EK03

EK03 EK03 EK03 SA03 Evaluation Kit for SA03 Pin-Out INTRODUCTION This easy-to-use kit provides a platform for the evaluation of PWM amplifiers using the SA03 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 1. 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 EK03 are provided in this kit. Hardware similar to that shown in figure 4 must be obtained locally. A block diagram of the amplifier is shown in Figure 1 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 connections. J1 is an optional way to connect the clock circuit. Power supply bypassing is particularly 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 additional 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. FIGURE 1. PCB SCHEMATIC. SA03 * * * * Input protection, 10V zener diode. www.apexanalog.com EK03U Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved) MAR 2015 1 EK03U REVI EK03 The schematic of Figure 2 can be used to verify the functionality of your amplifier and help you gain a familiarity with proper operation. At either A Out or B Out, with respect to ground, you should observe 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. The current limit is set to 2 amps. FIGURE 2. FUNCTIONAL TEST CIRCUIT SA03 2 EK03U EK03 FIGURE 3. PCB TOP SIDE SPARE Vcc +Vs B OUT A OUT I SENSE A I SENSE B EK03 12 7 R1 R2 CVs CVcc EVAL09 Ra Rb 1 SIG GND SIG GND R3 ILIM/ SHDN SIG GND -PWM/ RAMP 4.686 J1 C3 C1 PWR GND R4 C2 +PWM CLK OUT CLK IN 5.500 BOTTOM SIDE 1 EK03U 3 EK03 PARTS LIST Reference Manufacturer Part # Description Qty EVAL09 PRINTED CIRCUIT BOARD 1 CVs 1825RB105K201N 1uF,200V CAP –NOVACAP 5 CVcc 1825RB105K201N 1uF, 200V CAP-NOVACAP 1 HS18 HEATSINK 1 TW05 THERMAL WASHER (PACK OF 10 PCS) 1 MS04 PC MOUNT CAGE JACKS (PACK OF 12 PCS) 1 60SPG00001 SPACER GROMMETS 4 Printed Circuit Board: EVAL09 Capacitors: Hardware: BEFORE YOU GET STARTED * * * * * * * The SA03 is not included with the EK03 Kit and must be purchased separately. All Apex Microtechnology amplifiers should be handled using proper ESD precautions. 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. ASSEMBLY 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 amplifier. 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. 4 EK03U EK03 PC Board (Silkscreen side) Cage Jack Solder as required Spacer Grommet 6-32 x 1/2 Lg. Screw TW05 thermal washer Heatsink #8 or #10 Screw (1/2" - 3/4" LG) FIGURE 4. Switching Amplifier Hex Nut 6-32 THD 1/4" NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. 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. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks of their respective holders. www.apexanalog.com EK03U Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved) MAR 2015 5 EK03U REVI