EPC EPC9112 User manual

Demonstration
System EPC9112
Quick Start Guide
6.78 MHz, ZVS Class-D Wireless Power System
using EPC2007C / EPC2038

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Demonstration System EPC9112
DESCRIPTION
The EPC9112 wireless power demonstration system is a high eciency,
A4WP compatible, Zero Voltage Switching (ZVS), Voltage Mode class-D
wireless power transfer demonstration kit capable of delivering up to
35 W into a DC load while operating at 6.78 MHz (Lowest ISM band).
The purpose of this demonstration system is to simplify the evaluation
process of wireless power technology using eGaN® FETs.
The EPC9112 wireless power system comprises the three boards (shown
in Figure 1) namely:
1) A Source Board (Transmitter or Power Amplier) EPC9507
2) A Class 3 A4WP compliant Source Coil (Transmit Coil)
3) A Category 3 A4WP compliant Device Coil with rectier and DC
smoothing capacitor.
The amplier board features the EPC2007C and EPC2038 enhancement
mode eld eect transistors (FET) in an optional half-bridge topology
(single ended conguration) or default full-bridge topology (dierential
conguration), and includes the gate driver/s and oscillator that ensures
operation of the system at 6.78 MHz. This revision of the wireless
demonstration amplier includes a synchronous bootstrap FET supply
for the upper FETs of the ZVS class-D amplier that eliminates the reverse
recovery losses of the gate driver’s internal bootstrap diode that dissipates
energy in the upper FET. This circuit has been implemented using the new
EPC2038 eGaN FET specically designed for this function. To learn more
about the synchronous bootstrap supply please refer to the following [1,
2, 3]. The EPC9507 amplier board can also be operated using an external
oscillator or by using the included new ultra low power Diashinku oscillator.
This revision can operate in either Single ended or Dierential mode by
changing a jumper setting. This allows for high eciency operation with
load impedance ranges that allow for single ended operation.
Finally, the timing adjust circuits for the ZVS class-D ampliers have
been separated to further ensure highest possible eciency setting and
includes separate ZVS tank circuits.
Table 1: Performance Summary (TA= 25 °C) EPC9507
Symbol Parameter Conditions Min Max Units
VDD Control Supply Input Range 7 12 V
VIN
Bus Input Voltage Range –
Pre-Regulator Mode 8 36 V
VIN
Bus Input Voltage Range –
Bypass Mode 0 80 V
VOUT Switch Node Output Voltage VIN - 2 V V
IOUT
Switch Node Output Current (ea.)
6* A
Vextosc External Oscillator Input Threshold Input ‘Low’ -0.3 0.8 V
Input ‘High’ 2.4 5 V
VPre_Disable
Pre-regulator Disable
Voltage Range
Open drain/
collector -0.3 5.5 V
IPre_Disable Pre-regulator Disable Current Open Drain/
Collector -1 1 mA
VOsc_Disable
Oscillator Disable
Voltage Range
Open Drain/
Collector -0.3 5 V
IOsc_Disable
Oscillator Disable
Current
Open Drain/
Collector -25 25 mA
1
Amplier Board
Source Coil
Device Board
220 mm
168 mm
64 mm
45 mm
50 mm
80 mm
* Assumes inductive load, maximum current depends on die temperature – actual maximum current with be subject to
switching frequency, bus voltage and thermals.
The amplier board is equipped with a pre-regulator that limits the DC
current of the supply to the amplier. As the amplier draws more current,
which can be due to the absence of a device coil, the pre-regulator will
reduce the voltage being supplied to the amplier that will ensure a
safe operating point. The pre-regulator also monitors the temperature
of the main amplier FETs and will reduce current if the temperature
exceeds 85°C. The pre-regulator can be bypassed to allow testing with
custom control hardware. The board further allows easy access to
critical measurement nodes that allow accurate power measurement
instrumentation hookup. A simplied diagram of the amplier board is
given in Figure 1.
The Source and Device Coils are Alliance forWireless Power (A4WP) compliant
and have been pre-tuned to operate at 6.78 MHz with the EPC9507 am plier.
The source coil is class 3 and the device coil is category 3 compliant.
The device board includes a high frequency schottky diode based full
bridge rectier and output lter to deliver a ltered unregulated DC
voltage. The device board comes equipped with two LED’s, one green
to indicate the power is being received with an output voltage equal
or greater than 4 V and a second red LED that indicates that the output
voltage has reached the maximum and is above 37 V.
For more information on the EPC2007C or EPC2038 eGaN FET please refer
to the datasheet available from EPC at www.epc-co.com. The data-sheet
should be read in conjunction with this quick start guide.
The Source coil used in this wireless power transfer demo system is pro-
vided by NuCurrent (nucurrent.com). Reverse Engineering of the Source
coil is prohibited and protected by multiple US and international patents.
For additional information on the source coil, please contact NuCurrent
direct or EPC for contact information.
