Demonstration
System EPC9112
Quick Start Guide
6.78 MHz, ZVS Class-D Wireless Power System
using EPC2007C / EPC2038
QUICK START GUIDE
Demonstration System EPC9112
DESCRIPTION
The EPC9112 wireless power demonstration system is a high efficiency,
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 Amplifier) EPC9507
2) A Class 3 A4WP compliant Source Coil (Transmit Coil)
3) A Category 3 A4WP compliant Device Coil with rectifier and DC
smoothing capacitor.
The amplifier board features the EPC2007C and EPC2038 enhancement
mode field effect transistors (FET) in an optional half-bridge topology
(single ended configuration) or default full-bridge topology (differential
configuration), and includes the gate driver/s and oscillator that ensures
operation of the system at 6.78 MHz. This revision of the wireless
demonstration amplifier includes a synchronous bootstrap FET supply
for the upper FETs of the ZVS class-D amplifier 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 specifically designed for this function. To learn more
about the synchronous bootstrap supply please refer to the following [1,
2, 3]. The EPC9507 amplifier 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 Differential mode by
changing a jumper setting. This allows for high efficiency operation with
load impedance ranges that allow for single ended operation.
Finally, the timing adjust circuits for the ZVS class-D amplifiers have
been separated to further ensure highest possible efficiency setting and
includes separate ZVS tank circuits.
The amplifier board is equipped with a pre-regulator that limits the DC
current of the supply to the amplifier. As the amplifier 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 amplifier that will ensure a
safe operating point. The pre-regulator also monitors the temperature
of the main amplifier 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 simplified diagram of the amplifier board is
given in Figure 1.
The Source and Device Coils are Alliance for Wireless Power (A4WP) compliant
and have been pre-tuned to operate at 6.78 MHz with the EPC9507 amplifier.
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 rectifier and output filter to deliver a filtered 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 datasheet
should be read in conjunction with this quick start guide.
The Source coil used in this wireless power transfer demo system is provided 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.
Table 1: Performance Summary (TA = 25 °C) EPC9507
Symbol
Min
Max
Units
Control Supply Input Range
7
12
V
8
36
V
VIN
Bus Input Voltage Range –
Pre-Regulator Mode
Bus Input Voltage Range –
Bypass Mode
0
80
V
VOUT
Switch Node Output Voltage
V
IOUT
Vextosc
Switch Node Output Current (ea.)
External Oscillator Input Threshold
Input ‘Low’
-0.3
VIN 2V
6*
0.8
A
V
Input ‘High’
2.4
5
V
VDD
[1] Wireless Power Handbook
VIN
[2] Performance Comparison for A4WP Class-3
Wireless Power Compliance between
eGaN FET and MOSFET in a ZVS class-D Amplifier
[3] EPC2038 datasheet
Parameter
Conditions
Pre-regulator Disable
Voltage Range
80 mm
Device Board
Table 2: Performance Summary (TA = 25 °C) Category 3 Device Board
Symbol
50 mm
64 mm
Source Coil
220 mm
45 mm
Amplifier Board
Open drain/ -0.3
VPre_Disable
5.5
V
collector
Open Drain/ -1
IPre_Disable
Pre-regulator Disable Current
1
mA
Collector
Oscillator Disable
Open Drain/
VOsc_Disable
-0.3
5
V
Voltage Range
Collector
Oscillator Disable
Open Drain/ -25
IOsc_Disable
25
mA
Current
Collector
* Assumes inductive load, maximum current depends on die temperature – actual maximum current with be subject to
switching frequency, bus voltage and thermals.
Figure 1: EPC9112
Demonstration System
1
168 mm
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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QUICK START GUIDE
Demonstration System EPC9112
MECHANICAL ASSEMBLY
ZVS Timing Adjustment
The assembly of the EPC9112 Wireless Demonstration kit is simple and
shown in Figure 1. The source coil and amplifier have been equipped with
reverse polarity SMA connectors. The source coil is simply connected to
the amplifier.
Setting the correct time to establish ZVS transitions is critical to achieving
high efficiency with the EPC9507 amplifier. 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 fixed resistor values. The procedure is the same for
both single ended and differential mode of operation (as applicable per
operating mode). The timing MUST initially be set WITHOUT the source coil
connected to the amplifier. 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 device board does not need to be mechanically attached to the
source coil.
