APEX EK01

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INTRODUCTION
ASSEMBLY
This easy-to-use kit provides a platform for the evaluation of
PWM amplifiers using the SA01 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
components 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 EK01 are provided in this kit.
Hardware similar to that shown in figure 1 must be obtained locally. The PC board and the foot print of the heatsink measure
3" by 5".
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 TW10 thermal washer or a thin, even coat of thermal
grease to the bottom of the SA01. If grease is from a tube
make sure there is no sign separation of solids and liquids.
If from a jar, stir it prior to application.
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. 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.
PARTS LIST
Part #
HS16
MS04
EVAL07
60SPG00001
TW10
Description
Heatsink
PC mount Cage Jacks
PC Board
Spacer Grommets
Thermal Washer
Quantity
1
1 Bag/12 each
1
4
1 Box/10 each
BEFORE YOU GET STARTED
*
*
*
*
*
*
*
All Apex amplifiers should be handled using proper ESD precautions.
Always use the heatsink included in this kit with thermal grease.
Torque the part to the specified 8 to 10 in-lbs (.9 to 1.13 N*M)
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.
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FIGURE 1.
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
1
EK01
EVALUATION KIT
FOR SA01 PIN-OUT
FIGURE 2. PCB SCHEMATIC.
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TYPICAL COMPONENT FUNCTIONS
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12, 13, 15, 16
R14
R17
C1
C2
C3, 4
C5
C6
C7
C8
C9
C10, 11
C12
C13
D1 – D4
D5 – D7
Provides -IN bias from the Reference voltage.
Sets DC scaling for external feedback such as tachometers, position sensors or current sensors.
With R4 sets DC operating point of +IN, with R13 and R15 sets gain of voltage feedback circuit.
With R3 sets DC operating point of +IN.
Input scaling of the control signal.
With C6 sets the corner frequency of the integrator.
With C3 & C4 forms a low pass filter for the external feedback loop. Often used with tachometers.
With C2 forms a low pass filter for the current limit circuit.
Current sense. Often is a piece of resistance wire.
With R8 divides shutdown signal voltage feeding SHDN/FILTER pin.
With C5 sets corner frequency for external feedback loop.
Provides voltage feedback for a voltage controlled output.
Helps set gain or scale input voltage levels.
With C12 provides low pass filtering of +IN signal.
Power supply bypass.
With R8 form a low pass filter for the current limit circuit, also filters the SHDN signal.
With R7 forms a low pass filter for the external feed back loop. Often used with tachometers.
With R11 sets corner frequency for external feedback loop.
With R6 sets the corner frequency of the integrator.
Power supply bypass, must have very low ESR in MHz range.
Filters reference or feedback voltage at +IN.
Bypass for the reference voltage.
With R15 and R16 provides low pass filtering of voltage feedback.
With R17 provides low pass filtering of +IN signal.
Provides AC coupling of +IN signal.
Optional flyback diodes.
Input protection zener diodes.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
EK01
EVALUATION KIT
FOR SA01 PIN-OUT
FIGURE 3. PCB
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OPEN LOOP OPERATION
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
3
EK01
COMMON
CONFIGURATIONS
VOLTAGE CONTROL
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POSITION CONTROL
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SPEED CONTROL
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This data
sheet has been carefully CORPORATION
checked and is believed
to be NORTH
reliable, however,
no responsibility
assumed for
possible inaccuracies
omissions.
All specifications HOTLINE:
are subject to1change
without
notice.
APEX
MICROTECHNOLOGY
• 5980
SHANNON
ROAD • is
TUCSON,
ARIZONA
85741 •orUSA
• APPLICATIONS
(800)
546-2739
4
EK01U REV E DECEMBER 2004
© 2004 Apex Microtechnology Corp.