[1] Wireless Power Handbook
[2] Performance Comparison for A4WP Class-3
Wireless Power Compliance between
eGaN FET and MOSFET in a ZVS class-D Amplier
[3] EPC2038 datasheet
Figure 1: EPC9112
Demonstration System
Table 2: Performance Summary (TA= 25 °C) Category 3 Device Board
Symbol Parameter Conditions Min Max Units
VOUT Output Voltage Range 0 38 V
IOUT Output Current Range 0 1.5# A
# Actual maximum current subject to operating temperature limits

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Demonstration System EPC9112
MECHANICAL ASSEMBLY
The assembly of the EPC9112 Wireless Demonstration kit is simple and
shown in Figure 1.The source coil and amplier have been equipped with
reverse polarity SMA connectors. The source coil is simply connected to
the amplier.
The device board does not need to be mechanically attached to the
source coil.
DESCRIPTION
The Amplier Board (EPC9507)
Figure 1 shows a diagram of the EPC9507 ZVS class-D amplier with pre-
regulator. The pre-regulator is set to a specied DC current limit (up to 1.5
A) by adjusting P49 and operates from 8 V through 36 V input. The output
voltage of the pre-regulator is limited to approximately 2 V below the
input voltage. The pre-regulator can be bypassed by moving the jumper
(JP60) over from the right 2 pins to the left 2 pins. To measure the current
the amplier is drawing, an ammeter can be inserted in place of the jumper
(JP60) in the location based on the operating mode (pre-regulator or bypass).
The amplier comes with its own oscillator that is pre-programmed to 6.78
MHz ± 678 Hz. It can be disabled by placing a jumper into J70 or can be
externally shutdown using an externally controlled open collector / drain
transistor on the terminals of J70 (note which is the ground connection). The
switch needs to be capable of sinking at least 25 mA. An external oscillator
can be used instead of the internal oscillator when connected to J71 (note
which is the ground connection) and the jumper (JP70) is moved from the
right 2 pins to the left 2 pins.
The pre-regulator can also be disabled in the same manner as the oscillator
using J51. The pre-regulator can be bypassed, to increase the operating
voltage (with no current or thermal protection) to the amplier or to use
an external regulator, by moving the jumper JP60 from the right 2 pins to
the left 2 pins. Jumper JP60 can also be used to connect an ammeter to
measure the current drawn by the amplier (make sure the ammeter
connects to the pins that correspond to the mode of operation either
bypass or pre-regulator).
Single Ended Operation Hardware implementation
The amplier can be congured for single ended operation where only
devices Q1 and Q2 are used. In this mode only LZVS1 and CZVS are used to
establish ZVS operation. If a permanent single ended conguration is
required and Q11 and Q12 are populated, then the following changes
need to be made to the board:
1) Remove R77 and R78 OR P77 and P78
2) Short out C42_2 and C43_2
3) Short the connection of JMP1 (back side of the board)
4) Remove LZVS12 (if populated)
5) Add LZVS2 (390 nH)
6) Check that CZVS2 is populated, if not then install.
7) R71 and R72 may need to be adjusted for the new operating
condition to achieve maximum eciency (see section on ZVS timing
adjustment).
ZVS Timing Adjustment
Setting the correct time to establish ZVS transitions is critical to achieving
high eciency with the EPC9507 amplier. This can be done by selecting
the values for R71, R72, R77, and R78 respectively. This procedure is best
performed using potentiometers P71, P72, P77, and P78 installed that is
used to determine the xed resistor values. The procedure is the same for
both single ended and dierential mode of operation (as applicable per
operating mode). The timing MUST initially be set WITHOUT the source coil
connected to the amplier. The timing diagrams are given in Figure 4 and
should be referenced when following this procedure. Only perform these
steps if changes have been made to the board as it is shipped preset.
The steps are:
1. Remove the jumper in JP60 and insert it into J51 to place the EPC9507
amplier in bypass mode. With power o connect the main input
power supply (+) bus to the center pin of JP60 (pin 2) and the ground of
the main power to the ground (-) connection of J50 -VIN.
2. With power o, connect the control input power supply bus to +VDD
(J90). Note the polarity of the supply connector.
3. Connect a LOW capacitance oscilloscope probe to the probe-hole J2
between the two eGaN FETs Q10_x and Q11_x and lean against the
ground post as shown in Figure 3.
4. Turn on the control supply – make sure the supply is between 7V and 12
V range (7.5 V is recommended).
5. Turn on the main supply voltage to the required predominant
operating value (such as 24 V but NEVER exceed the absolute
maximum voltage of 36 V).
6. While observing the oscilloscope adjust P71 or P77 for the rising
edge of the waveform so achieve the green waveform of gure 4.
Repeat for the falling edge of the waveform by adjusting P72 or P78.
Repeat for the other eGaN FET pair if using dierential mode operation.
