADC
output IOUT
error HC(z) Gp(s)
REF +
– Compensator PWM (Plant B)
Current
Current Loop B Sense
Amp
input Current Feedback IPH_A IPH_B
ADC
(10 kHz state machine)
Current Current
Figure 14. Interleaved buck converter average current mode control Offset Sense A Sense B
Compare
ADC
ADC

Voltage Feedback
(500 kHz cycle-by-cycle control) Gp(s)
+/– VIN
(Plant A)
output VOUT
error PWM
REF +
HC(z) Distribution
– Compensator Gp(s) Voltage Voltage
Anti- (Plant B) Divider Divider
Windup
input ADC
Figure 15. Interleaved buck converter Adaptive Gain ADC
Control (AGC)
advanced voltage mode control

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 7

 QUICK START GUIDE Demonstration System EPC9151

PROGRAMMING
The Microchip dsPIC33CK controller can be re-programmed using the in-circuit serial programming port (ICSP) available on the RJ-11
programming interface. It supports all of Microchip’s in-circuit programmers/debuggers, such as MPLAB® ICD4, MPLAB® REAL ICE or MPLAB®
PICkit4 and previous derivatives.

Development tools: https://www.microchip.com/development-tools

Programming with HEX file

Download the latest MPLAB IPE from Microchip website and follow the steps below:
https://www.microchip.com/mplab/mplab-integrated-programming-environment

1 Enable Advanced Mode:

Optional: Enable ‘Power target circuit from programming tool’ from

left panel ‘power’ tab so that no additional power supply is necessary
during programming:

2 Select Device: dsPIC33CK32MP102 and then apply:

3 Select programming tool and then connect: 5 Erase device, and then program device:

② Program ① Erase

4 Click ‘Browse’ to select the provided .hex file:

C:\XXX\...\*.HEX

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 8

 QUICK START GUIDE Demonstration System EPC9151

MECHNICAL SPECIFICATIONS
Pin 1 Chamfer Pin 1
Top view Bottom view

22.9 (0.90)

Pin 4
33.0 (1.30)
Front view

9.0 (0.35)

3.8 (0.15)
Note: Dimensions are in mm (inches)

Figure 16. EPC9151 mechanical dimensions

Top view Bottom view

1 Vin+ 8 Vout+ 8 1
7 Sense+ 7
6 MCLR 2
2 On/Off (Not used) 6 Trim 3.3 V
5 Power good 5 GND
PGD
3 Vin– (GND) 4 Vout–(GND) 4 PGC 3

Microchip Programming /
Communication Interface

Figure 17. Pin assignment

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 9

 QUICK START GUIDE Demonstration System EPC9151

THERMAL MANAGEMENT
Thermal management is very important to ensure proper and reliable Thermal derating
operation. Sufficient cooling is required for this module to operate in Without sufficient cooling, the output current capability is reduced.
the full specified output current range. Forced air of 1700 LFM is used The module temperature should be monitored to ensure the
for specification testing. maximum temperature does not exceed the rating. Especially when
the input voltage is higher than 48 V, the maximum output current
Heatsink or heat spreader can also be used.
is reduced.
The hot spots are the GaN ICs (U1 and U2) as shown in figure 18.

