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EK17

EVALUATION KIT FOR SA12 PWM AMPLIFIER

Apex Microtechnology 

EK17

EVALUATION KIT

FOR SA12 PWM AMPLIFIER

ASSEMBLY

FIGURE 2. PCB

During assembly refer to Figures 1 & 2 ��������

1. From the DUT of the PCB insert and

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solder the 12 cage jacks. Also solder

the cage jacks from the circuit side

as well, making sure the cage jack

remains flush with the component side

of the PCB.

2. Solder the 3 surface mount ceramic

capacitors to the component side of

the PCB.

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3. From the component side of the PCB

insert the terminal strip. Solder from the

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circuit side of the PCB. Be sure that ��

the GND terminal hole in the PCB is

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fully filled with solder.

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4. Two values of current limiting power

resistors are supplied. Select one

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value (see the amplifier data sheet to

learn how to calculate which resistor

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will suit your need). Coat the backside

of the power resistor with heat sink

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compound (not supplied). Using 4-40

screws and nuts (not supplied) mount

the resistors to the two small heat sinks

supplied. Solder the resistor/heat sink

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assembly to the component side of the

PCB.

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5. Insert the electrolytic capacitor into

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the PCB from the component side and

solder from the circuit side making sure

to fill the mounting holes with solder.

6. From the circuit side, push spacer

grommets into PCB until fully seated.

Grommets will snug when screws are

inserted for heatsink mounting.

7. Apply TW05 thermal washer to the

bottom of the amplifier.

8. Use #14 sleeving to insulate and align

at least 2 opposite pins of the ampli-

fier.

9. 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.

10. Install components as needed. Ex-

ternal connections may be soldered

directly or standard banana jacks may

be soldered to the large pads at the

edge of the PCB.

11. Insert amplifier pins into cage jacks

and fasten PCB to heatsink.

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739

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