7. Check that the setting remains optimal with a source coil attached.
In this case it is important that the source coil is TUNED to resonance
WITH an applicable load. Theoretically the settings should remain
unchanged. Adjust if necessary.
8. Replace the potentiometers with xed value resistors. Congure the
EPC9507 amplier back to normal operation by removing the power
connections to J50 and JP60, removing the jumper in J51 and inserting
it back into JP60 (right 2 pins 2 & 3).
Determining Component Values for LZVS
The ZVS tank circuit is not operated at resonance, and only provides the
necessary negative device current for self-commutation of the output
voltage at turn o. The capacitance CZVS is chosen to have a very small
ripple voltage component and is typically around 1 µF. The amplier supply
voltage, switch-node transition time will determine the value of inductance
for LZVSx which needs to be sucient to maintain ZVS operation over the DC
device load resistance range and coupling between the device and source
coil range and can be calculated using the following equation:
(1)
LZVS = ∆tvt
8 ∙ fsw∙ COSSQ

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Demonstration System EPC9112
Where:
Δtvt = Voltage transition time [s]
fsw = Operating frequency [Hz]
COSSQ = Charge equivalent device output capacitance [F].
Note that the amplier supply voltage VAMP is absent from the
equation as it is accounted for by the voltage transition time.
The charge equivalent capacitance can be determined using the
following equation:
(2)
To add additional immunity margin for shifts in coil impedance, the
value of LZVS can be decreased to increase the current at turn o
of the devices (which will increase device losses). Typical voltage
transition times range from 2 ns through 12 ns. For the dierential case the
voltage and charge (COSSQ) are doubled.
COSSQ =
VAMP
∙
∫
0
VAMP
COSS (v) ∙ dv
1
The Source Coil
Figure 3 shows the schematic for the source coil which is Class 3 A4WP
compliant. The matching network includes both series and shunt tuning.
The matching network series tuning is dierential to allow balanced
connection and voltage reduction for the capacitors.
The Device Board
Figure 4 shows the basic schematic for the device coil which is Category 3
A4WP compliant. The matching network includes both series and shunt
tuning.The matching network series tuning is dierential to allow balanced
connection and voltage reduction for the capacitors.
The device board comes equipped with a kelvin connected output DC
voltage measurement terminal and a built in shunt to measure the output
DC current.
Two LEDs have been provided to indicate that the board is receiving power
with an output voltage greater than 4 V (green LED) and that the board
output voltage limit has been reached (greater than 36 V using the red LED).
QUICK START PROCEDURE
The EPC9112 demonstration system is easy to set up and evaluate the
performance of the eGaN FET in a wireless power transfer application.
Refer to Figure 1 to assemble the system and Figures 5 and 7 for proper
connection and measurement setup before following the testing
procedures.
The EPC9507 can be operated using any one of two alternative methods:
a. Using the pre-regulator
b. Bypassing the pre-regulator
a. Operation using the pre-regulator
The pre-regulator is used to supply power to the amplier in this mode
and will limit the DC current to the amplier based on the setting. The
pre-regulator also monitors the temperature of the amplier and will limit
the current in the event the temperature exceeds 85°C.
1. Make sure the entire system is fully assembled prior to making electrical
connections and make sure jumper (JP60 is set to pre-regulator
– right 2 pins).
2. With power o, connect the main input power supply bus to +VIN
(J50). Note the polarity of the supply connector.
3. With power o, connect the control input power supply bus to +VDD
(J90). Note the polarity of the supply connector.
4. Select and connect an applicable load resistance to the device board.
5. Make sure all instrumentation is connected to the system.
6. Turn on the control supply – make sure the supply is between 7 V and
12 V (7.5 V is recommended).
7. Turn on the main supply voltage to the required value (it is
recommended to start at 8 V and do not exceed the absolute
maximum voltage of 32 V).
8. Once operation has been conrmed, adjust the main supply voltage
within the operating range and observe the output voltage,
eciency and other parameters on both the amplier and device
boards.
9. For shutdown, please follow steps in the reverse order. Start by reducing
the main supply voltage to 0 V followed by steps 6 through 2.
b. Operation bypassing the pre-regulator
In this mode, the pre-regulator is bypassed and the main power is
connected directly to the amplier. This allows the amplier to be
operated using an external regulator or to test at higher voltages.
In this mode there is no current or thermal protection for the eGaN FETs.
1. Make sure the entire system is fully assembled prior to making electri-
cal connections and remove the jumper JP60 and insert it into J51 to
place the EPC9507 amplier in bypass mode. Never connect the main
power positive (+) to J50 when operating in bypass mode.
2. With power o, connect the main input power supply ground to the
ground terminal of J50 (-) and the positive (+) to the center pin of JP60.
3. With power o, connect the control input power supply bus to +VDD
(J90). Note the polarity of the supply connector.