U1

U1

U2
U2

Figure 18. VIN = 48 V, VOUT = 12 V, 1700 LFM forced air cooling

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 10

 QUICK START GUIDE Demonstration System EPC9151
Table 3: Bill of Materials
Item Qty Reference Part Description Manufacturer Part #
1 14 C1, C2, C3, C9, C11, C15, C16, C19, C21, C26, C31, C35, C48, C51 1 μF, 100 V TDK C2012X7S2A105M125AB
2 10 C5, C6, C7, C8, C10, C27, C28, C29, C30, C37 22 μF, 25 V Murata GRT21BR61E226ME13L
C12, C13, C20, C23, C24, C25, C32, C36, C40, C41, C42, C43, C44, C45,
3 16 220 nF, 100 V Taiyo Yuden HMK107C7224
C46, C47
4 7 C14, C22, C38, C49, C50, C62, C65 0.1 μF, 25 V Yageo CC0402KRX7R8BB104
5 2 C17, C18 2.2 μF, 25 V Murata GRM155R61E225KE11D
6 2 C33, C34 1 nF, 25 V Murata GRM1555C1E102JA01D
7 1 C39 10 nF, 25 V Kemet C0402C103K4RECAUTO
8 2 C60, C63 51pF, 50 V Murata GRM1555C1H510JA01D
9 2 C61, C64 2.2 μF, 25 V Murata GRM155R61E225ME15D
10 2 C67, C69 10 nF, 50 V Murata GRM155R71H103KA88D
11 1 C68 220pF, 50 V Kemet C0402C221K5RACTU
12 1 C90 0.22 μF, 100 V Taiyo Yuden HMK107C7224KAHTE
13 1 C91 1 μF, 16 V TDK C1005X6S1C105K050BC
14 1 C92 10 nF, 100 V TDK C1005X7S2A103K050BB
15 1 C93 10 μF, 16 V Murata GRM188R61C106KAALD
16 1 C94 3300pF, 100 V TDK CGA2B3X7S2A332M050BB
17 1 C95 0.1 μF, 50 V Murata GRM155R71H104KE14J
18 2 C96, C98 1 μF, 25 V Murata GRT155R61E105ME01D
19 1 C97 22 μF, 6.3 V Samsung CL05A226MQ5N6J8
20 2 D1, D2 80 V, 125 mA Diodes 1N4448HLP-7
21 6 J1, J2, TP1, TP2, TP9, TP10 .040 dia pin Mill-Max 3102-1-00-21-00-00-08-0
22 1 J3 1 mm Header Molex 5013310507
23 2 J4, J5 .062 dia pin Mill-Max 3144-1-00-15-00-00-08-0
24 2 L1, L2 2.4 μH TDK B82559A0242A013
25 1 L90 220 μH 190 mA Taiyo Yuden CBC3225T221KR
26 1 L91 10 μH Taiyo Yuden CBC2016T100M
27 1 R1 6.8 k Yageo RC0402JR-076K8L
28 4 R2, R3, R4, R5 10 Ω Panasonic ERJ-2RKF10R0X
29 1 R20 20 Ω Yageo RC0402FR-0720RL
30 1 R21 110 k Panasonic RC0603FR-07110KL
31 1 R22 4.87 k Panasonic ERA-2AEB4871X
32 1 R23 18 k Panasonic ERA-2AEB183X
33 1 R24 4.75 k Panasonic ERA-2AEB4751X
34 1 R26 Ferrite Bead 180 Ω 1 LN Murata BLM18PG181SN1D
35 4 R32, R33, R34, R35 22 k Yageo RC0402JR-0722KL
36 2 R61, R62 1 mΩ Susumu KRL2012E-M-R001-J-T5
37 1 R63 10 k Yageo RC0402JR-0710KL
38 2 R64, R65 20 Ω Yageo RC0402FR-0720RL
39 1 R90 300 k Stackpole RMCF0603FT300K
40 1 R91 3.65 k Panasonic ERA-2AEB3651X
41 1 R92 31.6 k Panasonic ERA-2AEB3162X
42 1 R94 51 k Stackpole RMCF0603FT51K0
43 1 R95 0Ω Yageo RC0402JR-070RL
44 1 R98 16.5 k Yageo RC0402FR-0716K5L
45 1 R99 86.6 k Yageo RC0603FR-0786K6L
46 2 U1, U2 80 V, 10 mΩ EPC EPC2152
47 1 U20 dsPIC Microchip DSPIC33CK32MP102-E/2N
48 2 U61, U62 current sense amplifier Microchip MCP6C02T-050E/CHY
49 1 U90 Buck Regulator 100 V, 300 mA Texas Instruments LM5018SD/NOPB
50 1 U91 IC REG BUCK 3.3 V TI TPS62177DQCR

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 11

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 |

QUICK START GUIDE

VIN VOUT
3.3V Supply
VIN_D
C91 3V3 100 mA max.
VIN 1 uF, 16 V
D1 D2
C90 VIN_D
J1
0.22 μF, 100 V Program ming Port
VIN_D VCC12V R95

6
R99 U90
86.6 k Vin VCC LM5018SD/NOPB 0Ω
20µA
Diode OR PGC
1
Reg

2
3 UVLO U91 PGD
2
J2 1μF, 25 V TPS62177DQCR PGND

V IN
PG
1.225V 3 3
R98 VIN_D BST 7 C98
EN 3V3
C92 Control HS lim 4
16.5 k 0.66V MCLR
SD 10 nF, 100 V 4 5
NC Logic Com p
R90 4 Ron J3
Timer Logic L90 VCC12V
SW 8 DNP
PGND 300 k G ate L91
3V3 8 SLEEP S leep Power 9 3V3
OV 220 μH 190 mA 3V3
1.62V C94 R92 Contr ol
Control Drive
SW 10 μH
3300 pF, 100 V 31.6 k
12 V Supply 5 FB Ilim R94
C93 3V3 10
1 uF, 25 V 22 μF, 6.3 V

1
V OS
1.225V 51 k 10 μF, 16 V
Direct control
& C96 C97 R1
UVLO Setting: 8 V on, 1.7 V hystersis C95 5
C ompens ation
Com p Timer ton toff
Gnd FB
- 6.8 k
fs: 400 kHz 0.1 uF, 50 V +
EA

PGND
DCS -Contr ol

2
1
Ex Pad AGND

R91 MCLR

11

1
3.65 k

3V3

MCP6C02T -050E/CHY

6
U20 U61
1 28 PWM1L CS1+ 3 V IP V DD
R64
VIN VOUT RP46/PWM1H/RB14 RP45/PWM2L/RB13 V OUT 1 ISENSE1
2 27 PWM1H VOUT 4 V IM
GM1 RM 3
RP47/PWM1L/RB15 TDI/RP44/PWM2H/RB12 20 Ω
MCLR 3 26
/MCLR TCK/RP43/PWM3L/RB1 1 GM2
V REF 5 IREF ISENSE1 3V3 3V3
ISENSE1 4 25 EN V SS
R21 R20 OA1OUT/AN0/CMP1A/IBIAS0/RA0 TMS/RP42/PWM3H/RB10
1 10 k 20 Ω ISENSE2 5 24 3V3
OA1IN-/ANA1/RA1 VDD

