OPA501RM

® OPA501 High Current, High Power OPERATIONAL AMPLIFIER FEATURES q HIGH OUTPUT CURRENT: ±10A Peak q WIDE POWER SUPPLY RANGE: ±10 to ±40V q LOW QUIESCENT CURRENT: 2.6mA q ISOLATED CASE TO-3 PACKAGE APPLICATIONS q MOTOR DRIVER q q q q SERVO AMPLIFIER VALVE ACTUATOR SYNCRO DRIVER PROGRAMMABLE POWER SUPPLY DESCRIPTION The OPA501 is a high output current operational amplifier. It can be used in virtually all common op amp circuits, yet is capable of output currents up to ±10A. Power supply voltages up to ±40V allow very high output power for driving motors or other electromechanical loads. Safe operating area is fully specified, and user-set current limits provide protection for both the amplifier and load. The class-B (zero output stage bias) provides low quiescent current during small-signal conditions. This rugged hybrid integrated circuit is packaged in a metal 8-pin TO-3 package. Both industrial and military temperature range models are available. V+ 3 2 +Output Drive + RCL 5 4 1 Current Sense 8 –Output Drive Output RCL – 6 V– International Airport Industrial Park • Mailing Address: PO Box 11400 Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706 Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1983 Burr-Brown Corporation PDS-490F Printed in U.S.A. August, 1993 SPECIFICATIONS ELECTRICAL At TC = +25°C, VS = ±28V, (OPA501RM, AM); VS = ±34V (OPA501SM, BM) unless otherwise noted. OPA501RM, AM PARAMETER RATED OUTPUT(1, 2) Output Current Continuous(3) Output Voltage(3) DYNAMIC RESPONSE Bandwidth, Unity Gain Full Power Bandwidth Slew Rate INPUT OFFSET VOLTAGE Initial Offset vs Temperature vs Supply Voltage INPUT BIAS CURRENT Initial vs Temperature vs Supply Voltage INPUT DIFFERENCE CURRENT Initial vs Temperature OPEN-LOOP GAIN, DC RL = 6.5Ω (SM, BM) INPUT IMPEDANCE Differential Common-mode INPUT NOISE Voltage Noise fn = 10Hz to 10kHz Current Noise fn = 10Hz to 10kHz INPUT VOLTAGE RANGE Common-mode Voltage(4) Common-mode Rejection POWER SUPPLY Rated Voltage Operating Voltage Range Current, quiescent TEMPERATURE RANGE Specification, RM, SM AM, BM Operating, derated performance, AM, BM Storage THERMAL RESISTANCE *Specification same as for OPA501RM, AM. NOTES: (1) Package must be derated based on a junction-to-case thermal resistance of 2.2°C/W or a junction-to-ambient thermal resistance of 30°C/W. (2) Safe Operating Area and Power Derating Curves must be observed. (3) With ±RSC = 0. Peak output current is typically greater than 10A if duty cycle and pulse width limitations are observed. Output current greater than 10A is not guaranteed. (4) The absolute maximum voltage is 3V less than supply voltage. case –55 –25 –55 –65 Steady State θJC 2.0 +125 +85 +125 +150 2.2 * * * * * * * * * * °C °C °C °C °C/W fn = 0.3Hz to 10Hz 5 fn = 0.3Hz to 10Hz 4.5 Linear Operation f = DC, VCM = ±(|VS|–6) ±(|VS|–6) 70 ±(|VS|–3) 110 ±28 ±2.6 20 * * 80 * * ±34 * * TCASE = +25°C CONDITIONS RL = 2Ω (RM, AM) RL = 2.6Ω (SM, BM) IO = 10A peak Small Signal VO = 40Vp-p, RL = 8Ω RL = 5Ω (RM, AM) RL = 6.5Ω (SM, BM) MIN ±10 ±10 ±20 TYP MAX MIN * * ±26 OPA501SM, BM TYP MAX UNITS A A V MHz kHz V/µs v/µs ±5 ±40 mV µV/°C µV/°C µV/V nA nA/°C nA/V nA nA/°C nA/°C dB dB MΩ MΩ µVp-p pAp-p pArms V dB V V mA ±23 1 16 ±29 * * 10 1.35 1.35 * * * ±10 ±65 –25°C < T < +85°C (AM, BM) –55°C < T < +125°C (RM, SM) ±5 ±10 ±35 15 ±0.05 ±0.02 ±5 ±0.01 94 115 ±2 ±10 * * * * ±2 ±0.01 98 115 * * * * * 40 20 TCASE = +25°C –25°C < T < +85°C (AM, BM) –55°C < T < +125°C (RM, SM) RL = 5Ω (RM, AM) ±10 ±3 10 250 3 µVrms ±10 ±36 ±10 ±40 * The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® OPA501 2 ABSOLUTE MAXIMUM RATINGS Power Supply Voltage (VS) ................................................................ ±40V Power Dissipation at +25°C(1, 2) .......................................................... 79W Differential Input Voltage ............................................................... ±VS –3V Common-Mode Input Voltage .............................................................. ±VS Operating Temperature Range ....................................... –55°C to +125°C Storage Temperature Range .......................................... –65°C to +150°C Lead Temperature (soldering, 10s) ................................................ +300°C Junction Temperature .................................................................... +200°C Output Short-Circuit Duration(3) ................................................ Continuous NOTES: (1) At case temperature of +25°C. Derate at 2.2°C/W above case temperature of +25°C. (2) Average dissipation. (3) Within safe operating area and with appropriate derating. CONNECTION DIAGRAM Top View RSC +Output Drive + V+ 3 +In 4 2 1 Current Sense VO –In 5 8 6 V– 7 NC –Output Drive RSC – ORDERING INFORMATION MODEL OPA501AM OPA501BM OPA501RM OPA501SM PACKAGE 8-Pin 8-Pin 8-Pin 8-Pin Metal Metal Metal Metal TO-3 TO-3 TO-3 TO-3 TEMPERATURE RANGE –25°C to +85°C –25°C to +85°C –55°C to +125°C –55°C to +125°C PACKAGE INFORMATION MODEL OPA501AM OPA501BM OPA501RM OPA501SM PACKAGE 8-Pin Metal TO-3 8-Pin Metal TO-3 8-Pin Metal TO-3 8-Pin Metal TO-3 PACKAGE DRAWING NUMBER(1) 030 030 030 030 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix D of Burr-Brown IC Data Book. ® 3 OPA501 TYPICAL PERFORMANCE CURVES Typical at +25°C case and ±VS = 28VDC, unless otherwise noted. OPEN-LOOP FREQUENCY RESPONSE 120 100 0 –30 Phase 120 COMMON MODE REJECTION vs FREQUENCY Common-Mode Rejection (dB) 100 80 60 40 20 0 1 10 100 1k Frequency (Hz) 10k 100k 1M 60 40 20 0 –20 1 10 100 1k 10k 100k 1M Frequency (Hz) Amplitude –90 –120 –150 –180 –210 10M Phase (degree) Amplitude (dB) 80 –60 INPUT BIAS CURRENT vs TEMPERATURE 2.8 ±40 OUTPUT VOLTAGE SWING vs POWER SUPPLY VOLTAGE AV = 10 Input Bias Current (Normalized) 2.4 2.0 1.6 1.2 0.8 0.4 0 –50 ±35 Output Voltage (Vpk) ±30 ±25 ±20 ±15 ±10 IO = 1A IO = 5A IO = 10A –25 0 25 50 75 100 125 ±10 ±15 ±20 ±25 ±30 ±35 ±40 Case Temperature (°C) Power Supply Voltage, VS (V) FULL POWER RESPONSE 100 60 +VS = ±34V 1.8 HARMONIC DISTORTION vs FREQUENCY Total Harmonic Distortion (%) Output Voltage Swing (Vp-p) 40 20 10 6 4 2 +VS = ±28V Maximum “Undistorted” Sine Wave Output Maximum Output 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 VO = 40Vp-p AV = +10 VS = ±28V RL = 4 Ω RL = 8 Ω RL = 16 Ω RL = 50 Ω RL = 8 Ω AV = +10 TC = +25°C 1 2 4 6 10 20 40 60 100 10 102 Frequency (kHz) 103 104 Frequency (kHz) ® OPA501 4 TYPICAL PERFORMANCE CURVES (CONT) Typical at +25°C case and ±VS = 28VDC, unless otherwise noted. POWER DERATING CURVE 120 CURRENT LIMIT RESISTOR vs LIMIT CURRENT 0.28 Internal Power Dissipation, PD (W) Current Limit Resistor, RSC (Ω) 100 80 0.24 TC = +25°C 0.20 0.16 0.12 0.08 0.04 0 θJC = 2.2°C/W 60 40 20 0 0 25 50 75 100 125 150 Case Temperature (°C) 0 2 4 6 8 10 12 14 Limit Current (A) CURRENT LIMIT vs TEMPERATURE ±7 ±6 Short Circuit Current (A) Normalized (θ JC) NORMALIZED THERMAL RESISTANCE vs FREQUENCY 1.2 1.0 ±5 ±4 ±3 ±2 ±1 0 –50 RSC = 0.12Ω 0.8 0.6 0.4 0.2 0 RSC = 0.28Ω –25 0 25 50 75 100 125 0.1 1 10 100 1k 10k Case Temperature (°C) Frequency (Hz) PULSE RESPONSE, AV = +1 PULSE RESPONSE, AV = +1 Input/Output Voltage (5V/div) Time (10µs/div) Input/Output Voltage (5V/div) Time (100µs/div) ® 5 OPA501 APPLICATIONS INFORMATION Grounding