4. Select and connect an applicable load resistance to the device board.
5. Make sure all instrumentation is connected to the system.
6. Turn on the control supply – make sure the supply is between 7 V and
12 V range (7.5 V is recommended).
7. Turn on the main supply voltage to the required value (it is recom-
mended to start at 2 V and do not exceed the absolute maximum
voltage of 80 V).

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Demonstration System EPC9112
8. Once operation has been conrmed, adjust the main supply
voltage within the operating range and observe the output voltage,
eciency and other parameters on both the amplier and device
boards. See Pre-Cautions when operating in the bypass mode
9. For shutdown, please follow steps in the reverse order. Start by
reducing the main supply voltage to 0 V followed by steps 6 through 2.
NOTE.When measuring the high frequency content switch-node (Source Coil Voltage), care
must be taken to avoid long ground leads. An oscilloscope probe connection (preferred
method) has been built into the board to simplify the measurement of the Source Coil
Voltage (J2 and J3 as shown in Figure 3).
SWITCHING BETWEEN SINGLEENDED
AND DIFFERENTIAL MODE OPERATION
The ZVS class-D amplier can be operated in either single-ended or
dierential mode operation by changing the jumper setting of J75.
When inserted the amplier operates in the single-ended mode. Using
an external pull down with oating collector/ drain connection will have
the same eect. The external transistor must be capable of sinking 25 mA
and withstand at least 6 V.
THERMAL CONSIDERATIONS
The EPC9112 demonstration system showcases the EPC2007C and
EPC2038 eGaN FETs in a wireless energy transfer application. Although
the electrical performance surpasses that of traditional silicon devices,
their relatively smaller size does magnify the thermal management
requirements. The operator must observe the temperature of the gate
driver and eGaN FETs to ensure that both are operating within the
thermal limits as per the datasheets.
NOTE. The EPC9112 demonstration system has limited current and thermal protection
only when operating o the Pre-Regulator. When bypassing the pre-regulator there is no
current or thermal protection on board and care must be exercised not to over-current or
over-temperature the devices. Wide coil coupling and load range variations can lead to
increased losses in the devices.
Pre-Cautions
The EPC9112 demonstration system has no controller or enhanced
protections systems and therefore should be operated with caution.
Some specic precautions are:
1. Never operate the Source Coil within 6 inches in any direction of any
solid metal objects as this will shift the tuning of the coil. Please con-
tact EPC should the tuning of the coil be required to change to suit
specic conditions so that it can be correctly adjusted for use with the
ZVS class-D amplier.
2. There is no heat-sink on the devices and during experimental
evaluation it is possible present conditions to the amplier that may
cause the devices to overheat. Always check operating conditions and
monitor the temperature of the EPC devices using an IR camera.
VAMP
Q1 LZVS12
Q2
Q11
Q12
LZVS2
CZVS1 CZVS2
LZVS1
Coil
Connection
Single
Ended
Operation
Jumper
Pre-
Regulator
Pre-Regulator
Jumper
JP60
J50
VIN
Bypass Mode
Connection
Pre-
Regulation
Connection
Figure 2: Diagram of EPC9507 Amplier Board
Source Coil
Coil
Connection
Matching
Impedance
Network
Class 3
Coil
Un-Regulated
DC output
Matching
Impedance
Network
Cat. 3
Coil
Device Board
Figure 4: Basic Schematic of the A4WP Category 3 Device Board
Figure 3: Diagram of the A4WP Class 3 Source Coil

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Demonstration System EPC9112
Figure 5: Proper Connection and Measurement Setup for the Amplier Board
7 -12 VDC
Gate Drive and
Control Supply
(Note Polarity)
6 -36 VDC
VIN Supply
(Note Polarity)
Source Coil
Connection
Switch -Node Main
Oscilloscope Probe
Switch -Node
Secondary
Oscilloscope Probe
Ground Post
Amplier Voltage
Source Jumper
Disable Oscillator
Jumper
Disable Pre-Regulator
Jumper
Pre-Regulator
Current Setting
Pre-Regulator
Timing Setting
(Not Installed)
Amplier
Timing Setting
(Not Installed)
Oscillator Selection
External
Oscillator
Jumper
External / Internal
