Epc Epc9509 User manual

Demonstration System

EPC9509

Quick Start Guide

EPC2108 and EPC2036

6.78 MHz, ZVS Class-D Wireless Power Amplier

QUICK START GUIDE

Demonstration System EPC9509

DESCRIPTION

The EPC9509 is a high eciency, Zero Voltage Switching (ZVS), class-D

wireless power amplier demonstration board that operates at 6.78 MHz

(Lowest ISM band). The purpose of this demonstration system is to sim-

plify the evaluation process of wireless power amplier technology using

eGaN® FETs by including all the critical components on a single board

that can be easily connected into an existing system.

The amplier board features the enhancement-mode, half-bridge eld

eect transistor (FET), the 60 V rated EPC2108 eGaN FET with integrated

synchronous bootstrap FET. The amplier can be set to operate in either

dierential mode or single-ended mode and includes the gate driver/s,

oscillator, and feedback controller for the pre-regulator that ensures

operation for wireless power control based on the A4WP standard. This

allows for testing compliant to the A4WP class 3 standard over a load

range as high as ±50j Ω. The pre-regulator features the 100 V rated 65 mΩ

EPC2036 as the main switching device for a SEPIC converter.

For more information on the EPC2108 eGaN FETs please refer to the data-

sheet available from EPC at www.epc-co.com. The datasheet should be

read in conjunction with this quick start guide.

Table 1: Performance Summary (TA= 25°C) EPC9509

Symbol Parameter Conditions Min Max Units

VIN

Bus Input Voltage Range –

Pre-Regulator Mode

Also used in

bypass mode

for logic supply

17 24 V

VIN

Amp Input Voltage Range –

Bypass Mode 0 52 V

VOUT

Switch-Node Output

Voltage 52 V

IOUT

Switch-Node Output

Current (each) 1* 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 Floating -0.3 5.5 V

IPre_Disable

Pre-Regulator Disable

Current Floating -10 10 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

VsgnDi

Dierential or Single-Select

Voltage

Open Drain/

Collector -0.3 5.5 V

IsgnDi

Dierential or Single-Select

Current

Open Drain/

Collector -1 1 mA

EPC9509 amplier board photo

DETAILED DESCRIPTION

The Amplier Board (EPC9509)

Figure 1 shows the system block diagram of the EPC9509 ZVS class-D

amplier with pre-regulator and gure 2 shows the details of the ZVS

class-D amplier section. The pre-regulator is used to control the ZVS

class-D wireless power amplier based on three feedback parameters

1) the magnitude of the coil current indicated by the green LED, 2) the

DC power drawn by the amplier indicated by the yellow LED and 3)

a maximum supply voltage to the amplier indicated by the red LED.

Only one parameter at any time is used to control the pre-regulator

with the highest priority being the maximum voltage supplied to the

amplier followed by the power delivered to the amplier and lastly the

magnitude of the coil current. The maximum amplier supply voltage

is pre-set to 52 V and the maximum power drawn by the amplier is

pre-set to 16 W. The coil current magnitude is pre-set to 800 mARMS but

can be made adjustable using P25. The pre-regulator comprises a SEPIC

converter that can operate at full power from 17 V through 24 V.

The pre-regulator can be bypassed by connecting the positive supply

directly to the ZVS class-D amplier supply after removing jumper JP1 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 amplier. When doing this observe

a low impedance connection to ensure continued stable operation of

the controller. Together with the Kelvin voltage probes (TP1 and TP2)

connected to the amplier supply, an accurate measurement of the

power drawn by the amplier can be made. The EPC9509 is also provided

with a miniature high eciency switch-mode 5 V supply to power the logic

circuits on board such as the gate drivers and oscillator.

The amplier comes with its own low supply current oscillator that is

pre-programmed to 6.78 MHz ± 678 Hz. It can be disabled by placing

a jumper into JP70 or can be externally shutdown using an externally

controlled open collector / drain transistor on the terminals of JP70 (note

which is the ground connection). The switch needs to be capable of

sinkingatleast25mA.Anexternaloscillatorcanbeusedinsteadoftheinternal

oscillator when connected to J70 (note which is the ground connection)

and the jumper (JP71) is removed.

