Development Board
EPC9121 Rev. 1.0
Quick Start Guide
EPC2107
10 W Multi-Mode Wireless Power System
QUICK START GUIDE
Demonstration System EPC9121
Source Coil
DESCRIPTION
The EPC9121 wireless power system comprises the four boards (shown
in figures 1 and 2) namely:
1. A multi-mode capable EPC9511 source board (transmitter or power
amplifier)
2. A multi-mode source coil (transmit coil) compatible with the AirFuel
Class 2 standard and Qi (A6) /PMA standards
3. An AirFuel compatible Category 3 AirFuel device coil (receive coil)
with rectifier and DC output
4. A Wireless Power Consortium (Qi) and Power Matters Alliance (now
AirFuel) compatible device coil (receive coil) with rectifier and DC output
The amplifier board features various enhancement-mode GaN devices
which are:
• The 100 V rated EPC2107 half-bridge eGaN® IC with integrated
synchronous bootstrap FET used in the main wireless power amplifier.
• The 100 V rated EPC2036 eGaN FET used in the ZVS disconnect switch
circuit and the main device of the SEPIC converter pre-regulator.
• The 100 V rated EPC2038 eGaN FET used in the controller circuit for
changing set points based on operating mode.
The amplifier is configured for single ended operation and includes
the gate driver(s), oscillators, and feedback controller for the preregulator, which ensures operation for wireless power control based on
the AirFuel standard. This configuration allows for testing compliant to
the AirFuel Class 2 standard over a load range as high as ±35j Ω. The
pre-regulator features the 100 V rated 65 mΩ EPC2036 as the main
switching device for a SEPIC converter.
The amplifier is equipped with a pre-regulator controller that adjusts
the voltage supplied to the class D amplifier based on the limits of
three parameters: coil current magnitude, DC power delivered to
the amplifier, and maximum amplifier supply voltage. The controller
ensures that all the three parameters operate within their respective
limits. Changes in the device load power demand, physical placement
of the device on the source coil and other factors such as metal objects
in proximity to the source coil all contribute to variations in coil
2 |
EPC9511
Amplifier Board
150 mm
47 mm
The EPC9121 is a high efficiency, power demonstration system capable
of operating to multiple wireless power standards. It is compatible
with the Qi standard of the Wireless Power Consortium (WPC), the
Power Matters Alliance (PMA) standard (now merged with AirFuel™
Alliance) and AirFuel (formerly A4WP) wireless power standards. In
AirFuel resonant mode, hence referred to as AirFuel mode, the EPC9121
system operates at 6.78 MHz with the amplifier circuit configured for
ZVS operation. In this mode, the system can deliver up to 10 W of power
into the source coil. In Qi/PMA inductive mode, the system operates
at 165 kHz with the amplifier circuit configured for hard-switching
operation and can deliver up to 5 W of load power into the device. The
purpose of the EPC9121 is to simplify the evaluation process of both
resonant and inductive wireless power technologies using eGaN® FETs
and eGaN® ICs.
57 mm
103 mm
Figure 1: EPC9121 wireless power demonstration system
current, DC power, and amplifier voltage requirements. Based on load
conditions, the controller will ensure the correct operating conditions
for the class D amplifier based on the AirFuel standard. Operation in
the Qi/PMA mode follows the same procedure where only the voltage,
power, and current levels are adjusted accordingly. While this does not
fully follow the Qi standard, it allows the EPC9121 to demonstrate the
capabilities of eGaN FETs and ICs in a multi-mode system. Enhanced
micro-controller based control systems can allow the system to operate
and be compliant to either standard.
The pre-regulator can be bypassed to allow testing with custom control
hardware. The board further allows easy access to critical measurement
nodes facilitating accurate power measurement instrumentation
hookup. A simplified diagram of the amplifier board is given in figure 3.
The source coil is specifically designed to be compatible with all the
wireless standards and can be driven by a single source. The passive
tuning circuits allow for operation at either high or low frequency with
minimal degradation to power delivery capability. The AirFuel portion
of the source coil is compatible with the AirFuel Class 2 standard and
has been pre-tuned to operate at 6.78 MHz. The Qi/PMA portion of the
source coil is compatible with the A6 Qi standard and is designed to
operate at 165 kHz.
The EPC9121 is provided with two receive device units: The first is tuned
to and compatible with the AirFuel Category 3 specification and the
second is an inductive mode unit compatible with the 5 W Qi receiver
standard. Each of the device units 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
an overvoltage condition where the output voltage exceeds 36 V.
For more information on the EPC2107, EPC2036, and EC2038 eGaN
FETs please refer to the respective datasheet available from EPC at
www.epc-co.com. The datasheet should be read in conjunction with
this quick start guide.
| EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016
QUICK START GUIDE
Demonstration System EPC9121
Category 3 Device
Symbol
Parameter
Conditions
Min
Max
Units
VIN
Also Used in Bypass
Mode for Logic Supply
17
24
V
VIN
Main Input Voltage Range –
Pre-Regulator Mode
Amplifier Input
Voltage Range
Bypass Mode
0
80
V
VIN_UVLO+
VIN Rising Threshold
Regulated Mode Only
18.3
V
VIN_UVLO-
VIN Falling Threshold
Regulated Mode Only
IOUT
Vextosc
VPre_Disable
IPre_Disable
VExt_Osc
IExt_Osc
VMode_Src
IMode_Src
VMode_Sel
IMode_Sel
VMode_Ret
IMode_Ret
17.3
V
66
26
V
1.7*
A
-0.3
2.4
0.8
5
V
-0.3
5.5
V
-10
10
mA
-0.3
5
V
-25
25
mA
4.5
5.5
V
30
mA
-0.3
5.1
V
-50
30
mA
-2.5
2.5
V
-25
25
mA
Qi Device
50 mm
VAMP
Regulated AirFuel Mode
Amplifier Supply Voltage Regulated
Qi/PMA Mode
Switch Node
Output Current
External Oscillator
Input ‘Low’
Input Threshold
Input ‘High’
Pre-regulator Disable
Floating
Voltage Range
Pre-regulator Disable
Floating
Current
External Oscillator
Open Drain/
Voltage Range
Collector
External Oscillator
Open Drain/
Current Range
Collector
Mode Select
Source Voltage
Mode Select
Source Current
AirFuel and Qi/PMA
Mode Select Input Voltage
modes
AirFuel
and Qi/PMA
Mode Select Input Current
modes
Mode Select Return
Voltage
Mode Select Return
Current
50 mm
Table 1: Performance Summary (TA = 25°C) EPC9511 Rev. 1.0
80 mm
Figure 2: Device boards AirFuel compatible (top), Qi/PMA compatible (bottom).
1 VDC – 66 VDC – AirFuel mode
1 VDC – 26 VDC – Qi/PMA mode
* Maximum current depends on die temperature – actual maximum current will be subject to switching
frequency, bus voltage and thermals.