DESCRIPTION
The Amplifier Board (EPC9507)
Figure 1 shows a diagram of the EPC9507 ZVS class-D amplifier with preregulator. The pre-regulator is set to a specified 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 amplifier 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 amplifier 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 amplifier 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 amplifier (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 amplifier can be configured 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 configuration 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 efficiency (see section on ZVS timing
adjustment).
The steps are:
1. Remove the jumper in JP60 and insert it into J51 to place the EPC9507
amplifier in bypass mode. With power off 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 off, 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 7 V 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 figure 4.
Repeat for the falling edge of the waveform by adjusting P72 or P78.
Repeat for the other eGaN FET pair if using differential 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 fixed value resistors. Configure the
EPC9507 amplifier 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 off. The capacitance CZVS is chosen to have a very small
ripple voltage component and is typically around 1 µF. The amplifier supply
voltage, switch-node transition time will determine the value of inductance
for LZVSx which needs to be sufficient 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:
LZVS =
∆tvt
(1)
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 amplifier 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:
COSSQ =
1
VAMP
∙
∫
VAMP
0
COSS (v) ∙ dv
(2)
To add additional immunity margin for shifts in coil impedance, the
value of LZVS can be decreased to increase the current at turn off
of the devices (which will increase device losses). Typical voltage
transition times range from 2 ns through 12 ns. For the differential case the
voltage and charge (COSSQ) are doubled.
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 differential 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 differential 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.
8. Once operation has been confirmed, adjust the main supply voltage
within the operating range and observe the output voltage,
efficiency and other parameters on both the amplifier and device
boards.
The EPC9507 can be operated using any one of two alternative methods:
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.
a. Using the pre-regulator
b. Operation bypassing the pre-regulator
b. Bypassing the pre-regulator
In this mode, the pre-regulator is bypassed and the main power is
connected directly to the amplifier. This allows the amplifier to be
operated using an external regulator or to test at higher voltages.
a. Operation using the pre-regulator
The pre-regulator is used to supply power to the amplifier in this mode
and will limit the DC current to the amplifier based on the setting. The
pre-regulator also monitors the temperature of the amplifier 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 off, connect the main input power supply bus to +VIN
(J50). Note the polarity of the supply connector.
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 electrical connections and remove the jumper JP60 and insert it into J51 to
place the EPC9507 amplifier in bypass mode. Never connect the main
power positive (+) to J50 when operating in bypass mode.
2. With power off, 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 off, connect the control input power supply bus to +VDD
(J90). Note the polarity of the supply connector.
3. With power off, 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.
4. Select and connect an applicable load resistance to the device board.
5. Make sure all instrumentation is connected to the system.
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).
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).
7. Turn on the main supply voltage to the required value (it is recommended 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 confirmed, adjust the main supply
voltage within the operating range and observe the output voltage,
efficiency and other parameters on both the amplifier and device
boards. See Pre-Cautions when operating in the bypass mode
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.
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. The EPC9112 demonstration system has limited current and thermal protection
only when operating off 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.
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 amplifier can be operated in either single-ended or
differential mode operation by changing the jumper setting of J75.
When inserted the amplifier operates in the single-ended mode. Using
an external pull down with floating collector/ drain connection will have
the same effect. 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,
Bypass Mode
Connection
Pre-Cautions
The EPC9112 demonstration system has no controller or enhanced
protections systems and therefore should be operated with caution.
Some specific 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 contact EPC should the tuning of the coil be required to change to suit
specific conditions so that it can be correctly adjusted for use with the
ZVS class-D amplifier.
2. There is no heat-sink on the devices and during experimental
evaluation it is possible present conditions to the amplifier that may
cause the devices to overheat. Always check operating conditions and
monitor the temperature of the EPC devices using an IR camera.
