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3. Solder the surface mount capacitors at C1, C4, C5, and C6
on the "component side" of the board.
4. Mount diodes at D1 and D2 and transorbs at D3 and D4
on the "component side" of the board (none supplied) as
needed by your application. See Application Note 1 para-
graphs 4.3 and 9.1.
5. Mount the electrolytic capacitors at C2 and C3 from the
"component side" of the PCB. Match the polarity markings
on the capacitor with the polarity markings on the PCB.
Be sure the capacitors have snapped into the PCB and
solder from the "DUT side" of the PCB. Be sure to fill the
holes with solder.
6. Low ohm value resistors are provided with this evaluation
kit: 0.050 ohm and 0.100 ohm. These are used to implement
current limiting in the output circuit. Select the value most
appropriate for your application. Refer to the product data
sheet to determine which resistor value you should use.
7. Mount the HS28 heat sink to the PCB and solder the mount-
ing tabs of the heat sink.
8. Apply a thin layer of thermal grease on the back of the
chosen current limiting sense resistor, insert the resistor
into the PCB and mount the resistor to the HS28 heat sink
using #4 screw and nut hardware (not supplied).
Be sure
to cut off the excess resistor lead lengths.
9. Mount the terminal strip to the "component side" of the PCB.
Make sure the terminal strip is fully seated and solder the
pins from the "DUT side" of the PCB. Be sure to fill the
mounting holes with solder.
10. Mount and wire the banana jacks and BNC connector
(neither supplied) to the PCB pads at locations 1-5 as
needed or desired.
11. Mount other components to complete your application
circuit using the pads and holes provided.
12. From the "DUT side" of the PCB snap the spacer- grom-
mets into the holes at the four corners of the PCB. Notice
that the holes are slightly rectangular and match the spacer-
grommet's long and short sides to the holes in the PCB.
13. Apply a thin, uniform layer of thermal grease to the amplifier;
a straight edge may be useful here. Position the amplifier
over the mounting holes in the heatsink. Firmly push the
amplifier onto the heatsink while slightly rotating the ampli-
fier back and forth, ending with the mounting holes of the
amplifier over the mounting holes in the heatsink.
14. Attach the amplifier to the heatsink with 4-40x½’ male-
female hex spacers (not supplied). These spacers serve
as alignment pins and aide in the assembly of the PCB to
the heatsink. Alternatively, use 4-40x¼’ machine screws
to mount the amplifier to the heatsink. Do not over-tighten
the spacers or screws as this provides no thermal benefit
and may break the hardware.
15. Place the PCB assembly on the heatsink/amplifier assembly
so that the hex spacers come through the aligning holes
near the corners of the amplifier location in the PCB. Care-
fully lower the PCB assembly until the pins of the amplifier
engage the cage jacks. Alternately, sight through the align-
ing holes in the PCB and match-up the PCB to the screws
Evaluation Kit for MP38CL and MP39CL
INTRODUCTION
This easy-to-use kit provides a platform for the evaluation
of linear power amplifiers circuits using the MP38CL-39CL
pin- out. With ample bread boarding areas it is flexible enough
to analyze a multitude of standard or proprietary circuit con-
figurations. Critical connections for power supply bypassing
are pre-wired. Components not usually readily available in
engineering labs are provided. External connection to the
evaluation kit can be made via the terminal block and terminal
pads at the edges of the circuit board. The terminal pads are
suitable for soldering standard banana jacks or direct wiring
of wires. Additionally, banana jacks and a BNC connector can
be inserted into the holes at the edge of the board and wired
to the numbered terminal pads.
BEFORE YOU GET STARTED
• All Apex Precision Power amplifiers should be handled using
proper ESD precautions.
• Do not change connections while the circuit is powered.
• Initially set all power supplies to the minimum operating
voltage allowed in the device data sheet.
PARTS LIST
Ref
NA
NA
NA
NA
NA
C1-4
TS1
C2,3
R
LIM
*
R
LIM
*
Apex Part #
HS28
HS18
MS11
EVAL59
60SPG00004
OX7R105KWN
TS02
EC03
CSR18
CSR19
Description/Vendor
Qty
Heat Sink
1
Heat Sink
1
Strip of 30 cage jacks
1
PC Board
1
Spacer Grommets/
4
Micro Plastics
1uF Cap/
4
Novacap
1825B105K201N
Terminal Strip
1
680uF 200V/
2
United Chemi-Con
KMH200VN681M25MX40T 2
0.050 Ohm Resistor/
1
Isotek PBV-R050-1
0.100 Ohm Resistor/
1
Isotek PBV-R100-1
ASSEMBLY
During assembly refer to Figure 1 and the data sheet for the
MP38CL & MP39CL.
1. Note that each side of the circuit board is identified as either
the "component side" or "DUT side".
2. Cut the MS11 into groups of 14 and 16 cage jacks and insert
from the "DUT side" of the board. On the "component side"
of the board, solder all cage jacks having solder pads (3,
5, 7-11, 21, 22, and 27 have no solder pads). Make sure
the cage jacks are fully seated before soldering. Be careful
that solder does not flow into the cage jacks. Remove the
unsoldered cage jacks with the carrier strip segments.
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1
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−
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ASSEMBLY CONT.
P r o d u c t I n n o v a t i o nF r o m
used to mount the amplifier. In either case be sure the pins
of the amplifier are engaged with the cage jacks and then
continue pushing the PCB assembly in the area between
the amplifier’s pins until the four spacer grommets at the
four corners of the PCB touch the heatsink. At this point
the PCB should not be bowed.
16. Use #8 X 1" sheet metal screws (not provided) to mount
the PCB to the heat sink at the four spacer-grommets.
FIGURE 1: SCHEMATIC DIAGRAM
17. Inspect the assembly from the side and check that the PCB
is not bowed toward the heat sink. If the PCB is bowed use
a small tool to carefully pry the PCB away from the heat
sink until the PCB is flat.
18. Hook up power and signals as necessary. The amplifier
is now ready for testing.
PCB AMPLIFIER TERMINALS
PCB WIRING TERMINALS
D4
C1
1
C5
C2
+
TERMINAL STRIP TERMINALS
ASSESSORY TERMINALS
2
TS1
2
1
+Vb GND
3
4
CC2
5
6
7
8
NC
9
NC
10
NC
CC1 NC
14
NC +Vs +Vs +Vs
11
12
13
SPARE
D1
+Vs
+Vb
-Vb
26
IQ +Ilim -Ilim
25 24 23
22
21
-Vs
20
-Vs -Vs
19 18
D2
17 16 15
OUT OUT OUT
OUT
GND
-Vs
-Vb
3
-IN
30
+IN GND NC
29 28 27
VIEW FROM PCB COMPONENT SIDE
4
5
C6
+
C3
C4
D3
R
LIM
2
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P r o d u c t I n n o v a t i o nF r o m
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ContACting CiRRUs LogiC sUPPoRt
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@cirrus.com.
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. 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.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD-
UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS-
TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
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