Table 2: Performance Summary (TA = 25 °C) AirFuel and Qi/PMA compatible
Device Board
#
Symbol
Parameter
VOUT
IOUT
Conditions
Min
Max
Units
Output Voltage Range
0
38
V
Output Current Range
0
1.5
#
SEPIC
pre-regulator
19 VDC
Coil
| Icoil |
A
VAMP
The Source coil used in this wireless power transfer demonstration 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
directly or EPC for contact information.
The assembly of the EPC9121 wireless power transfer demonstration
kit is simple and shown in figure 1. The source coil and amplifier
have been equipped with SMA connectors. The source coil is simply
connected to the amplifier.
The device board does not need to be mechanically attached to the
source coil. It is strongly recommended to place a 5 mm thick sheet
of Plexiglas on top of the source coil to provide an insulating barrier
for the devices. This will also ensure that the devices are placed
at the correct specified distance above the source coil for optimal
performance to all the operating standards. This barrier also protects
the user touching exposed electrical nodes and static discharge which
can destroy the amplifier board.
6.78 MHz– AirFuel Mode
165 kHz – Qi/PMA Mode
Icoil
Actual maximum current subject to operating temperature limits
MECHANICAL ASSEMBLY
580 mAACRMS – AirFuel mode
1500 mAACRMS – Qi/PMA mode
CS
ZVS Class D
amplifier
X
IAMP
Controller
PAMP
Control reference signal
Figure 3: Block diagram of EPC9511 multi-mode capable wireless
power amplifier controller.
DETAILED DESCRIPTION
The Amplifier Board (EPC9511)
Figure 3 shows the control system block diagram of the EPC9511 ZVS
class D amplifier with pre-regulator and figure 4 shows the power
schematic. The pre-regulator is used to control the ZVS class D wireless
power amplifier based on three feedback parameters:
1. The magnitude of the coil current indicated by the green LED,
2. The DC power drawn by the amplifier indicated by the yellow LED and,
3. A maximum supply voltage to the amplifier indicated by the red LED.
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QUICK START GUIDE
Demonstration System EPC9121
Only one parameter at any time is used to control the pre-regulator with
the highest priority being the maximum voltage supplied to the amplifier
followed by the power delivered to the amplifier and lastly the magnitude
of the coil current. The maximum amplifier supply voltage is pre-set to
66 V in AirFuel mode and 26 V in Qi/PMA mode and the maximum power
drawn by the amplifier is pre-set to 10 W in either mode. The coil current
magnitude is pre-set to 580 mARMS in AirFuel mode and 1500 mARMS in
Qi/PMA mode, but can be made adjustable using P25. The pre-regulator
comprises a SEPIC converter that can operate at full power with an input
supply voltage from 17 V through 24 V.
The pre-regulator can be bypassed by connecting the positive supply
directly to the ZVS class D amplifier supply after removing the jumper
at location JP1 and connecting the main positive supply to the bottom
pin. JP1 can also be removed and replaced with a DC ammeter to directly
measure the current drawn by the amplifier. When doing this, the operator
must provide a low impedance connection to ensure continued stable
operation of the controller. Together with the Kelvin voltage probes (TP1
and TP2) connected to the amplifier supply, an accurate measurement of
the power drawn by the amplifier can be made.
The EPC9511 is also provided with a miniature high efficiency switchmode 5 V supply to power the logic circuits on board such as the gate
drivers and oscillator allowing the EPC9511 board to operate from a
single source.
The amplifier comes with two of its own low supply current oscillators.
This first oscillator is pre-programmed to 6.78 MHz ± 678 Hz and
the second to 165 kHz. The oscillator signal can be disconnected by
removing jumper JP71 and can then be sourced from an external
oscillator when connected to J70. J70 can also serve as an oscillator
reference output when using the internal oscillators.
The pre-regulator can be disabled by inserting a jumper into JP50.
However, note that this connection is floating with respect to the
ground so removing the jumper for external connection requires a
floating switch to correctly control this function. Refer to the datasheet
of the controller IC and the schematic in this QSG for specific details.
The EPC9511 is provided with 3 LED’s that indicate the mode of
operation of the system. If the system is operating in coil current limit
mode, then the green LED will illuminate. For power limit mode, the
yellow LED will illuminate. Finally, when the pre-regulator reaches
maximum output voltage the red LED will illuminate indicating that
the system can no longer regulate either the coil current or delivered
power. This can occur when the magnitude of the load impedance is
too high in AirFuel mode or if the device unit draws insufficient current
in the inductive (Qi) mode.
The EPC9511 amplifier is also equipped with Under Voltage Lockout
(UVLO) protection which prevents the amplifier from starting up with
insufficient voltage on the main supply. This feature is only operational
in the regulated mode and does not affect operation in bypass mode.
In addition, the EPC9511 has protection against reverse polarity
connection of the main supply that is capable of conducting as much
as 11 ADC for a short period.
4 |
Bypass mode
connection
JP1
Pre-regulator
jumper
VAMP
Coil
connection
Preregulator
Q1Aa
VIN
LZVS
+
J1
Q1Ab
CZVS
Q2
Q3
Figure 4: Power circuit schematic of EPC9511 amplifier.
ZVS Timing Adjustment (AirFuel Mode ONLY)
Setting the correct time to establish ZVS transitions is critical to
achieving high efficiency with the EPC9511 amplifier when operating
at high frequency. This can be done by selecting the values for R71 and
R72 or P71 and P72 respectively. This procedure is best performed using
a potentiometer installed at the appropriate locations (P71 and P72)
that is used to determine the fixed resistor values. The timing MUST
initially be set WITHOUT the source coil connected to the amplifier. The
timing diagrams are given in figure 12 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. With power off, remove the jumper in JP1 and install it into JP50 to
place the EPC9511 amplifier into Bypass mode. Connect the main
input power supply (+) to JP1 (bottom pin – for bypass mode) with
ground connected to J1 ground (-) connection.
2. With power off, connect the control input power supply bus (19 V)
to Vin+ connector (J1). Note the polarity of the supply connector.
3. Connect a LOW capacitance oscilloscope probe to the probe-hole of
the half-bridge to be set and lean against the ground post as shown
in figure 8.
4. Turn on the control supply after ensuring that the supply is
approximately 19 V with a 2 A current limit.
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 80 V).
6.While observing the oscilloscope, adjust the applicable
potentiometers to achieve the green waveform of figure 12.
7. Replace the potentiometers with fixed value resistors if required.
Remove the jumper from JP50 and install it back into JP1 to revert
the EPC9511 back to pre-regulator mode.
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QUICK START GUIDE
Demonstration System EPC9121
Determining component values for LZVS (AirFuel Mode ONLY)
The AirFuel compatible device board
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 capacitor CZVS1 is chosen to have a very small
ripple voltage component and is typically around 1 µF. The amplifier
supply voltage and switch-node transition time will determine the
value of inductance for LZVS = LZVS1 + LZVS2 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. The value of the
inductance can be calculated using the following equation:
Figure 17 shows the schematic for the Category-3 AirFuel compatible
device board. The tuning network includes both series and shunt
branches. The tuning 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).