* Maximum current depends on die temperature – actual maximum current will be subject to switching

frequency, bus voltage and thermals.

QUICK START GUIDE

Demonstration System EPC9509

The pre-regulator can also be disabled in a similar manner as the oscillator

using JP50. However, note that this connection is oating with respect to the

ground so removing the jumper for external connection requires a oating

switch to correctly control this function. Refer to the datasheet of the con-

troller IC and the schematic in this QSG for specic details.

The ZVS timing adjust circuits for the ZVS class D ampliers are each

independently settable to ensure highest possible eciency setting and

includes separate ZVS tank circuits. This allows OOK modulation capability

for the amplier.

The EPC9509 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 illumi-

nate. Finally, when the pre-regulator reaches maximum output voltage the

red LED will illuminate indicating that the system is no longer A4WP compli-

ant as the load impedance is too high for the amplier to drive. When the

load impedance is too high to reach power limit or voltage limit mode, then

the current limit LED will illuminate incorrectly indicating current limit mode.

This mode also falls outside the A4WP standard and by measuring the am-

plier supply voltage across TP1 and TP2 will show that it has nearly reach

the maximum value limit.

Single ended or Dierential Mode operation

The EPC9509 amplier can be operated in one of two modes; single-

ended or dierential mode. Single ended operation oers higher amplier

eciency but reduced imaginary impedance drive capability. If the

reected impedance of the tuned coil load exceeds the capability of

the amplier to deliver the desired power, then the amplier can be

switched over to dierential mode. In dierential mode, the amplier is

capable of driving an impedance range of 1 Ω through 56 Ω and ±50j Ω and

maintains either the 800 mARMS coil current or deliver up to 16 W of power.

The EPC9509 is set by default to dierential mode and can be switched to

single ended mode by inserting a jumper into 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.

For dierential mode only operation, the two ZVS inductors LZVS1 and LZVS2

can be replaced by a single inductor LZVS12 and by removing CZVS1 and CZVS2.

ZVS Timing Adjustment

Setting the correct time to establish ZVS transitions is critical to

achieving high eciency with the EPC9509 amplier. This can be

done by selecting the values for R71, R72, R77, and R78 or P71, P72,

P77, and P78 respectively. This procedure is best performed using a

potentiometer installed at the appropriate locations that is used to

determine the xed resistor values. The procedure is the same for both

single-ended and dierential mode of operation. The timing MUST

initially be set WITHOUT the source coil connected to the amplier.

The timing diagrams are given in Figure 5 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 o, remove the jumper in JP1 and install it into JP50 to place

the EPC9509 amplier 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 o, connect the control input power supply bus (19 V) to (+)

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 4.

4. Turn on the control supply – make sure the supply is approximately 19 V.

5. Turn on the main supply voltage starting at 0 V and increasing to the re-

quired predominant operating value (such as 24 V but NEVER exceed the

absolute maximum voltage of 52 V).

6. While observing the oscilloscope adjust the applicable potentiometers to

so achieve the green waveform of gure 5.

7. Repeat for the other half-bridge.

8. Replace the potentiometers with xed value resistors if required. Remove

the jumper from JP50 and install it back into JP1 to revert the EPC9509

back to pre-regulator mode.

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 capacitors CZVS1 and CZVS2 are chosen to have a

very small ripple voltage component and are 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)

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. that the amplier supply voltage VAMP is absent from the equation as

it is accounted for by the voltage transition time. The COSS of the EPC2108

eGaN FETs is very low and lower than the gate driver well capacitance Cwell

which as a result must now be included in the ZVS timing calculation.

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 2ns through 12ns. For the

dierential case the voltage and charge (COSSQ) are doubled when

calculating the ZVS inductance.

LZVS = ∆tvt

8 ∙ fsw∙ COSSQ + Cwell

COSSQ =

VAMP

∙

∫

VAMP

COSS (v) ∙ dv

QUICK START GUIDE

Demonstration System EPC9509

QUICK START PROCEDURE

The EPC9509 amplier board is easy to set up and evaluate the

performance of the eGaN FET in a wireless power transfer application.

The EPC9509 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 coil current, power delivered or maximum

supply voltage to the amplier based on the pre-determined settings.

