PA51A

PA51PA51 • PA51A • PA51A PA51, PA51A Power Operational Amplifier FEATURES • WIDE SUPPLY RANGE — ±10 to ±40V • HIGH OUTPUT CURRENT — ±10A Peak • CLASS “C” OUTPUT — Low Cost • LOW QUIESCENT CURRENT — 2.6mA APPLICATIONS • DC SERVO AMPLIFIER • MOTOR/SYNCHRO DRIVER • VALVE AND ACTUATOR CONTROL • DC OR AC POWER REGULATOR 8-PIN TO-3 PACKAGE STYLE CE TYPICAL APPLICATION C1 DESCRIPTION The PA51 and PA51A are high voltage, high output current operational amplifiers designed to drive resistive, inductive and capacitive loads.Their complementary common emitter output stage is the simple class C type optimized for low frequency applications where crossover distortion is not critical. These amplifiers are not recommended for audio, transducer or deflection coil drive circuits. The safe operating area (SOA) is fully specified and can be observed for all operating conditions by selection of user programmable current limiting resistors. Both amplifiers are internally compensated for all gain settings. For continuous operation under load, mounting on a heatsink of proper rating is recommended. Do not use isolation washers! This hybrid integrated circuit utilizes thick film conductors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is electrically isolated and hermetically sealed. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations”. The linear relationship of torque output to current input of the modern torque motor makes this simple control circuit ideal for many material processing and testing applications. The sense resistor develops a feedback voltage proportional to motor current and the small signal properties of the Power Op Amp insure accuracy. With this closed loop operation, temperature induced impedance variations of the motor winding are automatically compensated. EQUIVALENT SCHEMATIC EXTERNAL CONNECTIONS R3 +10V 0/+5V DAC R1 .1Ω 4.16K 0/6A PA51 R2 2.5K R4 M .1Ω –28V MOTOR CURRENT IS A FUNCTION OF VIN PROGRAMMABLE TORQUE CIRCUIT N.C. CL– 3 Q1A 7 8 RCLQ1B –VS 6 5 –IN TOP VIEW 2 4 OUTPUT Q3 OUT 4 A1 R5 .5Ω 1 RCL+ 1 2 CL+ +IN 3 +VS 5 Q4 C1 8 Q6A Q6B 6 www.apexanalog.com PA51U Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved) OCT 2012 1 PA51U REVU PA51 • PA51A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, junction1 TEMPERATURE, pin solder -10s TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case SPECIFICATIONS PARAMETER TEST CONDITIONS 2, 5 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. temperature BIAS CURRENT, vs. supply OFFSET CURRENT, initial OFFSET CURRENT, vs. temperature INPUT IMPEDANCE, common mode INPUT IMPEDANCE, differential INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC3 TC = 25°C Full temperature range TC = 25°C TC = 25°C TC = 25°C Full temperature range TC = 25°C TC = 25°C Full temperature range TC = 25°C TC = 25°C TC = 25°C Full temperature range TC = 25°C, VCM = ±VS –6V GAIN OPEN LOOP GAIN at 10Hz GAIN BANDWIDTH PRODUCT @ 1MHz POWER BANDWIDTH PHASE MARGIN Full temp. range, full load TC = 25°C, full load TC = 25°C, IO = 8A, VO = 40VPP Full temperature range OUTPUT VOLTAGE SWING3 VOLTAGE SWING3 VOLTAGE SWING3 CURRENT SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD, unity gain CAPACITIVE LOAD, gain > 4 TC = 25°C, IO = 10A Full temp. range, IO = 4A Full temp. range, IO = 68mA TC = 25°C TC = 25°C, 2V step TC = 25°C, RL = 6Ω Full temperature range Full temperature range POWER SUPPLY VOLTAGE CURRENT, quiescent Full temperature range TC = 25°C THERMAL RESISTANCE, AC, junction to case4 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case MIN PA51 TYP PA51A MAX MIN TYP ±VS–6 70 ±5 ±10 ±35 ±20 ±15 ±.05 ±.02 ±12 ±.05 250 10 3 ±VS–3 110 115 1 16 45 94 10 ±VS–8 ±VS–6 ±VS–6 ±10 1.0 ±10 F > 60Hz F < 60Hz Meets full range specifications 80V 10A 97W ±37V ±VS 200°C 350°C –65 to +150°C –55 to +125°C –25 MAX UNITS ±10 ±65 ±40 ±30 * 80 ±2 ±8 * ±40 * * * ±30 * * ±5 ±10 * * * * * * mV µV/°C µV/V µV/W nA nA/°C nA/V nA nA/°C MΩ MΩ pF V dB * * * * * * dB MHz kHz ° * * * * * * * * * 1.5 * SOA * V V V A µs V/µs nF ±28 2.6 ±36 * 10 V mA 1.0 1.5 30 1.2 * * 1.8 * * * +85 –55 +125 ±VS–5 ±VS–4 2 2.6 ±34 * ±40 * °C/W °C/W °C/W °C NOTES: * The specification of PA51A is identical to the specification for PA51 in applicable column to the left. 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 2. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition. 3. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. 