LZVS =
Δtvt
8 fsw (COSSQ + Cwell )
(1)
Where:
Δtvt = Voltage transition time [s]
ƒSW = Operating frequency [Hz]
COSSQ
= Charge equivalent device output capacitance [F].
Cwell
= Gate driver well capacitance [F]. Use 20 pF for the LM5113
NOTE. the amplifier supply voltage VAMP is absent from the equation as it
is accounted for by the voltage transition time. The COSS of the EPC2107
eGaN FETs is very low and lower than the gate driver well capacitance
Cwell which as a result must be now be included in the ZVS timing
calculation. The charge equivalent capacitance can be determined using
the following equation:
VAMP
(2)
COSSQ = 1
COSS(v) dv
VAMP 0
The Qi/PMA compatible device board
Figure 18 shows the schematic for the Qi/PMA compatible device
board. The tuning network includes both series and shunt branches in
accordance with the Qi standard. 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 EPC9511 amplifier board 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 through 11
for proper connection and measurement setup before following the
testing procedures.
The EPC9511 can be operated using any one of two alternative methods
to either wireless power standard:
a. Using the pre-regulator.
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.
The Multi-mode capable source coil
Figure 16 shows the schematic for the source coil which is both AirFuel
Class 2 and Qi A6 compatible. The tuning network is designed to
decouple the two coils from each other based on operating frequency.
In AirFuel mode, the resonant tank circuit yields a high impedance to the
Qi/PMA coil thus preventing current from flowing and influencing the
generated field. In Qi/PMA mode, the small value of the high frequency
coil tuning capacitance yields sufficient impedance at the low frequency
to decouple the AirFuel coil thus preventing current from flowing and
influencing the generated field. The AirFuel mode series tuning network
is differential to allow a balanced connection and voltage reduction for
the capacitors. The tuning network for the Qi coil is in accordance with
the A6 Qi standard.
b. Bypassing the pre-regulator.
a. Operation using the pre-regulator
The pre-regulator is used to supply power to the amplifier in this mode
and will limit the coil current, power delivered or maximum supply
voltage to the amplifier based on the pre-determined settings.
The main 19 V supply must be capable of delivering 2 ADC. It is not
necessary to turn up the voltage of this supply when instructed to
power up the board, instead simply turn on the supply.
1.Make sure the entire system is fully assembled prior to making
electrical connections and make sure jumper JP1 and JP71 are
installed. Select AirFuel or Qi/PMA mode according to figure. 6 and 7.
Also make sure the source coil is attached to the amplifier and that
the device board is connected to a load.
2.With power off, connect the main input power supply bus to J1 as
shown in figure 5. Note the polarity of the supply connector.
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Demonstration System EPC9121
3.Make sure all instrumentation is connected to the system.
4.Turn on the main supply voltage (19 V). It is not necessary start at 0 V.
Instead, preset the voltage to 19 V and then power up.
5.Once operation has been confirmed, observe the output voltage,
efficiency and other parameters on both the amplifier and device
boards.
6.For shutdown, please follow the above five steps in the reverse order.
b. Operation 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. NOTE: In this mode there is
no protection for ensuring the correct operating conditions for the
eGaN devices.
1.Make sure the entire system is fully assembled prior to making
electrical connections and make sure jumper JP1 has been removed
and installed in JP50 to disable the pre-regulator and place the
EPC9511 in bypass mode. Also make sure the source coil is attached
to the amplifier and that device board is connected to a load.
2.With power off, connect the main input power supply bus to the
bottom pin of JP1 and the ground to the ground connection of J1 as
shown in figure 5.
3.With power off, connect the control input power supply bus to +VIN
(J1). Note the polarity of the supply connector. This is used to power
the gate drivers and logic circuits.
4.Make sure all instrumentation is connected to the system.
5.Turn on the control supply – make sure the supply is in the 19 V
range.
6.Turn on the main supply voltage to the required value (it is
recommended to start at 0 V and do not exceed the absolute maximum
voltage of 80 V or the current rating of the main EPC2107 ICs).
7.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. Monitor the temperature of the FETs as device failures can
occur if the junction temperature exceeds 150°C.
8.For shutdown, please follow the above steps in the reverse order.
Start by reducing the main supply voltage to 0 V followed by steps 6
through 2.
NOTE.
1. 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 (shown in Figure 8).
2. AVOID using a Lab Benchtop programmable DC load as the load for the device boards.
These loads have low control bandwidth and will cause the EPC9121 system to oscillate
at a low frequency and may lead to failure. It is recommended to use a fixed low
inductance resistor as an initial load. Once a design matures, a post regulator, such as a
Buck converter, can be used.
6 |
THERMAL CONSIDERATIONS
The EPC9121 demonstration system showcases the EPC2107, EPC2036,
and EPC2038 eGaN FETs and ICs 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 EPC9121 demonstration system has limited current protection only when
operating off the pre-regulator. When bypassing the pre-regulator there is no current
protection on board and care must be exercised not to over-current or over-temperature
the devices. Excessively wide coil coupling and load range variations can lead to increased
losses in the devices.
Precautions
The EPC9121 demonstration system has no controller or enhanced
protection systems and therefore should be operated with caution.
Some specific precautions are:
1.Never operate the EPC9121 system with a receiving device board that
is AirFuel, Qi or PMA compliant as this system does not communicate
with the device to correctly setup the required operating conditions.
Doing so can lead to failure of the compliant device unit. Contact EPC
to obtain instructions should operating the system with a compliant
device be required. Please contact EPC at info@epc-co.com should
the tuning of the coils be required to be changed 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 to 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.
3.Never connect the EPC9511 amplifier board into your VNA in an
attempt to measure the output impedance of the amplifier. Doing
so will severely damage the VNA. Contact EPC should you require
information on the output impedance of the amplifier.
4. It is strongly recommended to place a 5 mm thick Plexiglas spacer on
top of the source coil during testing to protect the user from exposed
electrical contacts and static discharge that can cause the amplifier
to fail.
5.The operator should not change oscilloscope probe locations
or measurements on the board while in operation. Turn off first
before moving the probe to a new location. Failure to follow this
recommendation can lead to board failure.
6. Never touch the coil, or any exposed conductors on the any of the coils
to avoid RF burns and potential failure of the amplifier.
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QUICK START GUIDE
Demonstration System EPC9121
Bypass Connection
Operating mode
LED indicators
Coil current setting
(not installed)
+
19 VDC
VIN Supply
(Note Polarity)
Pre-Regulator Jumper
Pre-regulator
switch-node
oscilloscope probe
Amplifier
switch-node main
oscilloscope probe
Ground post
Ground Post
Amplifier
timing setting
(not installed)
Source coil
connection
External
oscillator
Internal oscillator
selection jumper
Mode select
& LED drive
Disable
pre-regulator
jumper
Amplifier supply voltage
(0 V – 80 Vmax)
V
Figure 5: Proper connection and measurement setup for the EPC9511 amplifier board.