Pre-Regulator
Jumper
VAMP
JP60
PreRegulator
Coil
Connection
L ZVS12
Q1
VIN
Q 11
L ZVS2
L ZVS1
Q2
J50
C ZVS1
PreRegulation
Connection
C ZVS2
Single
Ended
Operation
Jumper
Q 12
Figure 2: Diagram of EPC9507 Amplifier Board
Matching
Impedance
Network
Matching
Impedance
Network
Coil
Connection
Class 3
Coil
Un-Regulated
DC output
Cat. 3
Coil
Device Board
Source Coil
Figure 3: Diagram of the A4WP Class 3 Source Coil
Figure 4: Basic Schematic of the A4WP Category 3 Device Board
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Demonstration System EPC9112
7 -12 VDC
Gate Drive and
Control Supply
(Note Polarity)
6 -36 VDC
V IN Supply
(Note Polarity)
Amplifier Voltage
Source Jumper
Bypass Connection
Pre -Regulator Jumper
Switch -Node Main
Oscilloscope Probe
Pre-Regulator
Timing Setting
(Not Installed)
Source Coil
Connection
Amplifier
Timing Setting
(Not Installed)
Ground Post
Switch -Node
Secondary
Oscilloscope Probe
Pre-Regulator
Current Setting
Disable Oscillator
Jumper
Disable Pre-Regulator
Jumper
Single Ended /
Differential Mode
Operation Selector
Oscillator Selection
Jumper
External / Internal
External
Oscillator
Figure 5: Proper Connection and Measurement Setup for the Amplifier Board
Source Board
Connection
Matching with
trombone tuning
External Load
Connection
Output Voltage
> 5 V LED
Output Voltage
> 37 V LED
Standoffs for Mechanical
attachment to Source Coil
to these locations (x5)
Device Output
mV
Current
(300 m Shunt)
Device Output
Voltage
(0 V – 38 Vmax)
V
A
Load Current
(See Notes for details)
* ONLY to be used with
Shunt removed
Matching
Half / Full Bridge
Mode Jumper
Figure 6: Proper Connection for the Source Coil
Figure 7: Proper Connection and Measurement Setup for the Device Board
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Demonstration System EPC9112
Do not use
probe ground
lead
Ground
probe
against
post
Place probe tip
in large via
Minimize
loop
Figure 8 : Proper Measurement of the Switch Nodes Using the Hole and Ground Post
Q1 turn-off
Q2 turn-off
VAMP
VAMP
Q2 turn-on
0
Partial
Shoot- ZVS
through
Q1 turn-on
time
ZVS
0
Partial
Shoot- ZVS
through
ZVS + Diode
Conduction
time
ZVS
ZVS + Diode
Conduction
Figure 9: ZVS Timing Diagrams
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Demonstration System EPC9112
Table 3: Bill of Materials - Amplifier Board
Item
Qty
Reference
Part Description
Manufacturer
Part Number
1
2
C1_1, C1_2
4.7 µF, 10 V
Samsung
CL05A475MP5NRNC
2
3
4
4
2
2
100 nF, 25 V
DNP
22 nF, 25 V
Murata
Murata
TDK
GRM155R71C104KA88D
GRM155R71C104KA88D
C1005X7R1E223K050BB
5
8
10 nF, 100 V
TDK
C1005X7S2A103K050BB
6
7
2.2 µF 100 V
Taiyo Yuden
HMK325B7225KN-T
7
8
9
10
11
12
13
14
15
16
17
18
19
20
5
1
2
2
4
1
3
6
1
2
1
3
2
2
C2_1, C2_2, C4_1, C4_2
C5_1, C5_2
C3_1, C3_2
C11_1, C11_2, C12_1, C12_2,
C13_1, C13_2, C14_1, C14_2
C15_1, C15_2, C16_1, C16_2, C62,
C64, C65
C42_1, C42_2, C43_1, C43_2, C75
C50
C52, C60
C53, C54
C55, C66, C67, C68
C56
C57, C63, C70
C71, C72, C77, C78, C80, C81
C73
C82, C83
C84
C90, C91, C92
Czvs1, Czvs2
D1_1, D1_2
D2_1, D2_2, D71, D72, D77, D78,