The main 19 V supply must be capable of delivering 2 ADC. DO NOT

turn up the voltage of this supply when instructed to power up the

board, instead simply turn on the supply. The EPC9509 board includes a

pre-regulator to ensure proper operation of the board including start up.

1. Make sure the entire system is fully assembled prior to making electri-

cal connections and make sure jumper JP1 is installed. Also make sure

the source coil and device coil with load are connected.

2. With power o, connect the main input power supply bus to J1 as

shown in gure 3. Note the polarity of the supply connector.

3. Make sure all instrumentation is connected to the system.

4. Turn on the main supply voltage to the required value (19 V).

5. Once operation has been conrmed, observe the output voltage,

eciency and other parameters on both the amplier and device

boards.

6. For shutdown, please follow 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 amplier. This allows the amplier to be

operated using an external regulator. In this mode there is no protection

for ensuring the correct operating conditions for the eGaN FETs.

When in bypass mode it is crucial to slowly turn up the supply voltage

starting at 0 V. Note that in bypass mode you will be using two supplies;

one for logic and the other for the amplier power.

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

EPC9509 in bypass mode. Also make sure the source coil and device

coil with load are connected.

2. With power o, connect the main input power supply bus +VIN to the

bottom pin of JP1 and the ground to the ground connection of J1 as

shown in gure 3.

Figure 1: Block diagram of the EPC9509 wireless power amplier

IAMP P

AMP

VAMP

ICOIL

|ICOIL|

19V

SEPIC

Pre-Regulator ZVS Class-D

Amplier

Control Reference Signal

Combiner

Coil

3V –

52VDC

3. With power o, connect the control input power supply bus to 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 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 52 V).

7. 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.

8. 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.

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 4).

2. To maintain control stability, the red LED for voltage mode indicator on the EPC9509

version 1.0 has been disabled. This will be corrected in subsequent revisions of the

board. For questions regarding this LED function, please contact EPC.

3. AVOID using a Lab Benchtop programmable DC as the load for the device board. These

loads have low control bandwidth and will cause the EPC9509 system to oscillate at a

low frequency and may lead to failure. It is recommended to use a xed low inductance

resistor as an initial load. Once a design matures, a post regulator, such as a Buck

converter, can be used.

QUICK START GUIDE

Demonstration System EPC9509

Figure 2: Diagram of EPC9509 amplier circuit

Figure 3: Proper connection and measurement setup for the amplier board

AMP

Q1_a LZVS12

Q2_a

Q1_b

Q2_b

LZVS2

CZVS2

CZVS1

LZVS1

Coil

Connection

Single

Ended

Operation

Jumper

Pre-

Regulator

Pre-Regulator

Jumper

JP1

VIN

Bypass Mode

Connection

17-24 VDC

VIN Supply

(Note Polarity)

Source Coil

Connection

External

Oscillator

Switch-node Main

Oscilloscope probe

Switch-node Secondary

Oscilloscope probe

Ground Post

Voltage

Source Jumper

Disable Oscillator

Jumper

Disable Pre-Regulator

Jumper

Coil Current Setting

Timing Setting

(Not Installed)

Internal Oscillator

Selection Jumper

Pre-Regulator Jumper

Bypass Connection

Single Ended /

Operation Selector

Operating Mode LED

indicators

Ground Post

Supply Voltage

(0 V – 52 Vmax.)

Switch-node Pre-

Regulator

Oscilloscope probe

QUICK START GUIDE

Demonstration System EPC9509

Figure 4: Proper measurement of the switch nodes using the hole and ground post

Figure 5: ZVS timing diagrams

Do not use

probe ground

lead

Ground

probe

against

post

Place probe tip

in large via Minimize

loop

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

QUICK START GUIDE

Demonstration System EPC9509

Pre-Cautions

The EPC9509 demonstration system has a limited controller and no

enhanced protection systems and therefore should be operated with

caution. Some specic precautions are:

1. Please contact EPC at [email protected]om 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.

3. Never connect the EPC9509 amplier board into your VNA in an

attempt to measure the output impedance of the amplier. Doing so

will severely damage the VNA.

THERMAL CONSIDERATIONS

The EPC9509 demonstration system showcases the EPC2108 and

EPC2036 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 EPC9509 demonstration system has limited current protection only when

operating o 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.