AirFuel Source
Qi / PMA
(+In) (+5 V out) (+In)
Return
(-GND)
AirFuel Source
Qi / PMA
(+In) (+5 V out) (+In)
Return
(-GND)
Amplifier Board – Top-side
Circuit not included with demo
Shown in AirFuel mode position
AirFuel
mode
Qi / PMA
mode
Switch MUST have OFF position!
Amplifier Board – Top-side
Mode select jumper position:
Solid = AirFuel mode
Dash = Qi/PMA mode
GND = Not used
Figure 7: Proper connection setup for operating mode selection using jumpers.
Figure 6: Proper connection setup for operating mode selection using a switch and LEDs.
Do not use
probe ground lead
Ground probe
against post
Place probe tip
in large via
Minimize loop
Figure 8: Proper measurement of switch Node waveforms.
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Demonstration System EPC9121
Qi / PMA mode tuning
Amplifier board connection
AirFuel mode
tuning
Figure 9: Source coil
External load connection
Device output current
(300 mΩ Shunt)
Output voltage
> 4 V LED
Output Voltage
> 36 V LED
mV
A
Device output voltage
(0 V – 38 Vmax)
V
Load current
(See notes for details)
* ONLY to be used with
shunt removed
Tuning
Standoffs for mechanical
attachment to source coil
to these locations (x5)
Half / full bridge
mode jumper
Figure 10: AirFuel compatible device coil with proper connections.
(AirFuel logo used with permission from the AirFuel Alliance)
8 |
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Demonstration System EPC9121
External load connection
Device output current
(300 mΩ Shunt)
Output voltage
> 4 V LED
Output Voltage
> 36 V LED
mV
A
Device output voltage
(0 V – 38 Vmax)
V
Load current
(See notes for details)
* ONLY to be used with
shunt removed
Tuning
Figure 11: Qi/PMA compatible device coil with proper connections
Q1 turn-off
Q2 turn-off
VAMP
VAMP
Q1 turn-on
Q2 turn-on
0
Shoot-through
0
time
Partial ZVS
Shoot-through
time
Partial ZVS
ZVS
ZVS
ZVS + Diode
Conduction
ZVS + Diode
Conduction
Figure 12: ZVS timing diagrams
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Demonstration System EPC9121
Table 3: Bill of Materials - Amplifier Board
Item
Qty
1
2
3
2
2
3
Reference
Part Description
Manufacturer
Part #
1 µF, 10 V
10 nF, 100 V
2.2 µF 100 V
Würth
TDK
Taiyo Yuden
885012105012
C1005X7S2A103K050BB
HMK325B7225KN-T
100 nF, 25 V
Würth
885012105018
5
1
C1, C80
C11, C12
C15, C64, C65
C2, C4, C5, C51, C70, C71, C72, C75, C77, C78, C81,
C100, C101, C130, C200, C210
C20, C22, C46, C131, C135
C21 (Only Populate with Tsns1)
4
16
5
6
1 nF, 50 V
680 pF, 50 V
Würth
Murata
885012205061
GRM155R71H681KA01D
7
1
C45 (Not Populated)
10 nF, 100 V
Murata
C1005X7S2A103K050BB
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
1
2
1
1
1
2
2
1
2
1
5
2
1
3
1
2
11
1
2
1
1
1
3
1
1
2
1
1
1
4
3
1
1
1
1
2
1
2
3
3
1
3
1
1
2
1
1
1
C73 (Not Populated)
C133, C223 (Not Populated)
C220
C221
C27
C3, C95
C30, C50
C32
C43, C53
C52
C6, C7, C31, C44, C82
C61, C62
C63
C90, C91, C92
Czvs1
D1, D95
D2, D3, D21, D40, D41, D42, D47, D48, D49, D71, D72
D20
D203, D221
D35
D36
D37
D4, D100, D101
D60
D90
GP1, GP60
J1
J100
J2
J70, JP1, JP50, JP71
JP10, JP72, JP100
L60
L80
L90
Lsns (Only Populate with Tsns1)
Lzvs1, Lzvs2
P25
P71, P72
Q1
Q2, Q3, Q60
Q20, Q46, Q135
Q61 (Not Populated)
R132, R200, R222
R133
R134
R2, R82
R201
R21
22 pF, 50 V
1 nF, 50 V
100 nF, 16 V
1 nF, 50 V
82 nF, 16 V
22 nF, 25 V
100 nF, 100 V
47 nF, 25 V
10 nF, 50 V
100 pF, 50 V
22 pF, 50 V
4.7 µF, 50 V
10 µF, 35 V
1 µF, 25 V
1 µF, 50 V
40 V, 300 mA
40 V, 30 mA
25 V, 11 A
3 V9, 150mW
LED 0603 Yellow
LED 0603 Green
LED 0603 Red
5 V1, 150 mW
100 V, 1A
40 V, 1A
.1" Male Vert.
.156" Male Vert.
.1" Male Vert.
SMA Board Edge
.1" Male Vert.
.1'' Shunt Jumper
100 µH 2.2 A
10 µH 150 mA
47 µH 250 mA
82 nH (only with Tsns1)
390 nH
10 kΩ
1 kΩ
100 V 220 mΩ with Sync Boot FET
100 V 65 mΩ
100 V 2.8 Ω
100 V 6 A 30 mΩ
18 kΩ 1%
6.81 kΩ 1%
470 kΩ
20 Ω
4.53 kΩ 1%
51 Ω 1/2 W (with Tsns2), 10 kΩ (with Tsns1)
TDK
Murata
Würth
Murata
Murata
Würth
Murata
Würth
Würth
Würth
Würth
Würth
Taiyo Yuden
Murata
Würth
ST
Diodes Inc.
Littelfuse
Bournes
Würth
Würth
Würth
Bournes
On-Semi
Diodes Inc.
