ek27u

ek27u
EK27
Evaluation Kit
APPLICABLE PARTS (SOLD SEPARATELY)
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PA50
PA52
INTRODUCTION
This easy to use kit provides a platform with good circuit board layout and grounding to evaluate linear
power amplifier circuits using the PA50 / PA52 pin out. With additional prototype area, it is flexible enough to
analyze a multitude of standard or proprietary circuit configurations. All components are provided with the
kit. External connections to the evaluation kit can be made through the connectors at the edges of the circuit.
The circuit provides a line termination of 50 Ω.
The Power amplifiers are configured for a gain of 21. This evaluation kit provides flexibility for modifying
the gain, in inverting or non-inverting mode and for using a differential amplifier configuration.
Figure 1: PCB
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© Apex Microtechnology Inc.
All rights reserved
Dec 2015
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Figure 2: Schematic for Non-Inverting Amplifier
Figure 3: Assembled Schematic
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PARTS LIST
Reference
Manufacturer Part #
Description
RT
PR03000205109JAC00
51Ω, 3W, 5%
1
RIN-1, RIN-2
RN60D1801FB14
1.8KΩ, 1/4W, 1%
2
RFB1-B, RFB3-B
RN60D1802FB14
18KΩ, 1/4W, 1%
2
RIS0-1, RIS0-2
N/A
0Ω, Wire Jumper
2
EVAL29
Printed Circuit Board
1
CBP-1, CBP-3
SLP222M100C4P3
ALUM, 2200Uf, 100V
2
CBP-1’, CBP-3’
SLP681M200C7P3
ALUM, 680uF, 200V
2
ECW-F21055A
FILM, 1uF, 250VDC
6
D1, D2
1N4148-T
Switching Diode
2
D3, D4
MUR440 G
Rectifier, Ultra Fast
2
HS18
Heatsink
1
TW05
Thermal Washer (Pack Of 10 Pcs)
1
MS05
Socket
1
146510CJ
BNC Connector, PC Mount
1
91735A190
Screw, Panhead, #8 X 0.25”
4
91735A192
Screw, Panhead, #8 X 0.375”
4
91841A009
Nut, Hex, #8
4
8426
Spacer, Hex, With Stud, #8 X 0.375”
4
QTY
Resistors
Printed Circuit Board
EVAL29
Capacitors
CBP-2, CBP-4
CBP-5, CBP-6
CBP-7, CBP-8
Diodes
Hardware
8413
Spacer, Hex, With Stud, #6 X 0.375”
4
2221
Standoff, Hex, #8 X 2.00”
4
91735A151
Screw, Panhead, #6 X 0.75”
2
90730A007
Nut, Hex, #6 X 1/4”
2
TSO2
Terminal Strip
1
TFT20014 NA005-6”
Tubing, Teflon, #18AWG, 6 Inches
1
SPC02SVJN-RC
Jumper, Slip On
10
PRPC002SADN-RC
Header, Connector
10
5001
Test Point, Pc Mini
10
Miscellaneous
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BEFORE YOU GET STARTED
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•
•
•
•
•
•
All Apex Microtechnology amplifiers should be handled using proper ESD precautions.
Always use the heat sink and thermal washers 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
During the assembly, please refer to the circuit schematics, assembly drawings, and the data sheet of the part
being used on the evaluation kit.
1. Note that each side of the circuit board is identified as either the component side or the DUT side. The
component side has the designators printed on that side.
2. All the components are installed on the component side of the board and soldered on the DUT side.
3. First mount diodes D1, D2 and resistors RFB1, RFB3 on the component side of the board.
4. A power DIP socket (MS05) is supplied with this kit. The MS05 socket incorporates two cavities to retain
the #6 x 1/4” nuts (90730A007). Insert one #6 nut into each cavity. Make sure the nuts are fully seated into
the cavities. Using #6 x 0.75" screws (91735A151) provided with the kit, mount the socket from the DUT
side of the board.
