PA73

PA01 • PA73 Power Operational Amplifier RoHS COMPLIANT FEATURES • • • • • Low Cost, Economy Model — PA73 High Output Current — Up to ±5A Peak Excellent Linearity — PA01 High Supply Voltage — Up to ±30V Isolated Case — 300V APPLICATIONS • • • • • • Motor, Valve And Actuator Control Magnetic Deflection Circuits up to 4A Power Transducers up to 20 kHz Temperature Control up to 180W Programmable Power Supplies up to 48V Audio Amplifiers up to 50W RMS DESCRIPTION The PA01 and PA73 are high voltage, high output current operational amplifiers designed to drive resistive, inductive and capacitive loads. For optimum linearity, the PA01 has a class A/B output stage. The PA73 has a simple class C output stage to reduce cost for motor control and other applications where crossover distortion is not critical and to provide interchangeability with type 3573 amplifiers. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limit resistors. These amplifiers are internally compensated for all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid integrated circuit utilizes thick film (cermet) resistors, 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 hermetically sealed and electrically isolated. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see Application Note 1, “General Operating Considerations.” Figure 1: Equivalent Schematic 3 * D1* Q1* Q2A Q2B 2 Q3 1 * Q4* Q5 8 * 4 A1 Q6A Q6B 5 6 www.apexanalog.com © Apex Microtechnology Inc. All rights reserved Nov 2017 PA01-73U Rev Z PA01 • PA73 TYPICAL CONNECTION Figure 2: Typical Connection * *Use 10μF per Amp of output current * 2 PA01-73U Rev Z PA01 • PA73 PINOUT AND DESCRIPTION TABLE Figure 3: External Connections Pin Number Name Description 1 OUT The output. Connect this pin to load and to the feedback resistors. 2 +CL Connect to the sourcing current limit resistor. Output current flows out of this pin through RCL+. The output pin and the load are connected to the other side of RCL+. 3 +Vs The positive supply rail. 4 +IN The non-inverting input. 5 -IN The inverting input. 6 -Vs The negative supply rail. 7 NC No connection. 8 -CL Connect to the sinking current limit resistor. Output current flows into this pin through RCL-. The output pin and the load are connected to the other side of RCL-. PA01-73U Rev Z 3 PA01 • PA73 SPECIFICATIONS The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition. ABSOLUTE MAXIMUM RATINGS Parameter Symbol PA01 Min PA73 Max Min Max Units +Vs to -Vs 60 68 V Output Current, Source, within SOA IO 5 * A Power Dissipation, Internal PD 67 * W Input Voltage, Differential VIN (Diff) ±37 * V Vcm ±VS * V 350 * °C 200 * °C Supply Voltage, Total Input Voltage, Common Mode Temperature, Pin Solder, 10s max. Temperature, Junction 1 TJ Temperature Range, Storage Operating Temperature Range, Case TC -65 +150 * * °C -25 +85 * * °C 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. CAUTION 4 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. PA01-73U Rev Z PA01 • PA73 INPUT Test Conditions Parameter PA01 Min PA73 Typ Max Min Typ Max Units Offset Voltage, Initial TC = 25°C ±5 ±12 * ±10 mV Offset Voltage vs. Temperature Full temp range ±10 ±65 * * µV/°C Offset Voltage vs. Supply TC = 25°C ±35 * ±200 µV/V Offset Voltage vs. Power TC = 25°C ±20 * Bias Current, Initial TC = 25°C ±15 ±50 * ±40 nA Bias Current vs. Temperature Full temp range ±0.05 ±0.4 * * nA/°C Bias Current vs. Supply TC = 25°C ±0.02 Offset Current, Initial TC = 25°C ±12 Offset Current vs. Temperature Full temp range Input Impedance, Common-mode TC = 25°C TC = 25°C Input Impedance, Differential TC = 25°C Input Capacitance Common Mode Voltage Range 1 Common Mode Rejection, DC 1 µV/W * ±30 * nA/V * nA ±0.05 * nA/°C 200 * MΩ 10 * MΩ 3 * pF Full temp range ±VS–6 ±VS–3 * * V TC = 25°C, VCM = VS –6V 70 110 * * dB 1. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. GAIN Parameter Test Conditions Open Loop Gain at 10 Hz Full temp range, full load Gain Bandwidth Product @ 1 MHz TC = 25°C, full load Power Bandwidth TC = 25°C, IO = 4A, VO = 40VPP Phase Margin Full temp range PA01-73U Rev Z PA01 Min Typ 91 113 PA73 Max Typ * * dB * MHz * kHz * ° 1 15 23 45 * Max Units Min 5 PA01 • PA73 OUTPUT Parameter Test Conditions PA01 Min Typ PA73 Max Max Units Min Typ ±VS–8 * V * * V Voltage Swing 1 TC=25°C, IO = 5A ±VS–10 ±VS–5 Voltage Swing1 Full temp range, IO = 2A ±VS–6 Voltage Swing 1 Full temp range, IO = 46mA ±VS–5 * V Current, Peak TC = 25°C ±5 * A Settling Time to 0.1% TC=25°C, 2V step Slew Rate TC=25°C, RL = 2.5 Ω Capacitive Load, Unity Gain Full temp range 1 * Capacitive Load, Gain > 4 Full temp range SOA * ±VS–5 2 1.0 2.6 * * µs * V/µs nF 1. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. POWER SUPPLY PA01 Test Conditions Min Voltage Full temp range ±10 Current, Quiescent TC = 25°C Parameter Typ 20 PA73 Units Max Min Typ Max ±28 * * ±30 V 2.6 5 mA 50 THERMAL Parameter Test Conditions PA01 Min PA73 Typ Max Resistance, AC, junction to Case 1 F > 60 Hz 1.9 Resistance, DC, junction to Case 2.4 F < 60 Hz Resistance, Junction to Air Temperature Range, Case Min Max 2.1 * * °C/W 2.6 * * °C/W 30 Meets full range specs -25 25 Units Typ * +85 * * °C/W * °C 1. Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz. Note: *The specification of PA73 is identical to the specification for PA01 in applicable column to the left. 6 PA01-73U Rev Z PA01 • PA73 TYPICAL PERFORMANCE GRAPHS Figure 4: Power Derating Figure 5: Bias Current 2.5 Normalized Bias Current, IB (X) /ŶƚĞƌŶĂůŝƐƐŝƉĂƟŽŶ͕W;tͿ 70 60 50 40 T = TC 30 20 T = TA 10 20 40 60 80 100 120 1.9 1.6 1.3 1.0 0.7 0.4 -50 0 0 2.2 140 -25 25 50 75 100 125 Case Temperature, TC (°C) Temperature, T (°C) Figure 6: Small Signal Response Figure 7: Phase Response 0 120 -20 100 -40 80 Phase, Ɍ;ΣͿ Open Loop Gain, AOL (dB) 0 60 40 -60 -80 -100 -120 20 -140 0 -160 -20 1 10 100 1k 10k .1M 1M Frequency, F (Hz) PA01-73U Rev Z 10M -180 1 10 100 1k 10k .1M 1M 10M Frequency, F (Hz) 7 PA01 • PA73 Figure 9: Power Response 3.5 100 3.0 68 Output Voltage, VO (VP-P) Current Limit, ILIM (A) Figure 8: Current Limit 2.5 RCLсϬ͘ϯё 2.0 1.5 RCLсϬ͘ϲё 1.0 0.5 |+VS | + |-VS | = 60V 46 32 22 15 10 6.8 0 -50 -25 0 25 50 75 100 4.6 10k 125 20k Case Temperature, TC (°C) 70k .1M Figure 11: Pulse Response 8 120 VIN = ±5V, tR = 100ns 6 100 PA01 Output Voltage, VO (V) ŽŵŵŽŶDŽĚĞZĞũĐƟŽŶ͕DZ;ĚͿ 50k Frequency, F (Hz) Figure 10: Common Mode Rejection 80 60 40 20 4 2 0 ѐĨŽƌWϳϯ -2 -4 -6 0 -8 1 10 100 1k 10k Frequency, F (Hz) 8 30k .1M 1M 0 2 4 6 8 10 12 Time, t (μs) PA01-73U Rev Z PA01 • PA73 Figure 13: Harmonic Distortion 100 3 70 1 3@ PO 7 PA 1 @ = PO 0 PA =3 2W 0.1 =3 73 PA 01 @ P PA 0.01 VS = ±28V RLсϴɏ AV = 10 2W 0.03 @ 20 0.3 O 30 W m 50 O 40 W m 0 =5 P 50 ŝƐƚŽƌƟŽŶ;йͿ Input Noise Voltage, VN (Ŷsͬя,nj) Figure 12: Input Noise 10 10 100 1k 10k .1M Frequency, F (Hz) 0.003 100 300 1k 3k 10k 30k .1M Frequency, F (Hz) Figure 14: Quiescent Current 1.3 Normalized, IQ (X) 1.2 1.1 PA01 @ 1.0 85°C +25°C –25° to 85°C @ 1 0 + PA –25° to PA73 @ 0.9 0.8 0.7 20 30 40 50 60 70 80 Total Supply Voltage, VS (V) PA01-73U Rev Z 9 PA01 • PA73 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 collectoremitter voltage exceeds specified limits. 3. The junction temperature of the output transistors. 5.0 4.0 Tc = 85 °C 3.0 Tc =1 Th 25°C erm al 2.0 ste ad y 1.0 0.8 t= sta te s 5m 0. s t = 1m t= Output Current From +VS or -VS (A) Figure 15: SOA 5m s Se co nd Br ea kd ow n 0.6 0.4 0.3 10 PA01 Limit 15 20 25 30 35 40 50 60 ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕VS-VO (V) The SOA curves combine the effect of these limits. 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. Please see Application Note 22. 10 PA01-73U Rev Z PA01 • PA73 1. EMF generating or reactive load and short circuits to the supply rail or shorts to common are safe if the current limits are set as follows at TC = 85°C. ±VS Short to ±VS C, L, or EMF Load Short to Common 34V 0.58A 1.1A 30V 0.46A 1.4A 25V 0.61A 1.7A 20V 0.86A 2.1A 15V 1.3A 2.9A 2. The output stage is protected against occasional transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. PA01-73U Rev Z 11 PA01 • PA73 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 Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. TYPICAL APPLICATION The pulse output of a non-contact optical sensor drives a voltage-to-frequency converter which generates feedback for the op amp. With the loop closed in this manner, the op amp corrects for any variations in the speed due to changing load. Because of operation in only one direction, an unsymmetrical supply is used to maximize efficiency of both the power op amp and power supply. High speed diodes at the input protect the op amp from commutator noise which may be generated by the motor. Figure 16: Typical Application (Unidirectional Optical Speed Control) CF +10V V IN RCL+ 0.33 Ω 3W RIN 0/+5V PA01-73 1N4148 RCL0.33 Ω 3W -36V RF F/V 0/-5V OPTO PULSE GEN. M 24V UNSYMMETRICAL SUPPLIES FOR EFFICIENCY CURRENT LIMIT Proper operation requires the use of two current limit resistors, connected as shown, in the external connection diagram. The minimum value for RCL is 0.12 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. 0.6V I LIM  A  = ------------------R CL    12 PA01-73U Rev Z PA01 • PA73 PACKAGE OPTIONS PACKAGE STYLE CE 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). 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