EK71

EK71 Evaluation Kit APPLICABLE PARTS (SOLD SEPARATELY) • PA107 INTRODUCTION The EK71 Evaluation kit is designed to provide a convenient way to breadboard and evaluate design ideas for the PA107 power operational amplifier. The evaluation board is pre-wired for all required external components. The evaluation board has been laid out and labeled to easily configure the high voltage operational amplifier in an inverting configuration. However, the evaluation board is flexible enough to analyze a multitude of standard or proprietary circuit configurations. Components not usually readily available in engineering labs are provided. External connection to the evaluation kit can be made via the terminal connectors at the edge of the circuit board. These connectors are suitable for standard banana plugs. The schematic is shown in Figure 1. Figure 1: EK71 Schematic +VAUX(Vcc) C2 1.0ʅF 200V C1 1.0ʅF 25V C3 1.0ʅF 200V C4 680ʅF 200V +VS +V (Jumper) +VSP GND CFB P1 BNC Select for response RT1 50 RT2 RIN 1k RT1 and RT2 can be used to set the circuit’s input impedance GND RFB Select for Gain CJS Select for response OUT C5 1.0ʅF 200V C7 1.0ʅF 200V C6 680ʅF 200V C8 1.0ʅF 25V -VSP -V (Jumper) -VS -VAUX(Vee) www.apexanalog.com © Apex Microtechnology Inc. All rights reserved Dec 2021 EK71U Rev E EK71 PARTS LIST Reference Manufacturer Part # Description P1 P2, P3, P4, P5, P6, P7, P8 C4, C6 146510CJ 571-0100 Connector, BNC, PCB Mount 4mm Black PCB Socket Single 1 9 KMH200VN68IM25X40T2 Capacitor, 680 µF 2 EVAL71 HS20 310-43-120-41-001000 PC Board Heatsink Mating Socket 1 1 1 OX7R105KWN Cap, 1µF 4 TW07 Thermal Washer, PSIP 1 C2, C7, C5, C3 QTY BEFORE YOU GET STARTED • • • • • • • • Please read this data sheet in its entirety before starting to construct your evaluation board. All Apex Microtechnology amplifiers should be handled using proper ESD precautions. Do not change connections while the circuit is powered. Initially set all power supplies to the minimum operating voltage allowed in the device data sheet. Always use adequate power supply bypass capacitors, Apex Microtechnology recommends 1µF (ceramic) in parallel with at least 10µF per ampere of output current (electrolytic/tantalum). Always provide the adequate heat sinking. Power dissipation must be considered to ensure maximum junction temperature is not exceeded. Check for oscillations. Please refer to Application Note, AN01 for general operating considerations. ASSEMBLY 1. See Figure 1 and Figure 2. Solder the surface mount ceramic capacitors to the DUT side of the circuit board at C2, C7, C5 and C3. 2. Clip off the mating socket strip after the 12th position. Insert the strip into the circuit board from the DUT side and solder one pin on the reverse side. Check that the mating socket strip is fully seated against the circuit board then solder the remaining pins. Insert the amplifier fully into the mating socket strip, noting the pin 1 locations on the amplifier and the circuit board. 3. To select the values of feedback resistor (RFB), feedback capacitor (CFB) and summing junction capacitor (CSJ), please refer to the section titled “FEEDBACK CONSIDERATIONS” in the PA107DP data sheet. 4. C1 and C8 are user supplied pin-through-hole bypass capacitors for Vcc and Vee respectively. Insert C1 and C8 from the component side and solder from the circuit side. 5. Add other components as necessary to complete your application circuit. 6. Solder the electrolytic capacitors to the circuit board at C4 and C6. Match the polarity markings on the circuit board with those on the capacitor body. 7. Examine the large heat sink. Notice that there are several holes in the face of the heat sink. These are for mounting various Apex Microtechnology amplifier models. The circuit board aligns the amplifier with the correct mounting hole once the heat sink is attached to the circuit board. 8. The four holes at the corners of the circuit board are for mounting #6 standoff spacers if desired. The remaining two slotted holes are for mounting the large heat sink to the DUT side of the circuit board. Temporarily mount the heat sink with 2 #6 x 1/2” [3 x 15mm] self tapping screws from the opposite side of the circuit board. Do not fully tighten the screws at this time. Check for alignment of the slot in the 2 EK71U Rev E EK71 mounting tab of the amplifier with a hole in the heat sink. Dismount and rotate the heat sink if necessary to achieve an alignment with a hole in the heat sink. Position the heat sink so that the back of the amplifier mounting tab is flush with the heat sink then tighten the heat sink mounting screws. 9. Hang the thermal washer near the end of a 6-32 x 1/2” [M4 X 15mm] 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 heat sink. Secure the screw from the opposite side of the heat sink using a nut holder. Figure 2: EK71 Assembly EK71U Rev E 3 EK71 Figure 3: EVAL71 PCB Layout 5.900” 3.625” TOP SIDE BOTTOM SIDE 4 EK71U Rev E EK71 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. EK71U Rev E 5