4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 5. Full temperature range specifications are guaranteed but not 100% tested. CAUTION 2 The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. PA51U POWER DERATING OUTPUT VOLTAGE SWING 0 0 120 PA51A 25 50 75 100 125 TEMPERATURE, T (°C) 150 SMALL SIGNAL RESPONSE 6 4.5 2.5 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) OPEN LOOP GAIN, AOL (dB) –210 0 –2 –4 –6 –8 0 DISTORTION (%) 6 8 4 TIME, (s) 2 VS = 36V RL = 4Ω GAIN = 10 1W PO =. .3 PO .1 = 5W W PO .03 100 = 80 60 40 20 0 50 300 1K 3K 10K FREQUENCY, F (Hz) 30K 1.6 1 10 100 1K 10K .1M FREQUENCY, F (Hz) 1M QUIESCENT CURRENT 1.4 1.2 1.0 .8 T C = 125°C T C = 25°C °C TC = 5 –5 .6 .4 3 2 1 RCL = 0.3Ω 50 0 25 75 100 125 CASE TEMPERATURE, TC (°C) VS = 40V 50 36 RL = 8Ω 26 19 13 RL = 3Ω 9.7 7 10K 20K 30K 50K 70K .1M FREQUENCY, F (Hz) COMMON MODE REJECTION 100 12 HARMONIC DISTORTION 1 PA51U 10 120 4 70 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 10 RCL = .12Ω POWER RESPONSE PHASE RESPONSE 1 CURRENT LIMIT 5 0 -25 10 –150 COMMON MODE REJECTION, CMR (dB) 2 .01 30 2 4 6 8 OUTPUT CURRENT, IO (A) –120 NORMALIZED QUIESCENT CURRENT, IQ (X) OUTPUT VOLTAGE, VO (V) RL = 5Ω GAIN = +1 4 3 0 –90 PULSE RESPONSE 8 10 5 to =2 C 85° –180 0 6 TC 0 –60 –20 1 =– 3.0 80 20 TC 3.5 –30 40 C 25° 4.0 100 60 CURRENT LIMIT, ILIM (A) PA51 20 5.0 OUTPUT VOLTAGE, VO (VP-P) 40 7 20 30 40 50 60 70 80 90 TOTAL SUPPLY VOLTAGE, VS (V) NORMALIZED BIAS CURRENT, IB (X) 60 5.5 BIAS CURRENT 2.5 2.2 1.9 1.6 1.3 1.0 .7 .4 –50 –25 0 25 50 75 100 125 CASE TEMPERATURE, TC (°C) 100 INPUT NOISE VOLTAGE, VN (nV/√Hz) 80 VOLTAGE DROP FROM SUPPLY (V) 100 PHASE, Ф (°) INTERNAL POWER DISSIPATION, P (W) PA51 • PA51A INPUT NOISE 70 50 40 30 20 10 10 100 1K 10K FREQUENCY, F (Hz) .1M 3 PA51 • PA51A GENERAL Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The "Application Notes" and "Technical Seminar" sections contain a wealth of information on specific types of applications. Package outlines, heat sinks, mounting hardware and other accessories are located in the "Packages and Accessories" section. Evaluation Kits are available for most Apex Microtechnology product models, consult the "Evaluation Kit" section for details. For the most current version of all Apex Microtechnology product data sheets, visit www.apexanalog.com. SAFE OPERATING AREA (SOA) The output stage of most power amplifiers has three distinct limitations: 1. The current handling capability of the transistor geometry and the wire bonds. 2. The second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceeds specified limits. 3. The junction temperature of the output transistors. SOA T C =1 5°C 5°C 25 °C ady te sta 0.5 L =2 =8 ste 0.7 C s 1.0 MA 5m 1.5 T t= 2.0 C ER s 3.0 T TH 1m 5.0 t= OUTPUT CURRENT FROM +VS OR – VS (A) 10 7.0 0.3 0.2 ±VS 40V 35V 30V 25V 20V 15V CAPACITIVE LOAD ILIM = 5A ILIM = 10A 400µF 200µF 800µF 400µF 1,600µF 800µF 5.0mF 2.5mF 10mF 5.0mF 20mF 10mF INDUCTIVE LOAD ILIM = 5A ILIM = 10A 11mH 4.3mH 20mH 5.0mH 35mH 6.2mH 50mH 15mH 400mH 20mH ** 100mH * If the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 8V below the supply rail with ILIM = 10A or 15V below the supply rail with ILIM = 5A while the amplifier is current limiting, the inductor should be capacitively coupled or the current limit must be lowered to meet SOA criteria. ** Second breakdown effect imposes no limitation but thermal limitations must still be observed. 2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rail or shorts to common if the current limits are set as follows at TC = 85°C. ±VS 45V 40V 35V 30V 25V 20V 15V SHORT TO ±VS C, L, OR EMF LOAD 0.1A 0.2A 0.3A 0.5A 1.2A 1.5A 2.0A SHORT TO COMMON 1.3A 1.5A 1.6A 2.0A 2.4A 3.0A 4.0A These simplified limits may be exceeded with further analysis using the operating conditions for a specific application. 3.The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. CURRENT LIMIT 5 15 20 30 40 50 70 80 7 10 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS – VO (V) The SOA curves combine the effect of of all limits for this Power Op Amp. For a given application, the direction and magnitude of the output current should be calculated or measured and checked against the SOA curves. This is simple for resistive loads but more complex for reactive and EMF generating loads. The following guidelines may save extensive analytical efforts. 4 1. Under transient conditions, capacitive and dynamic* inductive loads up to the following maximums are safe: Proper operation requires the use of two current limit resistors, connected as shown in the external connection diagram. The minimum value for RCL is .06 ohm, however for optimum reliability it should be set as high as possible. Refer to the “General Operating Considerations” section of the handbook for current limit adjust details. PA51U PA51 • PA51A 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 PA51U Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved) OCT 20125 PA51U REVU