techniques can greatly affect the performance of a power op amp. Figure 1 shows grounds connected so that load current does not flow through signal ground connections. Power supply and load connections should be physically separated from the amplifier input and signal connections. Power supply connections to the amplifier should be bypassed with 10µF tantalum capacitors connected close to the device pins. The capacitors should be connected to load ground as shown. R2 Figure 2, shows the permissible range of voltage and current. SOA is reduced at high operating temperature—see Figure 3. The safe output current decreases as VCE increases. Output short-circuits are very demanding. A short-circuit to ground forces the full power supply voltage (positive or negative side) across the conducting transistor. With VS = ±30V, the current limit must be set for 2A to be safe for short-circuit to ground. For further information on SOA and evaluating signal and load conditions, consult Applications Bulletin AB-039. HEAT SINKING Most applications require a heat sink to assure that the maximum junction temperature of 200°C is not exceeded. The size of the heat sink required depends on the power dissipated by the amplifier and ambient temperature conditions. Application Bulletin AB-039 explains how to find maximum power dissipation for DC, AC, reactive loads, and other conditions. Applications Bulletin AB-038 shows how to determine heat sink requirements. The case of the OPA501 is isolated from all circuitry and can be fastened directly to a heat sink. This eliminates cumbersome insulating hardware that degrades thermal performance. See Applications Bulletin AB-037 for information on mounting techniques and procedures. 10 8 6 4 5ms 1ms 0.5ms Maximum Specified Current TCASE = +25°C TJUNCTION = +200°C θJC = 2.2°C/W Power Dissipation Limit Second Breakdown Limit Maximum RM, AM Specified Voltage SM, BM 6 8 10 20 40 60 80100 + (1) RSC + G=1+ R2 R1 OPA501 (1) VIN R1 + RSC – Load NOTE: (1) 10µF Tantalum. V– V+ FIGURE 1. Basic Circuit Connections. CURRENT LIMITS The OPA501 has independent positive and negative current limit circuits. Current limits are set by the value of R+SC and R–SC. The approximate value of these resistors is: DC Output Current (A) 2 1.0 0.8 0.6 0.4 0.2 0.1 1 R SC = 0.65 − 0. 0437Ω I LIMIT ILIMIT is the desired maximum current at room temperature in Amperes and RSC is in ohms. The current limit value decreases with increasing temperature—see typical performance curves. The current limit resistors conduct the full amplifier output current. Power dissipation of the current limit resistors at maximum current is: P MAX = (I LIMIT )2 R SC 2 4 Voltage Across Output Transistor (V) FIGURE 2. Transistor Safe Operating Area at +25°C Case Temperature. 10 8 6 4 0.5ms 5ms Maximum Specified Current DC 1ms Output Current (A) The current limit resistors can be chosen from a variety of types. Most wire-wound types are satisfactory, although some physically large resistors may have excessive inductance which can cause instability. SAFE OPERATING AREA Stress on the output transistor is determined by the output current and the voltage across the conducting output transistor. The power dissipated by the output transistor is equal to the product of the output current and the voltage across the conducting transistor, VCE. The Safe Operating Area (SOA), 2 1.0 0.8 TCASE = +125°C TJUNCTION = +200°C 0.6 θ = 2.2°C/W JC Maximum RM, AM 0.4 Specified 0.2 Voltage SM, BM 0.1 1 2 4 6 8 10 20 40 60 80100 Voltage Across Output Transistor (V) FIGURE 3. Transistor Safe Operating Area at +125°C Case Temperature. ® OPA501 6