EK19

EK19 Evaluation Kit APPLICABLE PARTS (SOLD SEPARATELY) • • PA94 PA95 INTRODUCTION This easy-to-use kit provides a platform for the evaluation of linear power amplifiers circuits using the PA94/PA95 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. Figure 1: Schematic Figure 1 shows the schematic of the evaluation kit's pre-wired connections. Components supplied with the kit are marked with an asterisk (*). See the amplifiers data sheet for full application information. www.apexanalog.com © Apex Microtechnology Inc. All rights reserved Nov 2021 EK19U Rev F EK19 Figure 2: PCB DANGER HIGH VOLTAGE HS27 GND +Vs -Vs OUT IN 2 IN 1 AUX 2 AUX 1 TOP SIDE D3 D4 1 1 D1 D2 R6 J1 GND R4 RLIM C4 3.37 Rc Cc R2 C2 R5 IC 12 C1 R3 R1 GND MICROTECHNOLOGY EVAL23 RCOMPONENT & DUT SIDE 4.65 BOTTOM SIDE CIRCUIT SIDE EVAL23 12 1 2 EK19U Rev F EK19 PARTS LIST Reference Manufacturer Part # Description QTY HS27 EVAL23 TW13 Heatsink PC Board Thermal Washer 1 1 1 Box (10 each) D3, D4 P6KE440A TransZorb 2 C1, C2 C322C103JDRA5TA Capacitor 0.01µF 1kV 2 ASSEMBLY 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. See Figure 2. Insert and solder the TransZorb diodes at D3 and D4 (440V). Insert and solder the disc bypass capacitors at C1 and C2. Insert the HS27 heatsink and solder the solderable studs from the opposite side of the PCB. Add banana jacks as necessary to complete connections to external circuits and power supplies. Insert the amplifier into the PCB mounting holes located in the space between the heatsink fins. Do not solder the pins at this time. Hang the TW13 thermal washer near the end of a 6-32 X 3/8" screw. Slightly pull the amplifier away from the heat sink face. Use the screw to position the thermal washer behind the amplifier and insert the screw into the mounting hole of the heatsink. Use a 6-32 nut to secure the screw from the opposite side of the heatsink. It is important that the entire back surface of the amplifiers mounting tab be in contact with the heatsink. Adjust the amplifiers position and tighten the mounting screw as necessary for this to be so. Solder the amplifiers pins to the PCB. Add other passive components as necessary to complete your circuit. Most common configurations will ground the non-inverting pin of the amplifier. J1 is a convenient way to do this if necessary for your application circuit. The four holes at the corners of the circuit board are for mounting #6 standoff spacers if desired. R1-R5 are multiple feedback resistors in series. Commonly available resistors do not have a breakdown voltage sufficient to stand off the output voltage of the amplifier. Using multiple resistors will divide down the voltage that each resistor must withstand. EK19U Rev F 3 EK19 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 Microtechnology, Inc. All other corporate names noted herein may be trademarks of their respective holders. 4 EK19U Rev F