Table 2: Bill of Materials - Amplier Board

Item Qty Reference Part Description Manufacturer Part #

1 3 C1_a, C1_b, C80 1 µF, 10 V TDK C1005X7S1A105M050BC

2 12 C2_a, C2_b, C4_a, C4_b, C35, C51,

C70, C71, C72, C77, C78, C81 100 nF, 16 V Würth 885012205037

3 3 C3_a, C3_b, C95 22 nF, 25 V Würth 885012205052

4 2 C5_a, C5_b DNP (100 nF, 16 V) Würth 885012205037

5 1 C20 DNP (1 nF, 50 V) Murata GRM155R71H102KA01D

6 1 C73 DNP (22 pF, 50 V) Würth 885012005057

7 1 R20 DNP (10k) Panasonic

ERJ-2GEJ103X

8 8 C6_a, C6_b, C7_a, C7_b, C31, C44,

C75, C82 22 pF, 50 V Würth

885012005057

9 4 C11_a, C11_b, C12_a, C12_b 10 nF, 100 V TDK C1005X7S2A103K050BB

10 4 C15_a, C15_b, C64, C65 2.2 µF, 100 V Taiyo Yuden HMK325B7225KN-T

11 1 C21 680 pF, 50 V Murata GRM155R71H681KA01D

12 1 C22 1 nF, 50 V Murata GRM155R71H102KA01D

13 2 C30, C50 100 nF, 100 V Murata GRM188R72A104KA35D

14 1 C32 1 nF, 50 V Murata GRM1555C1H102JA01D

15 1 C52 100 pF Murata GRM1555C1H101JA01D

16 2 C53, CR43 (on top of R43) 10 nF, 50 V Murata GRM155R71H103KA88D

17 2 C61, C62 4.7 µF, 50 V Taiyo Yuden UMK325BJ475MM-T

18 1 C63 10 µF, 35 V Taiyo Yuden GMK325BJ106KN-T

19 3 C90, C91, C92 1 µF, 25 V Würth 885012206076

20 2 Czvs1, Czvs2 1 µF, 50 V Würth 885012207103

21 3 D1_a, D1_b, D95 40 V, 300 mA

ST BAT54KFILM

22 10 D2_a, D2_b, D21, D40, D41, D42,

D71, D72, D77, D78 40 V, 30 mA

Diodes Inc. SDM03U40

23 3 D3_a, D3_b, D20 40 V, 30 mA Diodes Inc.

SDM03U40

24 2 D4_a, D4_b 5V1, 150 mW

Bournes CD0603-Z5V1

25 1 D35 LED 0603 Yellow

Lite-On LTST-C193KSKT-5A

26 1 D36 LED 0603 Green

Lite-On LTST-C193KGKT-5A

27 1 D37 LED 0603 Red

Lite-On LTST-C193KRKT-5A

28 1 D60 100 V, 1 A

On-Semi MBRS1100T3G

29 1 D90 40 V, 1 A

Diodes Inc. PD3S140-7

30 3 GP1_a, GP1_b, GP60 .1" Male Vert.

Würth 61300111121

31 1 J1 .156" Male Vert.

Würth 645002114822

32 1 J2 SMA Board Edge

Linx CONSAM003.062

33 6 J70, J75, JP1, JP50, JP70, JP71 .1" Male Vert.

Würth 61300211121

34 1 JMP1 DNP

35 1 L60 33 µH, 2.8 A CoilCraft MSD1278-334

36 1 L80 10 µH,150 mA Taiyo Yuden LBR2012T100K

37 1 L90 47 µH, 250mA Würth 7440329470

38 1 Lsns 110 nH CoilCraft 2222SQ-111JE

39 2 Lzvs1, Lzvs2 see addendum statement 390 nH CoilCraft 2929SQ-391JE

40 1 Lzvs12 DNP CoilCraft TBD

41 5 P25, P71, P72, P77, P78 10k, DNP (1k) Bournes, Murata 3266Y-1-103LF, PV37Y102C01B00

(continued on next page)

QUICK START GUIDE

Demonstration System EPC9509

Table 2: Bill of Materials - Amplier Board (continued)