Pre -Regulator Jumper
Bypass Connection
Single Ended /
Dierential Mode
Operation Selector
Figure 6: Proper Connection for the Source Coil Figure 7: Proper Connection and Measurement Setup for the Device Board
Source Board
Connection
Matching with
trombone tuning
Standos for Mechanical
attachment to Source Coil
to these locations (x5)
Device Output
Voltage
(0 V – 38 Vmax)
A
V
mV
External Load
Connection
Matching
Device Output
Current
(300 m Shunt)
Output Voltage
> 5 V LED
Output Voltage
> 37 V LED
Half / Full Bridge
Mode Jumper
Load Current
(See Notes for details)
* ONLY to be used with
Shunt removed

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Demonstration System EPC9112
Figure 8 : Proper Measurement of the Switch Nodes Using the Hole and Ground Post
Do not use
probe ground
lead
Ground
probe
against
post
Place probe tip
in large via
Minimize
loop
Figure 9: ZVSTiming Diagrams
Shoot-
through
Q2 turn-on
Q1 turn-o
VAMP
0
time
ZVS
Partial
ZVS
ZVS + Diode
Conduction
Shoot-
through
Q1 turn-on
Q2 turn-o
VAMP
0 time
ZVS
Partial
ZVS
ZVS + Diode
Conduction

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Demonstration System EPC9112
Table 3: Bill of Materials - Amplier Board
Item Qty Reference Part Description ManµFacturer Part #
1 2 C1_1, C1_2 4.7 µF, 10 V Samsung CL05A475MP5NRNC
2 4 C2_1, C2_2, C4_1, C4_2 100 nF, 25 V Murata GRM155R71C104KA88D
3 2 C5_1, C5_2 DNP Murata GRM155R71C104KA88D
4 2 C3_1, C3_2 22 nF, 25 V TDK C1005X7R1E223K050BB
5 8 C11_1, C11_2, C12_1, C12_2,
C13_1, C13_2, C14_1, C14_2 10 nF, 100 V TDK C1005X7S2A103K050BB
6 7 C15_1, C15_2, C16_1, C16_2, C62,
C64, C65 2.2 µF 100 V Taiyo Yuden HMK325B7225KN-T
7 5 C42_1, C42_2, C43_1, C43_2, C75 22 pF, 50 V Kemet C0402C220J5GACTU
8 1 C50 1 µF, 50 V Taiyo Yuden UMK107AB7105KA-T
9 2 C52, C60 4.7 µF, 16 V TDK C1608X5R1C475K
10 2 C53, C54 2.2 nF, 50 V Yageo CC0402KRX7R9BB222
11 4 C55, C66, C67, C68 10 nF, 100 V TDK C1005X7S2A103K050BB
12 1 C56 1 nF, 50 V Yageo CC0402KRX7R9BB102
13 3 C57, C63, C70 100 nF, 25 V TDK C1005X7R1E104K050BB
14 6 C71, C72, C77, C78, C80, C81 100 nF, 25 V TDK C1608X7R1E104K
15 1 C73 22 pF, 25 V DNP DNP
16 2 C82, C83 100 pF, 25 V TDK C1608C0G1H101J080AA
17 1 C84 47 pF, 50 V Yageo CC0402JRNPO9BN470
18 3 C90, C91, C92 1 µF, 25 V TDK C1608X7R1E105K
19 2 Czvs1, Czvs2 1 µF, 50 V Taiyo Yuden C2012X7R1H105K125AB
20 2 D1_1, D1_2 40 V, 300 mA
ST
BAT54KFILM
21 10 D2_1, D2_2, D71, D72, D77, D78,
D82, D83 40 V, 30 mA
Diodes Inc. SDM03U40
22 2 D3_1, D3_2 DNP Diodes Inc. SDM03U40
23 2 D4_1, D4_2 5 V 1, 150 mW Bournes CD0603-Z5V1
24 3 GP1_1, GP1_2, J61 .1 Male Vert. Würth 61300111121
25 1 J1 SMA Board Edge Linx CONREVSMA013.062
26 1 J50 .156 Male Vert. Würth 645002114822
27 6 J51, J70, J71, J75, J90, JP70 .1 Male Vert. Würth 61300211121
28 1 JMP1 DNP
29 1 JP60 .1 Male Vert. Würth 61300311121
30 1 JP61 Jumper 100 Würth 60900213421
31 1 L60 10 µH Würth 744314101
32 2 Lzvs1, Lzvs2 DNP CoilCraft DNP
33 1 Lzvs12 500 nH CoilCraft 2929SQ-501JEB
34 6 P71, P72, P77, P78, P82, P83 DNP Murata PV37Y102C01B00
35 1 P49 DNP Murata PV37Y103C01B00
36 2 Q4_1, Q4_2 100 V, 2.8 Ω EPC EPC2038
37 6 Q10_1, Q10_2, Q11_1, Q11_2,
Q60, Q61 100 V, 6 A, 30 mW EPC EPC2007C
38 2 R2_1, R2_2 20 Ω Stackpole RMCF0402JT20R0
39 2 R3_1, R3_2 27k Ω Panasonic ERJ-2GEJ273X
40 2 R4_1, R4_2 4.7 Ω Stackpole RMCF0402FT4R70
41 4 R10_1, R10_2, R11_1, R11_2 2.2 Ω Yageo RC0402JR-072R2L
42 1 R47 6.04k Ω Panasonic ERJ-2RKF6041X
43 1 R48 2.74k Ω Panasonic ERJ-2RKF2741X
44 1 R49 3.3k Ω Panasonic ERJ-2RKF3301X
45 1 R50 40.2k Ω Yageo RC0402FR-0740K2L
46 1 R51 280k Ω Panasonic ERJ-2RKF2803X
47 1 R52 10k Ω Yageo RC0402FR-0710KL
48 1 R54 15k Ω Yageo RC0402JR-0715KL
49 3 R55, R56, R84 10 Ω Yageo RC0402FR-0710RL
50 1 R57 909k Ω Panasonic ERJ-3EKF9093V
51 1 R58 300k Ω Panasonic ERJ-2RKF3003X
52 1 R59 45.3k Ω Panasonic ERJ-2RKF4532X
53 2 R60, R61 2.2 Ω Yageo RC0402JR-072R2L
54 1 R62 24 mW, 1 Ω Susumu PRL1632-R024-F-T1
(continued on next page)

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Demonstration System EPC9112
Table 3: Bill of Materials - Amplier Board (continued)
Item Qty Reference Part Description Manufacturer Part #
EPC would like to acknowledge Würth Electronics (www.we-online.com/web/en/wuerth_elektronik/start.php) and KDS Daishinku America (www.kdsamerica.com) for their support of this project.
