EK84
Evaluation Kit
APPLICABLE PARTS•SA111PQ

INTRODUCTION
This easy to use kit provides a platform with good circuit board layout and grounding to evaluate theSA111. The evaluation board provides a flexible prototyping area which can be used to connect the SA111 toadditional external circuitry for providing input PWM to the SA111. All necessary components are provided
with the evaluation kit. External connections to the evaluation kit can be made through the connectors at theedges of the circuit. The circuit provides a line termination of 50Ω for input signals provided through a function generator.
All specifications listed in the SA111PQ datasheet apply to this PCB.
Figure 1: Circuit Diagram (Main PCB/EVAL111)

SA111PQ (Adapter Board)+VS

USES HS36 HEATSINK
TP8-1

CBP11uF

0.1uF

TP9-1

1000V

OUT

OUT
GREEN
D1

J101000V

CSNB
1000V

+VCCL

2220+VS+VS

22

DGND

RS310.01 Ohm
RS

VR32

DGND

1

DGND

3INL

R1430K
CBP2
X7R
0.1uF
1kV
1812

CBP30.47uF
1kV
2220

CBP50.47uF
1kV
2220

1 CBP62

D3400V

1200uF

R2430K

1 CBP71200uF
2R3430K

1 CBP81200uF
2J5J6
GND
BLACK

TP6-1

GND

D4400V

2JP4

TP4-14DNP
2512

1P6KE24A

1POWER+VSRED

1RSNB

JP3INH

RS421

D6400V

2DGND

1VR4

DGND

TP5-1

2

D5USES HS28 HEATSINK

2DGND
TP3-1

J4
INL

+VS

OUT

TP17-1

1

RS2
VR2J3
INH

GND

$$$15893

ENA
DGND

TP10-1

DGND

+VS

JP2

TP2-1

GND
BLACK

DGND

+VCCL

J2ENA

-VS

GND

INL
INL-1

DGND

DGND

+VCCL

INH

DGND

INH-1

TP13-1

TP7-1ENA

BLACK

ENA-12J7DGND

OUTPUTJ92246810121416182022242628

D21

CBP4J1A

SW-114-01-T-D

ORANGE

J1B

13579111315171921232527

J8
VCC

10987654321

SSW-110-01-T-S

VCC

1+VCCLDO NOT POPULATE
X1X2X3TP12-1DGND
HS28RT1515%HEATSINK , HS28

RT2515%VR

J11

For current sense resistor RS

GND
BLACK

STAR POINT
TP11-112

X4TESTPOINTS

DGND

TP16-1

TP14-1

TP15-1

TP1-1

DGND

DGND

DGNDDGND

XMH4-1

XMH2-1

XMH1-1www.apexanalog.com

XMH3-1

MTG. HOLES

43HS36HEATSINK , HS36
For PQ package

GND

DGND

18-AWG
DGND

VR
J12OUT
WHITE

RT3515%© Apex Microtechnology Inc.
All rights reserved

May 2024
EK84U Rev B

EK84
Daughter Card

Snubber network installed on connector side
RSNB

TP6-1

DNP
2512

-VS

TP3-1

TP2-1

GND
VCC_LS

N/C

IN_LS

N/C

IN_HS

N/C

ENA

TP4-1
VCC_HS

C1
X7R
1uF
120650V

VREG

C2
X7R
1uF
1206
50V

RB

3.3251222

TSM-110-01-T-SV_CONN

RS1MDFQ-13
DB
1N/C

1000V

N/C

12345678910111213NC
NC
NC
U1GND
VCC_LS
VREG
IN_LS
IN_HS
ENA
NC
NC
ENA - NC - NC - NC - VCC_HS
NC
VCC_HS

SA111PQ

OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT

P2393837363534333231302928
27+VS+VS+VS+VS+VS+VS+VS+VS+VS+VS+VS+VS+VS

C6
X7R
0.1uF
1000V
1812

TP5-1

14151617181920212223242526

TP1-112345678910

OUT-VS-VS-VS-VS-VS-VS-VS-VS-VS-VS-VS-VS-VS01206

P1TP7-1

181252515049484746454443424140

J1CSNB

C3X7R
0.1uF
1000V
1812

C4X7R
0.47uF
2220
1000V

C5X7R
0.47uF
2220
1000V

1
35
7
91113151719212325
27

2
468
1012
14161820222426
28

TSM-114-01-T-DV+VS-VS+VS

EK84U Rev B

EK84
Figure 2: PCB Layout
Composite (DUT Side (Bottom Side) + Top Side)
7.5 [190.5]