Item Qty Reference Part Description Manufacturer Part #

42 2 Q1_a, Q1_b 60 V, 150 mΩ with SB EPC EPC2108

43 1 Q60 100 V, 65 mΩ EPC EPC2036

44 1 Q61 DNP (100 V, 6 A, 30 mΩ) EPC EPC2007C

45 3 R2_a, R2_b, R82 20 Ω Stackpole RMCF0402JT20R0

46 2 R3_a, R3_b 27k Panasonic ERJ-2GEJ273X

47 2 R4_a, R4_b 4.7 Ω Panasonic ERJ-2GEJ4R7X

48 1 R20 DNP (10k) Panasonic ERJ-2GEJ103X

49 1 R21 100k Panasonic ERJ-2GEJ104X

50 1 R25 7.5k Panasonic ERJ-2RKF7501X

51 1 R26 2k Panasonic ERJ-2RKF2001X

52 1 R30 100 Ω Panasonic ERJ-3EKF1000V

53 1 R31 51.0k 1% Panasonic ERJ-3EKF5102V

54 1 R32 8.2k 1% Panasonic ERJ-2RKF8201X

55 2 R33, R70 47k Panasonic ERJ-2RKF4702X

56 2 R35, R36 634 Ω Panasonic ERJ-2RKF6340X

57 1 R37 150k 1% Panasonic ERJ-2RKF1503X

58 2 R38, R91 49.9k 1% Panasonic ERJ-2RKF4992X

59 1 R40 196k Panasonic ERJ-3EKF1963V

60 1 R41 6.04k Panasonic ERJ-2RKF6041X

61 1 R42 24.9k Panasonic ERJ-2RKF2492X

62 1 R43 10.5k Panasonic ERJ-2RKF1052X

63 2 R44, R90 100k 1% Panasonic ERJ-2RKF1003X

64 1 R50 10 Ω Panasonic ERJ-3EKF10R0V

65 1 R51 124k 1% Panasonic ERJ-2RKF1243X

66 1 R52 71.5k 1% Panasonic ERJ-2RKF7152X

67 1 R53 1.00k

Panasonic ERJ-2RKF1001X

68 1 R54 0 Ω Yageo

RC0402JR-070RL

69 1 R60 40 mΩ, 0.4 W

Vishay Dale WSLP0603R0400FEB

70 1 R61 150 mΩ, 0.25 W

Vishay Dale WSL0805R1500FEA18

71 2 R71, R78 124 Ω

Panasonic ERJ-2RKF1240X

72 2 R72, R77 22 Ω

Panasonic ERJ-2RKF22R0X

73 2 R73, R75 10k

Panasonic ERJ-2GEJ103X

74 1 R80 2.2 Ω

Yageo RC0402JR-072R2L

75 1 R92 9.53k 1%

Panasonic ERJ-2RKF9531X

76 2 TP1, TP2 SMD Probe Loop

Keystone 5015

77 1 Tsns 10 µH, 1:1, 96.9%

CoilCraft PFD3215-103ME

78 2 U1_a, U1_b 100 V eGaN Driver National Semiconductor LM5113TM

79 1 U30 Power & Current Monitor Linear LT2940IMS#PBF

80 1 U35 DNP (Comparator) Texas Instruments TLV3201AIDBVR

81 1 U50 Boost Controller Texas Instruments LM3478MAX/NOPB

82 1 U70 Programmable Oscillator KDS Daishinku America DSO221SHF 6.780

83 2 U71, U77 2 In NAND Fairchild NC7SZ00L6X

84 2 U72, U78 2 In AND Fairchild NC7SZ08L6X

85 1 U80 Gate Driver with LDO Texas Instruments UCC27611DRV

86 1 U90 1.4 MHz, 24 V, 0.5A Buck MPS MP2357DJ-LF

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.

Addendum Statement; Ongoing testing of the EPC9509 revealed that the improvement in performance of the EPC2108 based design exceeded that of earlier design criteria and as such the design could further be improved to

increase eciency by changing Lzvs1 and Lzvs2 from 390nH (Coilcraft 2929SQ-391JEB) to 500nH (Coilcraft 2929SQ-501JEB).