55 1 R70 47k Ω Stackpole RMCF0603JT47K0
56 2 R71, R78 390 Ω Stackpole RMCF0603FT390R
57 2 R72, R77 124 Ω Panasonic ERJ-3EKF1240V
58 1 R73 10k Ω Yageo RC0603JR-0710KL
59 1 R75 10k Ω Panasonic ERJ-2GEJ103X
60 1 R82 31.6 Ω Panasonic ERJ-3EKF31R6V
61 1 R83 191 Ω Panasonic ERJ-3EKF1910V
62 1 RT1 470k Ω @ 25°C Murata NCP15WM474E03RC
63 2 TP1, TP2 SMD Probe Loop Keystone 5015
64 3 U1_1, U1_2, U60 100 V eGaN Driver National Semiconductor LM5113TM
65 1 U50 Step Down Controller Linear LT3741EΜF#PBF
66 1 U70 Programmable Oscillator KDS Daishinku America DSO221SHF 6.780 / 1XSF006780EH
67 3 U71, U77, U81 2 In NAND Fairchild NC7SZ00L6X
68 3 U72, U78, U80 2 In AND Fairchild NC7SZ08L6X
69 1 U90 5.0 V, 250 mA DFN Microchip MCP1703T-5002E/MC
Table 4: Bill of Materials - Source Coil
Item Qty Reference Part Description Manufacturer Part #
1 1 Ctrombone 680 pF, 300 V Vishay VJ1111D681KXDAR
2 1 C1 DNP – –
3 1 C2 15 pF, 1500 V Vishay VJ1111D150JXRAJ
4 1 C3 560 pF, 300 V Vishay VJ1111D561KXDAR
5 1 PCB1 Class 3 Coil Former NuCurrent R26_RZTX_D1
6 2 C4, C6 0 Ω, 0612 Vishay RCL06120000Z0EA
7 1 C5 DNP – –
8 1 J1 SMA PCB Edge Linx CONREVSMA003.031
Table 5: Bill of Materials - Device Board
Item Qty Reference Part Description Manufacturer Part #
1 1 C84 100 nF, 50 V Murata GRM188R71H104KA93D
2 1 C85 10 µF, 50 V Murata GRM32DF51H106ZA01L
3 1 PCB1 Cat3PRU Coastal Circuits Cat3DeviceBoard
4 2 CM1, CM11 300 pF Vishay VJ1111D301KXLAT
5 4 CM2, CM12, CMP1, CMP2 DNP Vishay VJ1111D101JXRAT, VJ1111D560JXRAJ
6 3 CM5, CM7, CMP3 DNP Vishay VJ0505D101JXCAJ
7 2 CM6, CM8 56 pF Vishay VJ0505D560JXPAJ
8 1 CMP4 100 pF Vishay VJ0505D101JXCAJ
9 4 D80, D81, D82, D83 40 V, 1 A Diodes Inc. PD3S140-7
10 1 D84 LED 0603 Green Lite-On LTST-C193KGKT-5A
11 1 D85 2.7 V 250 mW NXP BZX84-C2V7,215
12 1 D86 LED 0603 Red Lite-On LTST-C193KRKT-5A
13 1 D87 33 V, 250 mW NXP BZX84-C33,215
14 2 J81, J82 .1" Male Vert. Würth 61300211121
15 2 LM1, LM11 82 nH Würth 744912182
16 1 R80 300 mΩ, 1 W Stackpole CSRN2512FKR300
17 1 R81 4.7k Ω Stackpole RMCF1206FT4K70
18 1 R82 422 Ω Yageo RMCF0603FT422R
19 4 TP1, TP2, TP3, TP4 SMD Probe Loop Keystone 5015
20 1 JPR1 Wire Jumper at CM11
– –

QUICK START GUIDE
10 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
Demonstration System EPC9112
OutA
SDM03U40
40 V, 30 mA
D71
100nF, 25 V
C72
5 V
5 V
100 nF, 25 V
C71
5 V
Deadtime Left
Deadtime Right
1k
P71
22 pF, 25 V
C73
A
B
U71
NC7SZ00L6X
A
B
Y
U72
NC7SZ08L6X
5 V
390 Ω
1 2
R71
DSO221SHF 6.780
42
GND
OUT 3 OE
1VCC
U70
100nF, 25 V
C70
5 V
5 V
Oscillator
IntOsc
5 V
5 V
.1" Male Vert.
