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INTRODUCTION
This easy-to-use kit provides a platform for the evaluation of PWM amplifier circuits using the SA07 pin-out. With ample breadboarding areas it is flexible enough to analyze a multitude of standard or proprietary circuit configurations. Critical connections for power supply bypassing, compensation and current limiting are pre-wired. Components not usually readily available in engineering labs are provided. External connection to the evaluation kit can be made via the terminals at the edge of the circuit board. These terminal pads are suitable for standard banana jacks or direct soldering of wires. The schematic is shown in Figure 1.
ASSEMBLY
See Figure 3. 1. Solder the surface mount ceramic capacitors to the DUT side of the circuit board at CVs and CVcc. 2. Select a current limiting resistor from the two values provided. See the product data sheet for information on how to select a value. Apply a thin coating of thermal grease to the back of the resistors. Press the resistor body onto the circuit board foil at positions Ra and Rb and solder the leads. 3. Assemble the amplifier, thermal washer and heat sink to the circuit board as illustrated in Figure 1. As a last step push the clip through the heat sink and circuit board until it locks. Solder the amplifier pins to the circuit side of the circuit board. 4. The four holes at the corners of the circuit board are for mounting #6 standoff spacers if desired. 5. Add other components as necessary to complete your application circuit.
PARTS LIST
Part # CLAMP02 HS21 EVAL18 TWO9 OX7R105KWN CRS01 CRS02 Description, Vendor Mounting clip, Apex Heat sink, Apex PC Board, Apex Thermal washer, Apex Capacitor, Novacap 1825B105K201N Resistor, Caddock MP725-0.10-1% Resistor, Caddock MP725-0.05-1% Quantity 1 1 1 1 Box/10 each 2 2 2
BEFORE YOU GET STARTED
* All Apex amplifiers should be handled using proper ESD precautions. * Always use thermal grease between the amplifier and heatsink. * 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.
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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EK07
FIGURE 1.
EVALUATION KIT FOR SA07 PIN-OUT
Figure 1 shows the schematic of the evaluation kit's pre-wired connections Components supplied with the kit are marked with an asterisk (*). All other connections are made via the bread-boarding areas of the circuit board.
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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EVALUATION KIT FOR SA07 PIN-OUT
EK07
FIGURE 2. Figure 2 shows a suggested simple test circuit that you can build to gain a familiarity with the evaluation kit as well as the amplifier. At the A OUT or B OUT pads relative to power ground you should observe a square wave with a frequency of approximately 500kHz, 30V p-p which is being modulated from approximately 0 to 100 % duty cycle at a rate of 1 Hz.
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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EK07
FIGURE 3. PCB
EVALUATION KIT FOR SA07 PIN-OUT

This data sheet has been carefully checked and is believed to be reliable, SHANNON ROAD * is assumed ARIZONA 85741 * omissions. All specifications are subject 1 (800) 546-2739 APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH however, no responsibility TUCSON, for possible inaccuracies orUSA * APPLICATIONS HOTLINE: to change without notice.
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EK07U REV C OCTOBER 2004
(c) 2004 Apex Microtechnology Corp.

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