QUICK START GUIDE

Demonstration System EPC9509

Figure 6: EPC9509 - ZVS class-D amplier schematic

19 V 1.5 A max

FD1

Local Fiducials

FD2 FD3

VIN

5 V

VOUT

GND

Icoil

PreRegulator

EP C9509PR_R1_0.SchDoc

VIN

5 V

VOUT

Pre-Regulator

SDM03U40

40V 30mA

D71

5 V

Deadtime A Fall

Deadtime A Rise

DNP (1k)P71

U71

NC7S Z00L6X

U72

NC7S Z08L6X

5 V

DSO221SHF 6.780

GND

OUT 3

O Ω

1VCC

U70

5 V

Oscillator

IntOsc

5 V

Logic Supply Regulator

VIN

OSC

.1" Male Vert.

JP70

Oscillator Disable

OSCIntOsc

.1" Male Vert.

J70

External Oscillator

Internal/External Oscillator

5 V

Deadtime B Rise

Deadtime B Fall

U77

NC7SZ00L6X

U78

NC7SZ08L6X

5 V

OSC

SDM03U40

40 V 30 mA

D72

DNP (1k)

P72

22 Ω

1 2

R72

SDM03U40

40 V 30 mA

D77

DNP (1k)

P77

SDM03U40

40 V 30 mA

D78

DNP (1k)

P78

OSC

H_Sig1

L_S ig1

H_Sig2

L_S ig2

OSC

.1" Male Vert.

JP71

.1" Male Vert.

J75

Mode

nSD

5 V

10k

R75

OutA

OUT B

ZVS Tank Circuit

.156" Male Vert.

VIN

Main Supply VAMP

VOUT

SMA Board Edge

DNP

JMP 1

Single-EndedOperation Only

Pre-Regulator Disconnect

TP 1

SMD probeloop

TP 2

VAMP

5 V

GND

LIN

OUTHIN

EP C9509_S E_ZVSclass-D_Rev1_0.SchDoc

390 nH

Lzvs1

390 nH

Lzvs2

DNP

Lzvs12

1µF 50 V

Czvs2

VAMP

5 V

GN D

LIN

OUTHIN

EPC9509_SE_ZVSclass-D_Rev1_0.SchDoc

VAMP

H_Sig1

L_Sig1

H_Sig2

L_S ig2

5 V

Jumper100

JP10

110 nH

Lsns

Coil Current Sense

100k

1 2

R21

680 pF, 50 V

C21

SDM03U40

40 V 30 mA

D20

EMPTY

SDM03U40

40 V 30 mA

D21

Icoil

124 Ω

1 2

R71

124 Ω

1 2

R78

10 nF, 50 V

C20

EMPTY

10 nF, 50 V

C22

10k

R73

47k

R70

10k

R20

EMPTY

100 nF, 16 V

C77

100 nF, 16 V

C78

100 nF, 16 V

C72

C71

22 pF, 50 V

C75

22 pF, 50 V

C73

EMPTY

1 µF, 25 V

C90

C92

1 µF 50 V

Czvs1

100 nF, 16 V

C70

Jumper100

JP72

.1" Male Vert.

JP1

OSC

Reg

0.81V

GND

DRV

CNTL

U90

MP2357DJ-LF

9.53k 1 %

R92

49.9k 1 %

R91

5 V

22 nF, 25 V

C95

47 µH 250 mA

L90

100k 1%

R90

VIN

D95

BAT54KFILM

PD3S140-7

40 V 1A

D90

1µF, 25 V 1µF, 25 V

C91

R26

22 Ω

1 2

R77

7.5k

R25

10k

P25

EMPTY

Current Adjust

10 µH 1:1 96.9%

Tsns

see

addendum

statement

see

addendum

statement

Addendum Statement; Ongoing testing of the EPC9509 revealed that the

improvement in performance of the EPC2108 based design exceeded that

of earlier design criteria and as such the design could further be improved

to increase eciency by changing Lzvs1 and Lzvs2 from 390nH (Coilcraft

2929SQ-391JEB) to 500nH (Coilcraft 2929SQ-501JEB).

QUICK START GUIDE

Demonstration System EPC9509

Figure 7: EPC9509 - Gate driver and power devices schematic

This schematic is repeated for each single-ended ZVS class D amplier.