D82, D83
D3_1, D3_2
D4_1, D4_2
GP1_1, GP1_2, J61
J1
J50
J51, J70, J71, J75, J90, JP70
JMP1
JP60
JP61
L60
Lzvs1, Lzvs2
Lzvs12
P71, P72, P77, P78, P82, P83
P49
Q4_1, Q4_2
Q10_1, Q10_2, Q11_1, Q11_2,
Q60, Q61
R2_1, R2_2
R3_1, R3_2
R4_1, R4_2
R10_1, R10_2, R11_1, R11_2
R47
R48
R49
R50
R51
R52
R54
R55, R56, R84
R57
R58
R59
R60, R61
R62
22 pF, 50 V
1 µF, 50 V
4.7 µF, 16 V
2.2 nF, 50 V
10 nF, 100 V
1 nF, 50 V
100 nF, 25 V
100 nF, 25 V
22 pF, 25 V
100 pF, 25 V
47 pF, 50 V
1 µF, 25 V
1 µF, 50 V
40 V, 300 mA
Kemet
Taiyo Yuden
TDK
Yageo
TDK
Yageo
TDK
TDK
DNP
TDK
Yageo
TDK
Taiyo Yuden
ST
C0402C220J5GACTU
UMK107AB7105KA-T
C1608X5R1C475K
CC0402KRX7R9BB222
C1005X7S2A103K050BB
CC0402KRX7R9BB102
C1005X7R1E104K050BB
C1608X7R1E104K
DNP
C1608C0G1H101J080AA
CC0402JRNPO9BN470
C1608X7R1E105K
C2012X7R1H105K125AB
BAT54KFILM
21
10
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
2
2
3
1
1
6
1
1
1
1
2
1
6
1
2
37
6
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
2
2
2
4
1
1
1
1
1
1
1
3
1
1
1
2
1
40 V, 30 mA
Diodes Inc.
SDM03U40
DNP
5 V 1, 150 mW
.1 Male Vert.
SMA Board Edge
.156 Male Vert.
.1 Male Vert.
DNP
.1 Male Vert.
Jumper 100
10 µH
DNP
500 nH
DNP
DNP
100 V, 2.8 Ω
Diodes Inc.
Bournes
Würth
Linx
Würth
Würth
SDM03U40
CD0603-Z5V1
61300111121
CONREVSMA013.062
645002114822
61300211121
Würth
Würth
Würth
CoilCraft
CoilCraft
Murata
Murata
EPC
61300311121
60900213421
744314101
DNP
2929SQ-501JEB
PV37Y102C01B00
PV37Y103C01B00
EPC2038
100 V, 6 A, 30 mW
EPC
EPC2007C
20 Ω
27 k Ω
4.7 Ω
2.2 Ω
6.04 k Ω
2.74 k Ω
3.3 k Ω
40.2k Ω
280 k Ω
10 k Ω
15 k Ω
10 Ω
909 k Ω
300 k Ω
45.3 k Ω
2.2 Ω
24 mW, 1 Ω
Stackpole
Panasonic
Stackpole
Yageo
Panasonic
Panasonic
Panasonic
Yageo
Panasonic
Yageo
Yageo
Yageo
Panasonic
Panasonic
Panasonic
Yageo
Susumu
RMCF0402JT20R0
ERJ-2GEJ273X
RMCF0402FT4R70
RC0402JR-072R2L
ERJ-2RKF6041X
ERJ-2RKF2741X
ERJ-2RKF3301X
RC0402FR-0740K2L
ERJ-2RKF2803X
RC0402FR-0710KL
RC0402JR-0715KL
RC0402FR-0710RL
ERJ-3EKF9093V
ERJ-2RKF3003X
ERJ-2RKF4532X
RC0402JR-072R2L
PRL1632-R024-F-T1
(continued on next page)
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2021 |
| 8
QUICK START GUIDE
Demonstration System EPC9112
Table 3: Bill of Materials - Amplifier Board (continued)
Item
Qty
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
1
2
2
1
1
1
1
1
2
3
1
1
3
3
1
Reference
Part Description
Manufacturer
Part Number
R70
R71, R78
R72, R77
R73
R75
R82
R83
RT1
TP1, TP2
U1_1, U1_2, U60
U50
U70
U71, U77, U81
U72, U78, U80
U90
47 k Ω
390 Ω
124 Ω
10 k Ω
10 k Ω
31.6 Ω
191 Ω
470 k Ω @ 25°C
SMD Probe Loop
100 V eGaN Driver
Step Down Controller
Programmable Oscillator
2 In NAND
2 In AND
5.0 V, 250 mA DFN
Stackpole
Stackpole
Panasonic
Yageo
Panasonic
Panasonic
Panasonic
Murata
Keystone
National Semiconductor
Linear
KDS Daishinku America
Fairchild
Fairchild
Microchip
RMCF0603JT47K0
RMCF0603FT390R
ERJ-3EKF1240V
RC0603JR-0710KL
ERJ-2GEJ103X
ERJ-3EKF31R6V
ERJ-3EKF1910V
NCP15WM474E03RC
5015
LM5113TM
LT3741EΜF#PBF
DSO221SHF 6.780 / 1XSF006780EH
NC7SZ00L6X
NC7SZ08L6X
MCP1703T-5002E/MC
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.