2
PGND 6 23 PGND IREFDAC 1 R63 2 OA2IN+ C60 C61 C62
OA1IN+ /AN9/RA2 VSS
VIN_SNS VOUTS IREFDAC 7 22 PWM2H 51 pF, 50 V 2.2 μF, 25 V 0.1 μF, 25 V
DACOUT/AN3/CMP1C/RA3 PGC1/AN1 1/RP41/SDA1/RB9 10 k
VOUT_SNS 8 21 PWM2L C68
AN4/CMP3B/IBIAS3/RA4 PGD1/AN10/RP40/SCL1/RB8
R22 AVDD 9 20 VIN_SNS 220 pF, 50 V
C33 AVDD TDO/AN2/CMP3A/RP39/RB7
4.87 k R23 PGND 10 19 PGC
1 nF, 25 V 18 k AVSS PGC3/RP38/SCL2/RB6
3V3 11 18 PGD
VOUT_SNS VDD PGD3/RP37/SDA2/RB5
PGND 12 17 OA2IN+ 3V3
VSS PGC2/OA2IN+ /RP36/RB4
13 16
R24 OSCI/CLKI/AN5/RP32/RB0 PGD2/OA2IN-/AN8/RP35/RB3
PG 14 15 IREF
4.75 k OSCO/CLKO/AN6/RP33/RB1 OA2OUT/AN1/AN7/ANA0/CMP1D/CMP2D/CMP3D/RP34/INT0/RB2 MCP6C02T -050E/CHY
C34

6
1 nF, 25 V DSPIC33CK32MP102-E/2N U62
CS2+ 3 V IP V DD
R65
V OUT 1 ISENSE2
TP1 VOUT 4 V IM
GM1 RM 3
20 Ω
PG
1 GM2
5 IREF
V REF
ISENSE2 3V3 3V3
.040 dia pin J4 V SS

VOUT

2
TP2
EN C63 C64 C65
1 51 pF, 50 V 2.2 μF, 25 V 0.1 μF, 25 V
.040 dia pin
J5
TP9
VOUTS
3V3 3V3 3V3 AVDD 1

Demonstration System EPC9151

1 R26 2 .040 dia pin
Ferrite Bead 180 Ω 1 LN TP10
C38 VOUT_SNS
C39 C50 C49 1
0.1 μF, 25 V PGND
10 nF, 25 V 0.1 μF, 25 V 0.1 μF, 25 V .040 dia pin

Figure 19: EPC9151 Controller schematic

| 12
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 |

QUICK START GUIDE

VIN VIN VIN VIN VIN VIN VIN VIN
VIN VIN VIN VIN VIN VIN VIN

C44 C45 C46 C47 C23 C12 C24 C25 C19 C21 C35 C9 C11 C26 C31
220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V

VIN VIN VIN VIN VIN VIN VIN VIN

VIN VIN VIN VIN VIN VIN VIN

C40 C41 C42 C43 C20 C13 C32 C36

220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V 220 nF, 100 V C2 C3 C1 C15 C16 C48 C51
1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V 1uF, 100V

C14
U1 0.1uF, 25V
R2 R3
10 Ω Vdd12 10 Ω
VCC12V 1 2 2 Vdd12F 1 1 2 SW1
Sync
boot
C17
Vin 5,9 VIN
2.2 μF, 25 V
PWM1H 3 HSin Level Output
Shift Driver VOUT
Logic
R32 L1
+ R61 VOUT
22 k SW 6,7 SW1 CS1+
UVLO Vdd12 10,11 B82559A0242A013 1 mΩ
+ C67
PWM1L 4 LSin POR 2.4 μH
Output 10 nF, 50 V
Driver C5 C6 C7 C8 C10
R33 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V
22 k 8 Vss Vss 8,12
PGND
EPC2152
PGND

C22
U2 0.1uF, 25 V
R4 R5
10 Ω Vdd12 10 Ω
VCC12V 1 2 2 Vdd12F 1 1 2 SW2
Sync
C18 boot VOUT
2.2 μF, 25 V Vin 5,9 VIN

Demonstration System EPC9151

PWM2H 3 HSin Level Output
Shift Driver
Logic VOUT
R34 L2 C27 C28 C29 C30 C37
22 k + SW 6,7 SW2 CS2+ R62 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V 22 μF, 25 V
UVLO Vdd12 10,11 2.4 μH 1 mΩ
+ B82559A0242A013
PWM2L 4 LSin POR C69
Output 10 nF, 50 V
Driver
R35
22 k 8 Vss Vss 8,12
PGND
EPC2152

PGND

Figure 20: EPC9151 Power Stage schematic

| 13
 QUICK START GUIDE Demonstration System EPC9151

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 EPC9151 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.

EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2020 | | 14

 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

EPC Products are distributed through Digi-Key.

www.digikey.com

Demonstration Board Notification

The EPC9151 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.