APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
INTRODUCTION
This easy-to-use kit provides a platform for the evaluation of
PWM amplifiers using the SA13 or SA14 pin-out configuration. It
can be used to analyze a multitude of standard or proprietary circuit
configurations, and is flexible enough to do most standard amplifier
test configurations. The board is designed for surface mounting all
components except the switching amplifier.
The schematic is shown in Figure 2. Note that all of the compo-
nents shown on the schematic will probably not be used for any
single circuit. Some components will simply be omitted, while others
require installation of a jumper to complete the signal path.
Only components unique to the EK10 are provided in this kit.
Hardware similar to that shown in figure 1 must be obtained locally.
PARTS LIST
Part #
Description
Quantity
HS18
Heatsink
1
MS04
PC mount Cage Jacks
1 Bag/12 each
EVAL 09
PC Board
1
60SPG00001
Spacer Grommets
4
TW05
Thermal Washer
1 Box/10 each
OX7R105KWN
1
F Cap 1825B105K201N,
6
Novacap
BEFORE YOU GET STARTED
*
All Apex amplifiers should be handled using proper ESD precau-
ASSEMBLY
(See Figure 1)
1. From the non-silk screen side, insert and solder cage jacks. Be
sure each one is fully seated.
2. From the non-silk screen side, push spacer grommets into PC
board until fully seated. Grommets will snug when screws are
inserted for heatsink mounting.
3. Apply TW05 thermal washer to the bottom of the SA13 or SA14.
4. Use #14 sleeving to insulate and align at least 2 opposite pins of
the amplifier.
5. Mount amplifier to heatsink using #6 screws and nuts. Torque the
part to the specified 8 to 10 in-lbs (.9 to 1.13 N*M). Do not over
torque.
6. Install components as needed. External connections may be
soldered directly or standard banana jacks may be soldered to
these pads.
7. Insert amplifier pins into cage jacks and fasten board to heatsink.
tions.
*
Always use the heatsink included in this kit with TW05 washer.
*
Always use adequate power supply bypassing.
*
Do not change connections while the circuit is powered.
*
Initially set all power supplies to the minimum operating levels allowed in the device data sheet.
*
Check for oscillations.
Heatsink
Switching Amplifier
Hex Nut 6-32 THD 1/4"
#8 or #10 Screw (1/2" - 3/4" LG)
Spacer Grommet
6-32 x 1/2 Lg. Screw
TW05 thermal washer
PC Board (Silkscreen side)
FIGURE 1.
Cage Jack
Solder as required
H T T P : / / W W W . A P E X M I C R O T E C H . C O M ( 8 0 0 ) 5 4 6 - A P E X ( 8 0 0 ) 5 4 6 - 2 7 3 9
M I C R O T E C H N O L O G Y
EVALUATION KIT FOR SA13/SA14 PIN-OUT
EK10
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
EK10
EVALUATION KIT
FOR SA13/SA14 PIN-OUT
FIGURE 2. PCB SCHEMATIC.
A block diagram for both the SA13 and SA14
is shown in Figure 2 along with pcb connections
of all the commonly used external components.
Your application circuit will not use all of the
components. Add those components required
by your circuit. You may have to jumper some
components to make the desired electrical con-
nections. J1 is an optional way to connect the
clock circuit. Power supply bypassing is par-
ticularly important and that is why high quality
ceramic chip capacitors are supplied with the
kit. In addition you may need to add a 10-50 uF
or larger capacitor on the +Vs pin. This addi-
tional capacitor needs to be rated for switching
operation. Note that the signal ground and
power ground are separated and tie together
only at the ground pin (5). A breadboarding
area is supplied which can accomodate 1 or 2
IC amplifiers and associated components. The
large terminal pads can be used to solder wire
connections or banana jacks.
Note that the EK10 Evaluation Kit uses the
same circuit board as the EK03 Evaluation kit
intended for the Apex models SA03 and SA04.
The SA13 and SA14 are half bridge versions of
the SA03 and SA04 and are indentical in design
except for that fact. Some of the pin designa-
tions of the SA13 and SA14 are, however,
different. The SA13 and SA14's OUT (PIN 8)
are equivalent to the SA03 and SA04's B OUT
(PIN 8). The SA13 and SA14's PWR GND (PIN
7) are equivalent to the SA03 and SA04's
I SENSE B (PIN7). Pins 11 and 12 of the SA13
and SA14 are not connected. The designations
on the PCB are those used for the SA03 and
SA04. See the SA13 or SA14 data sheet for
specific operating considerations.
SA13/SA14
*
Input protection, 10V zener diode.
*
*
*
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
EVALUATION KIT
FOR SA13/14 PIN-OUT
EK10
FIGURE 3. FUNCTIONAL TEST CIRCUIT
The schematic of Figure 3 can be used to
verify the functionality of your amplifier and help
you gain a familiarity with proper operation. At
Out, with respect to ground, you should ob-
serve a square wave approximately 30 V in
amplitude with a fixed frequency and duty cycle
that varies from approximately 0 to 100% at a
rate of 1 Hz.
SA13/SA14
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
EK10
FIGURE 4. PCB COMPONENT SIDE
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
EK10U REV. B JANUARY 1998
1998 Apex Microtechnology Corp.
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