1
2
J90
7.5 VDC - 12 VDC
Logic Supply Regulator
V7IN
1 µF, 25 V
C90
1 µF, 25 V
C91
V7
IN
5.0 V, 250 mA DFN
OUT
G N D
IN
G N D
U90
MCP1703T-5002E/MC
1 µF, 25 V
C92
Logic Supply
OutB
47k
1
2
R70
OSC
OSC
OSC
.1" Male Vert.
1
2
J70
Oscillator Disable
ZVS Tank Circuit
1
2
.156" Male Vert.
J50
VIN
Main Supply
.1" Male Vert.
1
2 3
JP60
VAMP
VIN VOUT
SMA Board Edge
J1
DNP
JMP1
Single Ended Operation Only
Vin
5 V Vout
GND
T e m p
V7in
PreRegulator
V
IN
5 V VOUT
1
2
470k @ 25°C
t°
RT1
Temp
Temp
OSCIntOsc
.1" Male Vert.
1
2
J71
External Oscillator
Internal / External Oscillator
Pre-Regulator
Pre-Regulator Bypass
SMD probe loop
1
TP1
SMD probe loop
1
TP2
VAMP
6 V ~ 36 V, 2 A max
VAMP
5 V
G N D
LIN
OUTHIN
1
100 nF, 25 V
C87
5 V
5 V
100 nF, 25 V
C77
5 V
Deadtime Left
Deadtime Right
A
B
U77
NC7SZ00L6X
A
B
Y
U78
NC7SZ08L6X
5 V
OSC
OSC
1 µF, 50 V
Czvs1
Lzvs1
EMPTY
Lzvs2
EMPTY
500 nH
Lzvs12
1 µF, 50 V
Czvs2
FD1
Local Fiducials
FD2 FD3
SDM03U40
40 V, 30 mA
D72
1k
P72
124
Ω
1 2
R72
SDM03U40
40 V, 30 mA
D77
1k
P77
124
Ω
1 2
R77
SDM03U40
40 V, 30 mA
D78
1k
P78
390
Ω
1 2
R78
VAMP
5 V
G N D
LIN
OUTHIN
2
EPC9507_SE_ZVSclassD_Rev3_ 0.SchDoc
EPC9507_SE_ZVSclassD_Rev3_0.SchDoc
EPC9507PR_Rev3_S0.SchDoc
10k
1
2
R73
OSC
VAMP
H Sig1
L Sig1
H Sig2
L Sig2
H Sig1
L Sig1
H Sig2
L Sig2
5 V
5 V
OSC
.1" Male Vert.
1
2
JP70
V7IN
.1" Male Vert.
1
2
J75
Single / Dierential Mode
nSD
nSD
nSD
5 V
22 pF, 25 V
C75
10k
1
2
R75
Jumper 100
JP61
VAMP
Figure 10: EPC9507 -ZVS Class D Amplier Schematic
Rev 3.0
5 VHS
5 VHS
5 V
GLH
Gate Driver
U1
LM5113TM
GLL
D1
BAT54KFILM
100 nF, 25 V
100 nF, 25 V
C2
5 V
4.7 V
4.7 V
GLH
20 Ω
12
R2
SDM03U40
D3
EMPTY
Synchronous Bootstrap Power Supply
C5
EMPTY
4.7 µF, 10 V
C1
D4
CD0603-Z5 V1
Gbtst
27k
12
R3
D2
SDM03U40
22 nF, 25 V
C3
GND
5 V
OUT
100 nF, 25 V
C4
2.2 Ω
1 2
R10
Out
Q10
EPC2007C
Q11
EPC2007C
2.2 Ω
1 2
R11
GLH GLL
2.2 µF, 100 V
C1510 nF, 100 V
C11 C12
C13 C14
2.2 µF, 100 V
C16
C42
C43
100 V, 2.8 Ω
Q4
EPC2038
4.7 Ω
1 2
R4
VAMP
GND
LIN
HIN
HIN
LIN
HIN
LIN
1
ProbeHole
PH1
Ground Post
1
.1" Male Vert.