Würth
Würth
Würth
Linx
Würth
Würth
Würth
Würth
Würth
CoilCraft
CoilCraft
Murata
Murata
EPC
EPC
EPC
EPC
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
C1005C0G1H220J050BA
GRM1555C1H102JA01D
885012205037
GRM1555C1H102JA01D
GRM155R71C823KA88D
885012205052
GRM188R72A104KA35D
885012205054
885012205067
885012005061
885012005057
885012209048
GMK325BJ106KN-T
GRM188R61E105KA12D
885012207103
BAT54KFILM
SDM03U40-7
SMAJ22A
CD0603-Z3V9
150060YS75000
150060VS75000
150060RS75000
CD0603-Z5V1
MBRS1100T3G
PD3S140-7
61300111121
645002114822
61300411121
CONSMA003.062
61300211121
60900213421
744871101
74479778310
7440329470
1515SQ-82NJEB
2929SQ-391JE
PV37Y103C01B00
PV37Y102C01B00
EPC2107
EPC2036
EPC2038
EPC2007C
ERJ-2RKF1802X
ERJ-2RKF6811X
ERJ-2RKF4703X
ERJ-2RKF20R0X
ERJ-2RKF4531X
ERJ-P06J510V / ERJ-P06J103V
(continued on next page)
10 |
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QUICK START GUIDE
Demonstration System EPC9121
Table 3: Bill of Materials - Amplifier Board (continued)
Item
Qty
Reference
Part Description
Manufacturer
Part #
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
1
1
1
1
1
1
4
1
1
1
2
1
2
1
4
4
1
2
1
1
2
2
1
1
1
1
1
1
1
1
1
1
5
1
1
1
2
1
1
R220
R223
R224
R25
R26
R27
R3
R30, R102, R103, R104
R31
R32
R33
R35, R36
R37
R38, R91
R4
R40, R130, R202, R203
R41, R49, R131, R221
R42
R43, R48
R45 (Not Populated)
R44, R90
R46, R135
R50
R51
R52
R53
R54
R60
R61
R70
R71
R72
R73, R76, R77, R100, R101
R75
R80
R92
TP1, TP2
Tsns1 (Not Populated)
Tsns2
71.5 kΩ
6.8 kΩ 1%
330 kΩ
4.3kΩ 1% (with Tsns2), 6.81 kΩ (with Tsns1)
22 kΩ 1% (with Tsns2), 2.8 kΩ (with Tsns1)
3.3 kΩ 1%
27 kΩ
100 Ω
71 kΩ 5 1%
8.2 kΩ 1%
75 kΩ
634 Ω
150 kΩ 1%
49.9 kΩ 1%
4.7 Ω
261 kΩ
6.04 kΩ
36.5 kΩ
15.4 kΩ
1.5 kΩ
100 kΩ 1%
11.3 kΩ
10 Ω
124 kΩ 1%
71.5 kΩ 1%
1.00 kΩ
0Ω
80 mΩ 0.4 W
220 mΩ 0.333 W
47 kΩ
430 Ω
180 Ω
10 kΩ
68 kΩ
2.2 Ω
9.53 kΩ 1%
SMD Probe Loop
10 µH 1:1 96.9%
1:20 Current Xrmr
ERJ-3EKF7152V
ERJ-2RKF6801X
ERJ-2RKF3303X
ERJ-2RKF4301X / ERJ-2RKF6811X
ERJ-2RKF2202X / ERJ-2RKF2801X
ERJ-2RKF3301X
ERJ-2RKF2702X
ERJ-3EKF1000V
ERJ-6ENF7152V
ERJ-2RKF8201X
ERJ-2RKF7502X
ERJ-2RKF6340X
ERJ-2RKF1503X
ERJ-2RKF4992X
RMCF0402FT4R70
ERJ-3EKF2613V
ERJ-2RKF6041X
ERJ-2RKF3652X
ERJ-2RKF1542X
ERJ-2RKF1501X
ERJ-2RKF1003X
ERJ-2RKF1132X
ERJ-3EKF10R0V
ERJ-2RKF1243X
ERJ-2RKF7152X
ERJ-2RKF1001X
ERJ-2GE0R00X
WSLP0603R0800FEB
RL1220S-R22-F
ERJ-2RKF4702X
ERJ-2RKF4300X
ERJ-2RKF1800X
ERJ-2RKF1002X
ERJ-2RKF6802X
RMCF0402FT2R20
ERJ-2RKF9531X
5015
PFD3215-103ME
CST7030-020LB
95
1
U1
100 V eGaN Driver
96
97
98
99
100
101
102
103
104
105
106
107
108
3
1
1
1
1
1
1
1
1
1
1
1
1
U130, U200, U220
U210
U30
U50
U70
U71
U72
U75
U77
U78
U80
U90
PCB
Comparator
+Edge-trig D-Flop with Clr & Rst
Power & Current Monitor
Boost Controller
Pgm Osc.
2 In NAND
2 In AND
Dither Oscillator
MUX
Reconfig Logic 57
Gate Driver with LDO
1.4 MHz 24 V 0.5 A Buck
EPC9511 Amplifier Board
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Stackpole
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Vishay Dale
Susumu
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Stackpole
Panasonic
Keystone
CoilCraft
CoilCraft
National
Semiconductor
Texas Instruments
Fairchild
Linear
Texas Instruments
EPSON
Fairchild
Fairchild
mAxim
Fairchild
Fairchild
Texas Instruments
MPS
EPC
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016 |
LM5113TM
TLV3201AIDBVR
NC7SZ74L8X
LT2940IMS#PBF
LM3478 mAX/NOPB
SG-8002CE-PHB-6.780MHz
NC7SZ00L6X
NC7SZ08L6X
DS1090U-32+
NC7SZ157L6X
NC7SZ57L6X
UCC27611DRV
MP2357DJ-LF
B5008 Rev. 1.0
| 11
QUICK START GUIDE
Demonstration System EPC9121
Table 4: Off Board Components
Item
Qty
1
2
3
1
2
1
Reference
Part Description
Manufacturer
Part #
SW1000
D1000, D1001
J1000
Rocker SW SPDT 120 V 5 A
40x12mm LED backlight
Con4x1.1F
E-Switch
BCrobotics
TE Connectivity
100SP3T1B1M1QEH
LEDB-003
534237-2
Reference
Part Description
Manufacturer
Part #
C1
C2
C3
Ctrmb
C20
C21
C22
C30
C31
L30
J1
PCB
DNP
DNP
390 pF, 500 V
560 pF, 500 V
100 nF, 100 V
47 nF, 100 V
12 nF, 50 V
1000 pF, 200 V
68 pF, 1500 V
270 nH
SMA Edge
Multi-mode Coil - with ferrite
—
—
Johanson
Johanson
Kemet
TDK
Murata
Johanson
Johanson
CoilCraft
Linx
NuCurrent
—
—
501S42E391JV3E
501S42E561JV3E
C1812C104J1GACTU
C4532C0G2A473J200KA
GRM2195C1H123JA01D
201S42E102GV3E
152S42E680GV3E
2222SQ-271JE
CONSMA013.031
NC21-T118L01-152-113-1R10
Table 5: Bill of Materials - Source Coil
Item
Qty
1
2
3
4
5
6
7
8
9
10
11
12
1
1
1
1
1
1
1
1
1
1
1
1
Table 6: Bill of Materials for the Category-3 AirFuel Device Board
Item
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
1
2
4
4
1
1
4
1
1
1
1
2
2
1
1
1
4
1
Reference
Part Description
Manufacturer
Part #
C84
C85
CM1, CM11
CM2, CM12, CMP1, CMP2
CM5, CM7, CMP3, CMP4
CM6
CM8
D80, D81, D82, D83
D84
D85
D86
D87
J81, J82
LM1, LM11
R80
R81
R82
TP1, TP2, TP3, TP4
PCB
100 nF, 50 V
10 µF, 50 V
470 pF, 500 V
DNP
DNP
56 pF, 500 V
68 pF, 500 V
40 V 1A
LED 0603 Green
2.7 V 250 mW
LED 0603 Red
33 V 250 mW
.1" Male Vert.