Table 4: Bill of Materials - Source Coil
Item
Qty
Reference
Part Description
Manufacturer
Part Number
1
2
3
4
5
6
7
8
1
1
1
1
1
2
1
1
Ctrombone
C1
C2
C3
PCB1
C4, C6
C5
J1
680 pF, 300 V
DNP
15 pF, 1500 V
560 pF, 300 V
Class 3 Coil Former
0 Ω, 0612
DNP
SMA PCB Edge
Vishay
–
Vishay
Vishay
NuCurrent
Vishay
–
Linx
VJ1111D681KXDAR
–
VJ1111D150JXRAJ
VJ1111D561KXDAR
R26_RZTX_D1
RCL06120000Z0EA
–
CONREVSMA003.031
Table 5: Bill of Materials - Device Board
Item
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
1
1
2
4
3
2
1
4
1
1
1
1
2
2
1
1
1
4
1
Reference
Part Description
Manufacturer
Part Number
C84
C85
PCB1
CM1, CM11
CM2, CM12, CMP1, CMP2
CM5, CM7, CMP3
CM6, CM8
CMP4
D80, D81, D82, D83
D84
D85
D86
D87
J81, J82
LM1, LM11
R80
R81
R82
TP1, TP2, TP3, TP4
JPR1
100 nF, 50 V
10 µF, 50 V
Cat3PRU
300 pF
DNP
DNP
56 pF
100 pF
40 V, 1 A
LED 0603 Green
2.7 V 250 mW
LED 0603 Red
33 V, 250 mW
.1" Male Vert.
82 nH
300 mΩ, 1 W
4.7k Ω
422 Ω
SMD Probe Loop
Wire Jumper at CM11
Murata
Murata
Coastal Circuits
Vishay
Vishay
Vishay
Vishay
Vishay
Diodes Inc.
Lite-On
NXP
Lite-On
NXP
Würth
Würth
Stackpole
Stackpole
Yageo
Keystone
GRM188R71H104KA93D
GRM32DF51H106ZA01L
Cat3DeviceBoard
VJ1111D301KXLAT
VJ1111D101JXRAT, VJ1111D560JXRAJ
VJ0505D101JXCAJ
VJ0505D560JXPAJ
VJ0505D101JXCAJ
PD3S140-7
LTST-C193KGKT-5A
BZX84-C2V7,215
LTST-C193KRKT-5A
BZX84-C33,215
61300211121
744912182
CSRN2512FKR300
RMCF1206FT4K70
RMCF0603FT422R
5015
–
–
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2021 |
| 9
OSC
A
R71
JP60
.1" Male Vert.
J50
.156" Male Vert.
2
390 Ω
Deadtime Right
P71
VIN
1
2
H Sig1
3
2
1
1
U71
NC7SZ00L6X
VIN
VOUT
B
5V
C71
100 nF, 25 V
1
C73
22 pF, 25 V
2
U72
NC7SZ08L6X
OSC
A
2
124 Ω
5V
Deadtime Left
P72
Y
B
R72
5V
5V
L Sig1
1
2
1
VCC
OUT
GND
D72
40 V, 30 mA
SDM03U40
1
EPC9507_SE_ZVSclassD_Rev3_0.SchDoc
1
5V
VAMP
HIN
OUT
IntOsc
J71
OSC
OSC
1
2
L Sig1
.1" Male Vert.
Internal / External Oscillator
C70
100 nF, 25 V
TP2
1
VAMP
SMD probe loop
LIN
External Oscillator
OutA
Lzvs1
EMPTY
Oscillator Disable
Temp
A
OSC
.1" Male Vert.