5 VHS

5VHS

5 V

Gate Driver

LM5113TM

OUT

BAT54KFILM

5 V

4.7 V

20 Ω

SDM03U40

EMPTY Synchronous Bootstrap Power Supply

1 µF, 10 V

CD0603-Z5V1

Gbtst

27k

SDM03U40

22 nF, 25 V

GND

5 V

OUT

VAMP

OUT

2.2 µF 100 V

C15

10 nF, 100 V 10 nF, 100 V

C11 C12

VAMP

GND

HIN

LIN

HIN

LIN

ProbeHole

PH1

Ground Post

.1" Male Vert.

GP1

60 V 150 mΩ with SB

Q1A

EP C2108

Q1B

EPC2108

4.7 Ω

1 2

100 nF, 16 V

EMPTY

22 pF, 50 V

22 p

F, 50 V

QUICK START GUIDE

Demonstration System EPC9509

Figure 8: EPC9509 - Pre-regulator schematic

100k 1 %

R44

VIN

Isns

100 pF

C52

.1" Male Vert.

JP50

PreRegulator Disable

FA/SD

VOUT

VIN

Vsepic

5 V5 VGD

5VGD

GLPH

GLPL

Gate Driver

2.2 Ω

1 2

R80

GLPLGLPH

1 2

40 mΩ 0.4 W

R60

VIN

5 V

VOUT GND

PreDR PWM

71.5k 1 %

R52

124k 1 %

R51

5 V

10 nF, 50 V

100 nF, 16 V

C53

Ground Post

4.7 µF 50 V

C62

4.7 µF 50 V

C61

2.2 µF 100 V

C64

UVLO

Osc

PGND

1.26 V

Cnt

FA/SD

Comp

AGND

Isens

VIN

U50

LM3478MAX/NOPB

0Ω

1 2

R54

100 V 1A

D60

MBRS1100T3G

Vfd bk

VIN

Isns

1.24 V

CLR LE

V-

V+

I-

I+

VCC

GND

UVLC

LatchHi

CMPOUT

Pmon

Imon

CMP+

U30

LT2940 IMS#PBF

1 2

150 mΩ 0.25 W

R61

3EP

LDO VREF

VSS

1VDD

U80

UCC27611DRV

47k

1 2

R33

D36

D35

Current Mode

Power Mode

Pmon

Imon

Vsepic VOUT

634 Ω

1 2

R35 5 V

8.2k 1 %

R32

51.0k 1 %

R31

VOUT

V+

Vsepic

Pcmp

DC Power Monitor

Isns

Vfd bk

Pmon

Output Voltage Limit

Output Power Limit

Output Current Limit

SDM03U40

40 V 30 mA

D40

D41

SDM03U40

40 V 30 mA

24.9k

1 2

R42

Isns

2.2 µF 100 V

C65

10 µH 150 mA

L80

Isns

VOUT

Comp

100 Ω

1 2

R30

Icoil

100 nF, 100 V

C50

10E

1 2

R50

.1" Male Vert.

GP60

ProbeHole

PH60

20 Ω

1 2

R82

100 nF, 16 V

C81

100 nF, 100 V

C30

22 pF, 50 V

C44

22 pF, 50 V

C82

1 nF, 50 V

C32

22 pF, 50 V

C31

5 VGD

5VGD

1 µF, 10 V

C80

33 µH 2.8 A

L60

100 V 65 mΩ

Q60

EPC2036

EP C2007C

100 V 6 A 30 mΩ

Q61

GLPL

Pcmp

49.9k 1 %

R38

6.04k

R41

10.5k

R43

150k 1 %

R37

196k

1 2

R40

SDM03U40

40 V 30 mA

D42

TLV3201AIDBVR

U35

EMPTY 100 nF, 16 V

C35

D37

634 Ω

1 2

R36

5 V

Voltage Mode

Vfd bk

Vom

Pled

Iled

10 µF 35 V

C63

C51

1.00k

1 2

R53

Connect pin 1 to pin 5 (+5 V)

place a 10 nF across R43

Demonstration Board Notication

The EPC9509 board is intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it is not designed for compliance with the European

Union directiveon electromagnetic compatibility or any othersuch directivesor regulations. As board builds areat timessubject to product availability,it is possiblethat 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. No

Licenses are implied or granted under any patent right or other intellectual property whatsoever. EPC assumes no liability for applications assistance, customer product design, software