82 nH
300 mΩ 1 W
4.7 kΩ
422 Ω
SMD Probe Loop
AirFuel Cat3 Device
Würth
Murata
Johanson
—
—
Johanson
Johanson
Diodes Inc.
Würth
NXP
Würth
NXP
Würth
Würth
Stackpole
Stackpole
Yageo
Keystone
EPC
885012206095
GRM32DF51H106ZA01L
501S42E471JV3E
—
—
501S42E560JV3E
501S42E680JV3E
PD3S140-7
150060VS75000
BZX84-C2V7,215
150060RS75000
BZX84-C33,215
61300211121
744912182
CSRN2512FKR300
RMCF1206FT4K70
RMCF0603FT422R
5015
B5012
EPC would like to acknowledge Würth Electronics (www.we-online.com/web/en/wuerth_elektronik/start.php), Coilcraft (www.coilcraft.com), and KDS Daishinku America (www.kdsamerica.com) for their support of this project.
Table 7: Bill of Materials for the Qi/PMA Compatible Device Board
12 |
Item
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
1
1
1
1
2
1
4
1
1
1
1
2
1
1
1
4
1
Reference
Part Description
Manufacturer
Part #
C84
C85
Cl1
CM1
CM2
CM5, CM6
CMP1
D80, D81, D82, D83
D84
D85
D86
D87
J81, J82
R80
R81
R82
TP1, TP2, TP3, TP4
PCB
100 nF, 50 V
10 uF 50 V
7.5 uH 3 A
12 nF 50 V
100 nF 50 V
DNP
DNP
40V 1A
LED 0603 Green
2.7 V 250 mW
LED 0603 Red
33V 250mW
.1" Male Vert.
300 mΩ 1W
4.7 kΩ
422 Ω
SMD Probe Loop
Inductive Device
Würth
Murata
Würth
Murata
Würth
—
—
Diodes Inc.
Würth
NXP
Würth
NXP
Würth
Stackpole
Stackpole
Yageo
Keystone
EPC
885012206095
GRM32DF51H106ZA01L
760308102210
GRM2195C1H123JA01D
885012208087
—
—
PD3S140-7
150060VS75000
BZX84-C2V7,215
150060RS75000
BZX84-C33,215
61300211121
CSRN2512FKR300
RMCF1206FT4K70
RMCF0603FT422R
5015
B5011
| EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016
5V
1
2
1
R75
68 K
2
1
R70
47 K
OSC
3
4
GND
VCC
OSC
OUT
HFOsc
Dither
OSC
Pre
Scale
VCC
Q5 V
L Fosc
C75
100 nF, 25 V
Q5 V
R76
10 K
R77
10 K
5V
5V
C78
100 nF, 25 V
XNOR
5V
GND
1
0
VCC
5V
OSC
Nclr
OSC
Nclr
4
C77
100 nF, 25 V
4
DNP
40x12 mm
DNP
D1001
Y
U72
NC 7SZ08L 6X
U71
NC 7SZ00L 6X
40x12 mm
D1000
C72
100 nF, 25 V
B
A
5V
5V
2
D71
40 V 30 mA
SDM0 3U40-7
430 Ω
R71
R72
2
DNP
SW1000
D100
CD 0603-Z5V1
R101
10 K
C101
100 nF, 25 V
QiMode
AirFuel / WPC-Qi Mode Select & LED driver
C100
100 nF, 25 V
A4WPmode
D101
CD0603-Z5V1
Pre-Regulator
Nclr
Vamp
Vout
Vin
1
T P2
1
R103
100 Ω
R102
100 Ω
Vamp
OUT
R104
100 Ω
2
2 QiMode
A4WPmode
SMD probe loop
1
T P1
L in
Hi n
5V
VAMP
EPC9511ZVSCD_Rev1_0.SchDoc
A5V 1
5V
Q5V
LEDret
L _Sig1
GND
Icoil
5V
A4WPmode
OutA
Vamp
Vamp
Vout
Vin
D20
25 V, 11 A
SMAJ22A
A4WPmode
Czvs1
1μF 50 V
L zvs2
390 nH
ZVS Tank Circuit
L zvs1
390 nH
T sns2
CST7030-020LB
1:20 Current Xrmr
Coil Current Sense
Reverse Polarity Protection
Vin
PreRegulator
EPC9511PR_R1_0.SchDoc
Vin
Main Supply
19 V 1 Amax
1
2
J1
.156" Male Vert.
SMD probe loop
5V
Vo ff
Icoil
5V
H_Sig1
.1" Male Vert.
1
2
3
4
1
2
3
4
Con4x1.1 F
DNP
J100
J1000
Internal / External Oscillator
OSC
Jumper 100
JP72
External Oscillator
JP71
.1" Male Vert.
IntOsc
L _Sig1
H_Sig1
.1" Male Vert.
1
2
J70
D72
40 V 30 mA
SDM03U40-7
180 Ω
OSC
1
1K
EMPTY
P72
Deadtime Fall
1
1K
EMPTY
P71
Deadtime Rise
AirFuel / WPC-Qi Mode Select & LED external
R1 00
10k
Vo ff
B
A
C71
100 nF, 25 V
5V
5V
U78
Reconfig Logic 57
NC7SZ57L6X
5V
IntOsc
U77
NC7SZ157L 6X
C92
1 μF, 25 V
Switch Change Detect
6
1
3
Oscillator Select
A4WPmode
QiMode
3
LFosc
A4WPmode 6
1
HFOsc
C91
1 μF, 25 V
L 90
47 μH 250 mA
C95
22 nF, 25 V
BAT54KFILM
D95
C90
1 μF, 25 V
Figure 13: EPC9511 - ZVS class-D amplifier schematic
L F Oscillator
1
6
1
Vin
D90
40 V 1 A
PD3S140-7
C73
22 pF, 50 V
EMPTY
C70
100 nF, 25 V
A5 V
U75
DS 1090U-32+
3
GND
Bias
GND
DRV
U70
SG-8002CE-PHB- 6.780 MHz
A5 V
Reg
CNTL
IN
5
Logic Supply Regulator
R73
10 K
FB
0.81V
EN
OSC
U90
MP 2357DJ-L F
HF Oscillator
OE
R92
9.53 K 1%
R91
49.9 K 1%
A5 V
2
1
2
R90
100 K 1%
J0
5
M ode
Nclr
GND
1
J1
6
1
2
1
2
JC0
7
2
R21
51 ohm 1/2 W
1
EMPTY
C21
680 pF, 50 V
D21
SDM0 3U40-7
40 V 30 mA
P25
10 K
EMPTY
C22
1 nF, 50 V
ZVS Tank Disconnect
Q3
EPC2036
100 V 65 mΩ
R2 6
22 K 1%
Current Adjust
Tsns1
10 μH 1:1 96.9%
EMPTY
Q2
EPC2036
100 V 65 mΩ
Va mp
Lsns
82 nH
EMPTY
6
1
JP10
Vout
Vamp
JP1
.1" Male Vert.
