POWER OPERATIONAL AMPLIFIERS PA51 • PA51A M I C R O T E C H N O L O G Y HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 FEATURES • • • • • WIDE SUPPLY RANGE — ±10 to ±40V HIGH OUTPUT CURRENT — ±10A Peak SECOND SOURCEABLE — OPA501, 8785 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 TYPICAL APPLICATION C1 R3 +10V DESCRIPTION 0/+5V 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”. .1 Ω R1 DAC 4.16K 0/6A PA51 R2 2.5K R4 –28V MOTOR CURRENT IS A FUNCTION OF VIN 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. EXTERNAL CONNECTIONS 3 R CL+ CL+ +VS 2 3 OUT 1 OUTPUT +IN 4 Q1B R5 .5 Ω PROGRAMMABLE TORQUE CIRCUIT EQUIVALENT SCHEMATIC Q1A M .1 Ω TOP VIEW 2 –IN Q3 5 4 6 A1 1 5 –VS 7 8 CL– R CL– N.C. Q4 C1 8 Q6B Q6A 6 APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS 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 80V 10A 97W ±VS –3V ±VS 200°C 300°C –65 to +150°C –55 to +125°C PA51 TEST CONDITIONS 2, 5 PA51A MIN TYP MAX ±10 ±65 ±VS–6 70 ±5 ±10 ±35 ±20 ±15 ±.05 ±.02 ±5 ±.01 250 10 3 ±VS–3 110 MIN TYP MAX UNITS ±5 ±40 * 80 ±2 * * * * * * ±2 * * * * * * mV µV/°C µV/V µV/W nA nA/°C nA/V nA nA/°C MΩ MΩ pF V dB 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 ±40 ±12 ±20 ±3 GAIN OPEN LOOP GAIN at 10Hz Full temp. range, full load GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, full load POWER BANDWIDTH TC = 25°C, IO = 8A, VO = 40VPP PHASE MARGIN Full temperature range 94 10 115 1 16 45 * * * * * * dB MHz kHz ° * * V V V A µs V/µs nF 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 ±VS–8 ±VS–6 ±VS–6 ±10 1.0 ±VS–5 ±VS–4 * * * * 2 2.6 * * * 1.5 SOA * * POWER SUPPLY VOLTAGE CURRENT, quiescent Full temperature range TC = 25°C ±10 ±28 2.6 ±36 10 1.0 1.5 30 1.2 1.8 * ±34 * ±40 * V mA * * * * * °C/W °C/W °C/W °C THERMAL RESISTANCE, AC, junction to case4 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * 1. 2. 3. 4. 5. CAUTION F > 60Hz F < 60Hz Meets full range specifications –25 +85 –55 +125 The specification of PA51A is identical to the specification for PA51 in applicable column to the left. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. Full temperature range specifications are guaranteed but not 100% tested. 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. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 PA51 • PA51A POWER DERATING PA51 20 PA51A 0 0 25 50 75 100 125 150 TEMPERATURE, T (°C) 4.5 OPEN LOOP GAIN, AOL (dB) PHASE, ϕ (°) 0 0 –2 –4 –6 –8 0 4 6 8 TIME, (µs) 2 10 12 HARMONIC DISTORTION 10 DISTORTION (%) VS = ±36V RL = 4 Ω 3 GAIN = 10 1W 1 PO =. .3 PO W .1 .03 .01 30 = 5W PO = 50 100 300 1K 3K 10K 30K FREQUENCY, F (Hz) COMMON MODE REJECTION, CMR (dB) 2 0 2 1 80 60 40 20 0 1 10 100 1K 10K .1M FREQUENCY, F (Hz) 1M QUIESCENT CURRENT 1.6 50 R CL = 0.3 Ω 0 25 75 100 125 50 CASE TEMPERATURE, TC (°C) VS = ±40V 36 RL = 8 Ω 26 19 13 9.7 7 10K 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 100 RL = 3 Ω 20K 30K 50K 70K .1M FREQUENCY, F (Hz) BIAS CURRENT 2.5 2.2 1.9 1.6 1.3 1 .7 -50 -25 0 25 50 75 100 125 CASE TEMPERATURE, TC (°C) INPUT NOISE 100 1.4 25°C TC = 1 1.0 TC = 125°C .8 3 POWER RESPONSE COMMON MODE REJECTION 1.2 4 70 120 NORMALIZED QUIESCENT CURRENT, IQ (X) OUTPUT VOLTAGE, VO (V) 4 –210 R CL = .12 Ω 5 0 -25 10 –120 –180 RL = 5 Ω 2 8 4 6 OUTPUT CURRENT, IO (A) –90 –150 GAIN = +1 to 6 PHASE RESPONSE 0 20 6 5 O –V 0 –60 PULSE RESPONSE –2 °C 85 2.5 80 8 85°C TC –30 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) TC to = 25 = 3.0 100 –20 1 +V O TC 3.5 SMALL SIGNAL RESPONSE 40 +V O 4.0 120 60 °C 5 = –2 CURRENT LIMIT, I LIM (A) 40 5.0 OUTPUT VOLTAGE, VO (VPP ) 60 CURRENT LIMIT 7 NORMALIZED BIAS CURRENT, I B (X) 80 OUTPUT VOLTAGE SWING 5.5 INPUT NOISE VOLTAGE, VN (nV/ √ Hz) 100 VOLTAGE DROP FROM SUPPLY (V) INTERNAL POWER DISSIPATION, P(W) TYPICAL PERFORMANCE GRAPHS TC = -55°C .6 .4 30 40 50 60 70 20 80 TOTAL SUPPLY VOLTAGE, VS (V) 70 50 40 30 20 10 10 10K 1K 100 FREQUENCY, F (Hz) .1M APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] OPERATING CONSIDERATIONS 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.apexmicrotech.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 product models, consult the "Evaluation Kit" section for details. For the most current version of all Apex product data sheets, visit www.apexmicrotech.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. t= 7.0 3.0 =1 25 °C 5°C ady ste te sta 0.7 0.5 C 5 °C s 1.0 T =2 =8 5m 1.5 TC t= 2.0 TC TH ER MA L s 5.0 1m OUTPUT CURRENT FROM +V S OR –VS (A) 10 0.3 0.2 7 10 5 15 20 30 40 50 70 80 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V S –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. 1. Under transient conditions, capacitive and dynamic* inductive loads up to the following maximums are safe: CAPACITIVE LOAD INDUCTIVE LOAD ±VS ILIM = 5A ILIM = 10A ILIM = 5A ILIM = 10A 40V 35V 30V 25V 400µF 800µF 1,600µF 5.0mF 200µF 400µF 800µF 2.5mF 11mH 20mH 35mH 50mH 4.3mH 5.0mH 6.2mH 15mH 20V 15V 10mF 20mF 5.0mF 10mF 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 SHORT TO ±VS C, L, OR EMF LOAD SHORT TO COMMON 45V 40V 35V 30V 25V 20V 15V 0.1A 0.2A 0.3A 0.5A 1.2A 1.5A 2.0A 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 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. This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice. PA51U REV. L FEBRUARY 2000 © 2000 Apex Microtechnology Corp.