6.0 [152.4]

5.5 [139.7]

7.0 [177.8]

Notes:
1. View from Top Side
2. All measurements in inch [mm]3. All components on the top side, except connectors J1A, J1B and HS36

Component Side (Top Side)

EK84U Rev B

3

EK84
Top Metal Layer

Bottom Metal Layer

4

EK84U Rev B

EK84
PARTS LIST
Reference

Manufacturer Part #Description

QTY

EVAL111

Printed Circuit Board

1

PR01000105109JR500
MBB02070C4303FCT00
Not included, User defined51Ω, 1W, 5%
RES 430K OHM 1% 0.6W AXIAL
Resistor, SMD, 2512 size, 1000V

331Printed Circuit Board
EVAL111

Resistors
RT1, RT2, RT3
R1, R2, R3
RSNBCapacitors
CBP1C1210V104KCRACTU

CBP2C1812C104KDRACAUTO

CBP3, CBP5

2220Y1K00474KXTWS20.1 µF ±10% 500V, Ceramic Capacitor
X7R 1210 (3225 Metric)
0.1 µF, ±10% 1kV Ceramic Capacitor
XR7 1812
0.47 µF, ±10% 1kV Ceramic Capacitor
XR7 2220

CBP4
CBP6, CBP7, CBP8CSNB

C5750X7R2E105K130KA
380LX122M400A082
Not included, User defined

1 µF, 500V, Ceramic Capacitor
CAP, ELEC 1200 µF, 400V
Capacitor, SMD, 2220 size, 1000V

131Diodes
D1, D2

MUR4100EG

Diode, GEN PURP 1000V 4A DO201AD

2D3, D4, D6
D5MUR440RLG
P6KE24A

Diode, GEN PURP 400V 4A
TVS Diode 20VWM 42.8VC DO1531J1A
J1B
J2, J3, J4
J5
J6, J7, J10, J11
J8J9
TP1-TP17
X1, X2, X3
X1, X2, X3
HS28
RS

EK85-1
SSW-114-01-T-D
SSW-110-01-T-S
146510CJ
108-0902-001
108-0903-001
108-0906-001
108-0904-001
5001
PRPC002SAAN-RC
SPC02SVJN-RC
HS28
CSR20

Daughter Evaluation Card for SA111
CONN RCPT .100” 28POS DUAL TIN
CONN RCPT .100” 10POS SNGL TIN
BNC CONN RT ANGLECONN, BANANA, SMT, RED
CONN, BANANA, SMT, BLACK
CONN, BANANA, SMT, ORANGE
CONN, BANANA, SMT, GREENTEST POINT MINI .040 DIA.
2-POS HEADER .100 SP
JUMPER, SLIP ON
Heatsink for current sense resistor RS
Resistor, 10 mOhm, 10W

11131411
16
3
3
1
1

J12108-901-001

CONN, BANANA, SMT, WHITE

191735A190

Screw, Panhead, #8 X .25”

491249A126

4-40 Thread Size, 1-1/2” Long

494758A101

18-9 Stainless Flange Nut, 4-40

4142Hardware

EK84U Rev B

5EK8462221

Standoff, HEX, #8 X 2.00”

491772A110

Screw Pan head, #4

196537A130

18-8 stainless steel Hex Nut

1EK84U Rev BEK84
BEFORE YOU GET STARTED
•••••
••

All Apex Microtechnology amplifiers should be handled using proper ESD precautions.
Always use the heat sink included in this kit.
Always use adequate power supply bypassing.
Do not change the connections while the circuit is powered.
Initially set all power supplies to the minimum operations levels allowed in the device data sheet.
Check for oscillations.
Please refer to Application Note, AN01 for general operating conditions.