GND
IN
P77
1
U78
NC7SZ08L6X
5V
C91
1 µF, 25 V
C92
1 µF, 25 V
OSC
A
nSD
B
5V
FD2
Local Fiducials
Y
R78
t°
5V
VAMP
HIN
OUT
VAMP
Lzvs2
EMPTY
Czvs2
1 µF, 50 V
ZVS Tank Circuit
H Sig2
2
OutB
390 Ω
Deadtime Left
P78
H Sig2
L Sig2
LIN
D78
40 V, 30 mA
SDM03U40
FD3
Figure 10: Differential ZVS Class D Wireless Power Source Board using EPC2014C
| 10
Demonstration System EPC9112
FD1
5V
1k
C87
100 nF, 25 V
Logic Supply Regulator
2
EPC9507_SE_ZVSclassD_Rev3_ 0.SchDoc
D77
40 V, 30 mA
SDM03U40
5V
OUT
Single Ended Operation Only
L Sig2
1k
C77
100 nF, 25 V
U90
5.0 V, 250 mA DFN
MCP1703T-5002E/MC
C90
1 µF, 25 V
Deadtime Right
RT1
470 k @ 25°C
B
Single / Differential Mode
1
2
124 Ω
5V
.1" Male Vert.
2
GND
1
2
C75
22 pF, 25 V
J90
nSD
J75
nSD
U77
NC7SZ00L6X
R77
2
1
1
2
Logic Supply
7.5 VDC - 12 VDC
Lzvs12
500 nH
1
5V
R75
10 k
JMP1
DNP
Czvs1
1 µF, 50 V
Oscillator
5V
VAMP
SMD probe loop
J1
SMA Board Edge
H Sig1
5V
2
.1" Male Vert.
IntOsc
3
TP1
Pre-Regulator
1
2
4
U70
DSO221SHF 6.780
OE
VOUT
GND
2
J70
VIN
JP70
.1" Male Vert.
1
5V
Vout
PreRegulator
EPC9507PR_Rev3_S0.SchDoc
5V
R70
47 k
Vin
GND
1k
C72
100nF, 25 V
5V
Jumper 100
Temp
T em p
1
5V
R73
10k
Pre-Regulator Bypass
JP61
D71
40 V, 30 mA
SDM03U40
OSC
OSC
VAMP
Main Supply
6 V ~ 36 V, 2 A max
1k
QUICK START GUIDE
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2021 |
5V
QUICK START GUIDE
Demonstration System EPC9112
Q4
EPC2038
100 V, 2.8 Ω
5V
5V
1
R4
5 VHS
2
4.7 Ω
C2
100 nF, 25 V
D4
CD0603-Z5 V1
C4
100 nF, 25 V
Gbtst
OUT
D3
EMPTY
SDM03U40
Synchronous Bootstrap Power Supply
1
4.7 V
C5
EMPTY
100 nF, 25 V
R3
27k
VAMP
VAMP
2
C3
22 nF, 25 V
VAMP
C12
10 nF, 100 V
C15
2.2 µF, 100 V
1
C11
10 nF, 100 V
VAMP
D2
SDM03U40
R2
20 Ω
2
VAMP
GLH
VAMP
C13
10 nF, 100 V
VAMP
C14
10 nF, 100 V
C16
2.2 µF, 100 V
VAMP
U1
LM5113TM
5 VHS
GUH
GUH
GUL
HIN
HIN
HIN
C42
22 pF, 50 V
LIN
LIN
C43
22 pF, 50 V
2
Q10
EPC2007C
GLH
1
Out
1
5V
C1
4.7 µF, 10 V
GUL
PH1
4.7 V
GLH
GLL
R10
2.2 Ω
D1
BAT54KFILM
Out
LIN
1
OUT
ProbeHole
R11
2.2 Ω
2
GLL
Q11
EPC2007C
Gate Driver
GP1
GND
1
GND
.1" Male Vert.