Jumper 100
R25
4.3 K 1%
J2
SMA Board Edge
Q20
EPC2038
100 V 2.8 Ω
R2 7
3.3 K 1%
C20
1nF, 50 V
QiMode
C27
82 nF, 16 V
Icoil
Pre-Regulator Disconnect
1
2
1
2
2
4
2
JC1
8
4
3
2
3
4
1
2
5
2
5
V CC
GND
3
2
1
2
1
2
Vin
1
2
1
2
2
1
2
1
1
4
1
V off
2
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016 |
2
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Demonstration System EPC9121
| 13
Lin
C7
22 pF, 50 V
Lin
Hin
C3
22n F, 25 V
D3
SDM03U40-7
40 V 30 mA
R2
20 Ω
GND
1
GL
2
C4
100 nF, 25 V
OUT
GL
GL
Out
GU
GU
5 VHS
4.7 V
C1
1 μF, 10 V
D1
BAT54KFILM
Ground Post
.1" Male Vert.
1
GP1
5V
VAMP
D4
CD0603-Z5V1
5VHS
Synchronous Bootstrap Power Supply
R4
4 Ω7
D2
SDM03U40-7
R3
27 K
Gbtst
Gate Driver
U1
L M5113T M
Figure 14: EPC9511 - Gate driver and power devices schematic
C6
22 pF, 50 V
Hin
C5
100 nF, 25 V
4.7 V
C2
100 nF, 25 V
5V
5V
1
1
2
14 |
2
Q1B
EPC2107
ProbeHole
GL
1
PH1
GU
GND
C15
2.2 μF 100 V
Vamp
C11
10 nF, 100 V
Vamp
Out
OUT
Q1A
E PC2107
100 V 220 mΩ with SB
Vamp
C12
10 nF, 100 V
Vamp
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Demonstration System EPC9121
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1
Vamp
CD 0603-Z3V9
R202
261 K
Icoil
2
R46
11.3 K
D41
SDM0 3U40-7
R41 40 V 30 mA
6.04k
Vom
2
SDM0 3U40-7
40 V 30 mA
R43
15.4 K
R201
4.53 K 1%
1 Vre f
4
3
1
R53
1.00 K
Clear
Voff
C44
22 pF, 50 V
Vfdbk
6
5V
1
C52
100 pF
CLR
CLK
D
PR
R32
8.2 K 1%
2
5
3
Figure 15: EPC9511 - Pre-regulator schematic
Nclr
C210
100 nF, 25 V
5V
Vdown
Vsepic
Voltage Switch Threshold Latch
Q
Q
5V
Isens
FB
C32
47 nF, 25 V
Pcmp
V+
1 R3 0
2
100 Ω
C30
100nF, 100V
Agnd
2
UVLO
Vin
8
9
Vsepic
DR
VCC
6
1
Lo
Hi
C135
1 nF, 50 V
Mode
I+
2
Q
IImon
1
2
CMPout
CMPout
R130
261 K
Vout
R131
6.04 K
4
5
Vout
R132
18 K 1%
R135
11.3 K
C131
1 nF, 50 V
2
VDD
4
3
5V
1
2
C133
1 nF, 50 V
EMPTY
1 R134
470 K
2
U130
T LV3201AIDBVR
5V
R35
2
634 Ω
C130
100 nF, 25 V
5V
D36
1
75 K
R33
Current Mode
Power Mode
D35
1
Gate Driver
GLPH
GLPL
5 VGD
R37
R80
2 Ω2
R38
49.9 K 1%
GLPH 1
1 R36
2 5V
634 Ω
2 Pcmp
EP Isns
5
4
6
150 K 1%
D37
1
VSS
VREF
C81
100 nF, 25 V
Isns
5 VGD
Voltage Mode
U80
UCC27611DRV
LDO
C80
1μF, 10 V
Isns
5 VGD
C65
2.2 μF, 100 V
Vout
C82
22pF, 50V
Isns
3
2
Isns
PWM
1
5 VGD
L 80
10 μH 150 mA
R133
6.81 K 1%
5V
Iled
Pled
Pmon
Imon
5V
1 R82
20E
Pmon
Vo ut
DC Power Monitor
CLR LE
D
GND
Q135
EPC2038
100 V 2.8 Ω
Latch
UVLC
1.24 V
R6 1
PreDR
C50
100 nF, 100 V
220 mΩ 0.333 W
U30
LT2940IMS#PBF
CMP+
V-
7
3
V+
8
Pgnd
Cnt
U50
L M3478MAX/NOPB
1 R5 0
10 Ω
Osc
Vin
1.26 V
Comp
FA/SD
C53
10 nF, 50 V
1
3
2
Comp
Vfdbk
7
FA/SD
C31
22 pF, 50 V
R54
0Ω
R52
71.5 K 1%
R51
124 K 1%
5V
R31
71 K5 1%
Isns
U210
NC7SZ74L 8X
2
Vo ff 7
1
5V
Vout
C51
100 nF, 25 V
U200
T LV3201AIDBVR
5V
1
2
JP50
.1” Male Vert.
PreRegulator Disable
C200
100 nF, 25 V
5V
Voltage Switch Threshold Detect
R203
261 K
R20
18 K 1%
5V
SDM0 3U40-7
40 V 30 mA
R44
100 K 1%
D42
Output Current Limit
C43
10 nF, 50 V
2
D40
Output Power Limit
R45
1.5 K
EMPTY
261k
R40
Pmon 1 R4 2
36.5k
C46
1 nF, 50 V
D203
1
SDM0 3U40-7
40 V 30 mA
D47
R48
15.4k
Output Voltage Limit
Q46
EPC2038
100 V 2.8 Ω
Mode
2
Mode Switch protection
SDM0 3U40-7
40 V 30 mA
D49
C45
10 nF, 100 V
EMPTY
Vout
UVLO
SDM0 3U40-7
40 V 30 mA
R49
1
1
2
1
2
2
1
1
2
1
2
6.04k
4
2
1
5
12
1
11
D48
10
CD0603-Z3V9
D221
R220
71.5 K
Vin
Isns
R221
6.04 K
R222
18 K 1%
R60
80 mΩ 0.4 W
GLPL
Q60
EPC2036
100 V 65 mΩ
SW
C221
1nF, 50 V
4
3
5V
UVLO
C64
2.2 μF 100 V
Vsepic
C223
1 nF, 50 V
EMPTY
1 R224
330 K
2
U220
T LV3201AIDBVR
1
C220
100 nF, 16 V
5V
5V
GND
Ground Post
1
GP60
.1" Male Vert.