ASSEMBLY INSTRUCTIONS
During the assembly, please refer to the circuit schematics, assembly drawings, and the data sheet of thepart being used on the evaluation kit.
1. All surface mount components should be placed on board first. These include CBP1 through CBP5(CSNBand RSNB can also be installed at this point if they have already been chosen and procured by user).
2. All through hole components are to be installed on the component side of the board and soldered on thebottom(DUT) side, except for the mating sockets which are inserted on the bottom(DUT) side an then soldered from the component side. Do not solder CBP6, CBP7 or CBP8 yet. When completing this step,
install all small through hole components like capacitors, resistors, and test points on the PCB first. This isdone because it becomes difficult to install a smaller component on the board once all the larger components are installed. When cutting the excess lead lengths of the various through hole resistors, save oneof the pieces of lead wire in order to use for the X4 designator shorting connection which creates a star
point ground.
3. Insert the mating sockets on the DUT side of the board. Once they are inserted, solder the mating sockets
from the top side of the board.
4. Install diodes D1, D2, D3, D4 and D5 on the evaluation board. Ensure that the orientation of the components match the circuit schematic drawing.
5. Mount the BNC connectors(J2 – J4) provided with the kit (part #146510CJ) and solder them to the board.
Also mount the banana jacks(J5 – J12) on the board.
6. From the DUT side of the PCB, insert #8 panhead screws into the holes at the four corners of the PCB.
Connect the hexagonal standoffs from the bottom side of the board.
7. Mount the current sense resistor RS on heat sink HS28 using #4 round head screw and 4‐40 hex nut.
Install the heatsink + resistor assembly on the PCB.
8. Once all the components are mounted on the EVAL111 PCB, mount the EK85-1 daughter card subassembly, which has the SA111 unit attached to a heatsink(HS36), into the mating sockets on the EVAL111 PCB
on the DUT side.
9. After mounting the EK85-1 on EVAL111, use 91249A126 (4-40 thread, 1.5” long) screws through EVAL111
to hold EK85-1 assembly in place. 4-40 flange nuts are provided for these screws.
10. Connect the external connections via the BNC connector and banana jacks. Hook up power supplies andsignals as necessary. The amplifier is now ready for evaluation.

EK84U Rev B

7

EK84
CIRCUIT DESCRIPTION
The EK84 evaluation kit is designed to drive the SA111 in a singly supply operation where the ‐VS pin is connected to ground through a current sense resistor. If necessary, RSNB and CSNB can be chosen by the user
based on given output conditions to enhance stability. If RSNB and CSNB are used in circuit, be sure that thecomponents chosen are rated for 1kV or more. Input pulses can be provided via BNC connectors on the edgeof the board. However, one can use a microcontroller to provide input PWM pulses to the EK84 evaluation
kit. The flexible prototyping area can be used in this case. Connections from the microcontroller can be madethrough the INH, INL and ENA through holes provided on the board. If a microcontroller is used, remove
jumpers X1, X2 and X3 so that the termination resistors do not load the microcontroller.

HEATSINK MOUNTING DIAGRAMFIGURE 3(EK85-1)
Top View

Side View(s)8

EK84U Rev B

EK84
TEST ASSEMBLY
EQUIPMENT NEEDED
1.
2.
3.
4.

Power Supplies
Digital Multimeter
Oscilloscope
Proper Device Heatsinking

TEST SETUP
1. Connect the power supply to +VS port. Refer to product datasheet for voltage specifications.
2. Connect BNC cables from the function generators or connect a micro controller to the inputs of theSA111.
3. Connect a 5V power supply to the ENA input connection.
4. Do not insert the part yet. Next, power on the input signal and power supplies.
5. Measure voltages on all pins on the DUT side to ensure that there is not a short and to check that all thepins read correct voltages.
6. Mount the amplifier + Heatsink assembly on the PC board.
7. Input and output waveforms can be checked on an Oscilloscope by connecting it to the test points
mounted on the board.
8. Begin the test with minimum values of switching frequency and supply voltages.

NEED TECHNICAL HELP? CONTACT APEX SUPPORT!

For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For
inquiries via email, please contact apex.support@apexanalog.com. International customers can also request
support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you,go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information issubject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the rightto make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property ofApex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask
work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with theinformation contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex
Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not extend to other copying such as copying for
general distribution, advertising or promotional purposes, or for creating any work for resale.
APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE
SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE
FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnology, Inc. All other corporate names noted herein may be
trademarks of their respective holders.

9EK84U Rev B