Ground Post
Figure 11: Single Ended, High Efficiency ZVS Class D
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| 11
QUICK START GUIDE
R82
1
U80
NC7SZ08L6X
PWM
A
1
PreDis
C82
100 pF, 25 V
R58
300k
2
VIN
VIN
4
R47
6.04k
C52
4.7 µF, 16 V
HG
18
LG
GND
1
R84
2
PWM
1
9
1
R55 10 Ω
R56 10 Ω
2 Sns+
2
Vfdbk
Current Set
2
R59
45.3k
Temp
GLPH
GLPL
LGPR
2
GUPL
SW
1
1
R60
2.2 Ω
2
C56
1 nF, 50 V
R52
10k
1
A
C68
10 nF, 100 V
1
L60
10CH
GLPL
R62
2
24.1 mΩ
Sns+
VIN
VOUT
VOUT
C62
2.2 µF, 100 V
VIN
C66
10 nF, 100 V
C67
10 nF, 100 V
Gate Driver
5V
PWM
VIN
Q61
EPC2007C
ProbeHole
GLPH
VIN
C64
2.2 µF, 100 V
Q60
EPC2007C
U81
NC7SZ00L6X
R83
J61
2
GND
191 Ω
Deadtime Lower
P83
1
.1" Male Vert.
LGPR
Ground Post
B
1
VREF
R61
2.2 Ω
J62
5V
R51
280k
VOUT
1
SW
HGPR
C84
47 pF, 50 V
VOUT
GUPH
GUPH
GUPL
10E
8
1.2 V
HG
5 VUP
1
17
15
16
7
SS
Cnt2
GND
2
1
C55
10 nF, 100 V
Cnt1
1.5 V
6
3
P49
Cnt
Vccint
VIN
VIN
SW
U60
LM5113TM
2
C57
100 nF, 25 V
C63
100 nF, 25 V
1
VC
Osc
21
1
1
R48
2.74k
R49
3.3k
2
10
C60
4.7 µF, 16 V
2
1
Rt
5
10 k
2
VREF
12
14
2
19
C65
2.2 µF, 100 V
5 VUP
5V
5V
C50
1 µF, 50 V
UVLO
GND
R50
40.2k
EN/UVLO
VREF
Sync
GND
1
1
2
13
11
PreDis
VREF
VIN
20
U50
LT3741EUF#PBF
C53
2.2 nF, 50 V
C54
2.2 nF, 50 V
D82
SDM03U40
2
.1" Male Vert.
R54
15k
Buffer
1
1
2
HGPR
1k
C80
100 nF, 25 V
2
J51
P82
5V
R57
909k
PreRegulator Disable
Deadtime Upper
Y
B
VIN
2
31.6 Ω
5V
1k
C81
100 nF, 25 V
Buffer
D83
SDM03U40
C83
100 pF, 25 V
Figure 21: Pre-Regulator for ZVS Class D Wireless Power Transfer Source
Pre-Regulator for ZVS Class D Wireless Power Transfer Source
| 12
Demonstration System EPC9112
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2021 |
5V
QUICK START GUIDE
Demonstration System EPC9112
Ctrombone
680 pF 1111
Adjust on trombone
J1
SMA PCB
Edge
C6
0 Ω 0612
PCB1
Cls3PTU
C3
560 pF 1111
Amplifier
Connection
C4
0 Ω 0612
Coil Matching
C2
15 pF 1111
C5
DNP
C1
DNP
Figure 13: Class 3 Source Board
1
TP3
SMD probe loop
1
Kelvin Output Current
TP4
SMD probe loop
J81
.1" Male Vert.
2
1
Shunt Bypass
VRECT
1
2
R80
300 mΩ,1W
RX Coil
DNP
56 pF
SMD probe loop
TP2
LM 1
Kelvin Output Voltage
1
82 nH
SMD probe loop
VRECT
CM
100 pF
CMP2
DNP
CM 11 CM 7
300 pF DNP
C84
100 nF, 50 V
Matching
LM 11
CM 8
56 pF
VOUT
C85
10 µF, 50 V
D81
40 V, 1 A
VOUT
R81
4.7k
D84
LED 0603
Green
82 nH
CM 12
DNP
VRECT
1
CM 6
Output
1
R82
422 Ω
2
CMP3
DNP
CM 2
D82
40 V, 1A
.1" Male Vert.
TP1
2
Cl1
Cat3PRU
CMP1
DNP
D80
40 V, 1 A
CM1
300 pF
2
1
1
CM 5
DNP
J82
VOUT
D86
LED 0603 Red
D83
40 V, 1 A
D85
2.7 V, 250 mW
D87
33 V, 250 mW
Receive Indicator Over-Voltage Indicator
V OUT > 4 V
V OUT > 36 V
Figure 14: Category 3 Device Board
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| 13
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Demonstration Board Notification
The EPC9122 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 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 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.