Q61
EPC2007C
100 V 6 A 30 mΩ
EMPTY
ProbeHole
1
PH60
C62
4.7μF 50 V
Vin
Under-Voltage Lock-Out
Set to 17.3 - 18.3 V
R223
6.8 K 1%
5V
D60
MBRS1100T 3G
100 V 1 A
C63
10 μF 35 V
C61
4.7μF 50 V
Vin
L 60
100 μH 2.2 A
2 GLPL
Vin
Vin
4
3
Voff
1
2
1
2
1
2
1
2
2
1
2
1
2
6
1
2
5
2
8
VCC
GND
4
1
2
1
2
1
2
1
2
1
5
2
1
2
2
1
2
1
1
2
1
2
5
2
1
2
1
2
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016 |
2
QUICK START GUIDE
Demonstration System EPC9121
| 15
QUICK START GUIDE
Demonstration System EPC9121
J1
SMA Edge
C20
100 nF
1812
Ctrmb
560 pF 1111
adjust on
trombone
C22
12 nF
0805
C21
47 nF
1812
Amplifier
connection
L30
270 nH
Qi Coil
C30
1 nF
1111
AirFuel coil
C1
DNP
C31
68 pF
1111
C2
DNP
C3
390 pF
1111
Figure 16: Source coil schematic
1
1
Kelvin Output Current
TP3
SMD probe loop
TP4
SMD probe loop
J81
.1" Male Vert.
2
1
Shunt Bypass
1
Vrect
2
Vout
R80
300mΩ 1 W
RX Coil
CMP3
DNP
Output
1
SMD probe loop
Kelvin Output Voltage
TP2
LM1
1
82 nH
SMD probe loop
Vrect
CMP4
CMP2
EMPTY
DNP
CM11
470 pF
C84
100 nF, 50 V
Matching
CMP7
EMPTY
LM11
Vout
C85
10 μF 50 V
R81
4.7 K
R82
422 Ω
D84
LED 0603 Green
82 nH
CM12
DNP
Vout
Vrect
2
CMP1
EMPTY
Cl1
Cat3PRU
56 pF
.1" Male Vert.
TP1
1
EMPTY
CM6
D82
40 V 1 A
2
CM2
D80
40 V 1 A
CM1
470 pF
2
1
1
CM5
EMPTY
J82
D81
40 V 1 A
CM8
68 pF
D86
LED 0603 Red
D83
40 V 1 A
D85
D87
2.7 V 250 mW
33 V 250 mW
Remove Center Jumper on Coil for full bridge operation
Receive Indicator
Vout > 4 V
Over-Voltage Indicator
Vout > 36 V
Figure 17: Category-3 AirFuel device schematic
16 |
| EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016
RX Coil
CMP1
DNP
Figure 18: Qi/PMA device schematic
QiDeviceCoil
7.5 μH 3A
Cl1
CM 2
100 nF 50 V
CM 1
12 nF 50 V
CM 5
DNP
CM 6
DNP
Matching
D81
40 V 1 A
D80
40 V 1 A
Vrect
1
D83
40 V 1 A
D82
40 V 1 A
1
1
C84
100 nF, 50 V
Vrect
Vout
Output
.1" Male Vert.
2
1
J82
Shunt Bypass
C85
10 μF 50 V
Vrect
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016 |
33 V 250 mW
D87
D86
LED 0603 Red
R82
422 Ω
Vout
Over-Voltage Indicator
Vout > 36 V
2.7 V 250 mW
D85
D84
LED 0603 Green
R81
4.7 K
Vout
Receive Indicator
Vout > 4 V
Kelvin Output Voltage
SMD probe loop
1
TP2
SMD probe loop
1
TP1
R80
300mΩ 1 W
2
J81
.1" Male Vert.
2
1
TP4
SMD probe loop
1
2
Kelvin Output Current
1
2
TP3
SMD probe loop
QUICK START GUIDE
Demonstration System EPC9121
| 17
QUICK START GUIDE
Demonstration System EPC9121
EFFICIENT POWER CONVERSION
EPC would like to acknowledge Würth Elektronik (www.we-online.com) for their support of this project.
Würth Elektronik is a premier manufacturer of electronic and electromechanical passive components. EPC has partnered up with
WE for a variety of passive component requirements due to the performance, quality and range of products available. EPC9121
development board features various WE product lines including a wireless power charging coil, power inductors, capacitors, LEDs
and connectors.
One of the highlights on the board is the 37 x 37 mm sized wireless power charging receiver coil engineered out of Würth
Elektronik’s design center in Munich, Germany. Based off of EPC’s transmitting and receiving controller requirements, the coils and
associated capacitors have been carefully selected to optimize efficiency for power transfer as well as meet compliance for the Qi
charging standard. Litzwire and high permeability materials are utilized in construction of the coil to yield the highest Q-factor
possible. Pot core construction minimize undesirable stray magnetic fields. The coils have been built and endurance tested beyond
what the industry calls for due to its commitment to quality standards as a German company.
Also featured on the board are a wide range of Würth Elektronik power inductor technologies including the WE-DD coupled, WE-PMI
multilayer chip and WE-AIR air core inductors. The inductors very chosen for their balance between size, efficiency, and power
handling. Lowest core losses where applicable. High current handling capability. Extremely low DCR losses. Magnetically shielded
where applicable. Engineered for reliability.
Learn more at www.we-online.com.
EPC would like to acknowledge Johanson Technology (www.johansontechnology.com) for their support of this project. Information
on the capacitors used in this kit can be found at http://www.johansontechnology.com/S42E.
EPC would like to acknowledge NuCurrent (www.NuCurrent.com) for their support of this project.
NuCurrent is a leading developer of high-efficiency antennas for wireless power applications. Compliant across Alliance for
Wireless Power (A4WP), Wireless Power Consortium (Qi) and Power Matters Alliance (PMA) standards, NuCurrent works closely with
electronic device OEMs and integrators to custom-design, rapid-prototype and integrate the optimal antenna for a broad range
of applications. NuCurrent’s patented designs, structures and manufacturing techniques mitigate typical high frequency effects,
offering higher efficiency, smaller sizes, higher durability and lower cost with wireless power application development.
For more information, visit http://nucurrent.com
Logos and trademarks belong to the respective owner. AirFuel™ logo used with permission.
Note that this demonstration kit is not compliant with any wireless power standard. It can be used to evaluate wireless power transfer according to the standards and is meant as a tool to
evaluate eGaN® FETs and eGaN® ICs in this application.
EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2016 |
| 18
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EPC Products are distributed through Digi-Key.
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Demonstration Board Notification
The EPC9121 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 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.