GP1
VAMP
VAMPVAMPVAMP
VAMP VAMP VAMP
Out
GUH
GUL
GUH GUL
OUT
10 nF, 100 V
10 nF, 100 V 10 nF, 100 V
22 pF, 50 V
22 pF, 50 V

QUICK START GUIDE
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017 | | 11
Demonstration System EPC9112
Figure 11: EPC9507 Pre-Regulator Schematic
10
5
G N D
4
UVLO
Osc
3 6
G N D
21
1.5 V
1.2 V
Cnt
20
19 18 17
Sync Rt Cnt1 SS
16 15 8 9 7
EN/UVLO VREF VC Cnt2
12 13
2 1
G N D
11
G N D
14
U50 LT3741EUF#PBF
1 µF, 50 V C50
10k
12
R52 280k
1
2
R51
40.2k
1 2
R50 HG
LG
4.7 µF, 16 V C52
V7IN
V7IN
Vccint
Sns+
VOUT
Vfdbk
15k
1 2
R54
2.2 nF, 50 V
C53
2.2 nF, 50 V
C54
.1" Male Vert.
1 2
J51
PreRegulator Disable
PreDis
PreDis
VOUT
10 Ω
1 2
R55
10 Ω
1 2
R56
1 nF, 50 V
C56
VIN
VOUT
GUPH GUPL
5 V 5 VUP
4.7 µF, 16 V C60
5 VUP 5 V GLPH GLPL
Gate Driver
U60 LM5113TM
HGPR LGPR
2.2 Ω
1 2
R61
2.2 Ω
1 2
R60
GUPH GUPL
GLPLGLPH
Q61
EPC2007C
Q60
EPC2007C
VIN
100 nF, 25 V C63
SW
Sns+
1 2
24.1 mΩ
R62
SW
SW
VIN VIN
10 nF, 100 V C66
10 nF, 100 V
C67
VIN VIN
10 nF, 100 V C68
VIN
5 V
VOUT
GND
Buer
SDM03U40
D82
D83 SDM03U40
100 nF, 25 V C81
5 V
5 V
100 nF, 25 V C80
5 V
10E
1 2
R84
Deadtime Lower
Deadtime Upper
1k
P83
1k
P82
47 pF, 50 V
C84
A B
U81 NC7SZ00L6X
A B
Y
U80 NC7SZ08L6X
5 V
191 Ω
1 2
R83
31.6 Ω
1 2
R82
PWM
HG
PWM
Pre-Regulator for ZVS Class D Wireless Power Transfer Source
HGPR
LGPR
Buer
300k
1
2
R58 909k
1
2
R57 VIN
VREF
3.3k
1
2
R49
VREF
100 nF, 25 V C57
10 k
P49
Current Set
Temp
45.3k
1
2
R59
VREF
10 nF, 100 V
C55
100 pF, 25 V
C82
100 pF, 25 V
C83
2.74k
1
2
R48 6.04k
1
2
R47
1
.1" Male Vert.
J61
1
ProbeHole J62
Ground Post
2.2 µF, 100 V C64 2.2 µF, 100 V C65
2.2 µF, 100 V C62
10CH
L60
V7IN
PWM

QUICK START GUIDE
12 | | EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2017
Demonstration System EPC9112
Figure 12: Class 3 Source Board Schematic
Figure 13: Category 3 Device Board Schematic
SMA PCB
Edge
J1
Coil Matching
C2
15 pF 1111
Ctrombone
Adjust on trombone C6
0 Ω 0612
C4
0 Ω 0612
C5
DNP
Amplier
Connection
680 pF 1111
560 pF 1111
C3
DNP
C1
Cls3PTU
PCB1
40 V, 1 A
D80
40 V, 1A
D82
40 V, 1 A
D81
40 V, 1 A
D83
10 µF, 50 V
C85
VRECT
100 nF, 50V
C84
VRECT VRECT VOUT
VOUT
1 2
300 mΩ,1W
R80
.1" Male Vert.
1 2
J81
RX Coil
SMD probe loop
1
TP1
SMD probe loop
1
TP2
Kelvin Output Current
SMD probe loop
1
TP3
SMD probe loop
1
TP4
VOUT
.1" Male Vert.
1
2
J82
Output
Cat3PRU
Cl1
DNP
CMP1
CM1
300 pF
300 pF
CM 11
CM 2
DNP
DNP
CM 12
DNP
CMP2
Kelvin Output Voltage
Shunt Bypass
LM 1
LM 11
82 nH
82 nH
Matching
CMP3
DNPCM P4
100 pF
CM 5
DNP
CM 6
56 pF
CM 7
DNP
CM 8
56 pF
4.7k
12
R81
Receive Indicator Over-Voltage Indicator
422 Ω
12
R82
LED 0603
Green
D84
LED 0603 Red
D86
VOUT > 4 V VOUT > 36 V
2.7 V, 250 mW 250 mW
D85
33 V,
D87

Demonstration Board Warning and Disclaimer
The EPC9112 board is intended for product evaluation purposes only and is not intended for commercial use. 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 certied 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. Ecient Power Conversion
Corporation (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 rightat any time, without notice, to makechanges to anyproducts described hereinto improve reliability, function, or design.EPC does not assumeany 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
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