5. Attach the heat sink to the board from the DUT side, using #8 x 0.375" screws (91735A192). Refer to the
assembly drawings for the correct way to attach the heat sink. This is done to keep the socket tightly
mounted to the board and to provide support, and eliminate stress so that the socket pins do not move
while being soldered from the component side. Once the socket pins are soldered, and the socket is now
attached to the board, remove the heat sink and all the screws.
6. First install all the smaller components on the board. This is done because it becomes difficult to install a
smaller part on the board once all the larger components are installed.
7. Mount electrolytic capacitors CBP-1 and CBP-2 for PA50. Mount capacitors CBP-1’ and CBP-2’ for PA52.
8. Ensure that the orientation of the electrolytic capacitors and the diodes match the circuit schematic
drawing.
9. Mount the BNC connector provided with the kit (146510CJ) and solder it to the board. Also mount the
terminal strip (TSO2) provided in the kit. Refer to the assembly drawings before mounting the terminal
strip. Make sure the terminal strip sits flat against the circuit board.
10. #8 hex stand offs (91841A009) are also provided with the kit. Install the # 8 x 0.25"screws (91735A190),
provided with the kit, from the component side. Attach the standoffs to these screws on the corners of
the board. Refer to the assembly drawings while installing the standoffs.
11. Attach the heatsink as before in step 5. Cut the Teflon tubing into 12 pieces, each of length 0.21 inches or
5.33 mm (1/5 of an inch) approximately. These pieces go onto the pins of the Power Amplifier before
inserting it into the socket. This is done to insulate the pins from the heat sink and make sure that the PA
is tightly fixed into the socket. An Exacto knife works well for this.
NOTE: The Teflon pieces should not be longer than the suggested length. If the pieces are longer, they
may interfere in the seating of the part to the heat sink and create a gap between the heat sink and the
part body.
12. Ten thermal washers (TW05) are provided with the kit. The thermal washer is used between the part and
the heat sink. A new washer must be used for each mounting. Mount the Power amplifier to the socket
using the thermal washer provided with the kit. Secure with the #6 screws. Note, the pin closest to the
input resistors (RIN1 and RIN2) is the pin #1 of the amplifier.
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13. Place jumpers J1 and J3 for a non-inverting amplifier. Connect X6 jumper.
14. Connect jumpers X9 and X10 to connect boost voltage and supply voltage.
15. Connect the external connections via the BNC connector and terminal strip. Hook up power supply and
signals as necessary. The amplifier is now ready for testing.
Figure 3 shows the schematic diagram for the assembled circuit.
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Figure 4: Top View
1
2
3
4
5
6
1.
2.
3.
4.
5.
6.
6
4 X #8 X 0.375” Screw
4 X #8 X 0.25" SCREW
2 X #6 Hex NUT
1 X MS03 SOCKET
4 X #8 X 0.375" HEX SPACER
4 X #8 HEX NUT
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Figure 5: Bottom View
7
8
9
7.
8.
9.
10.
4 X #8 X 2" HEX STANDOFF
1 X HS18 HEATSINK
1 X TW05 THERMAL WASHER
2 X #6 X 0.75" SCREW
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TEST ASSEMBLY
Equipment needed:
1. Power supply
2. Function Generator
3. Oscilloscope
4. Proper heat sinking system (if operating at high current)
TEST SETUP
Connect the power supply to the terminal strip. Connect the BNC cable from the function generator to
the BNC connector marked VIN, mounted on the board. Connect the load to the terminals on the terminal
strip. Refer to the amplifier datasheet for typical values of input voltage, frequency and supply voltage. Input
and output waveforms can be checked on an Oscilloscope by connecting it to the test points mounted on the
board. Begin the test with minimum values of input and supply voltage
NOTE: After everything is connected, switch on the power to the board, and check the socket at each pin
without the DUT, for correct voltage / signal at respective pin. Once this is done, plug in the DUT and check
for the correct signal.
TEST RESULTS
Figure 6 shows input (yellow waveform) and output (blue waveform) waveforms for a PA52 power
amplifier connected to a resistive load. The part was tested for an input voltage of 500mV p-p, at 10 kHz frequency. The supply voltage is set at ±20 Volts.
Figure 6:
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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 [email protected] 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 is
subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right
to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of
Apex 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 the
information 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.
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