Product Innovation PA13, PA13A PA13PA13 • PA13A • PA13A From Power Operational Amplifier FEATURES ♦ LOW THERMAL RESISTANCE — 1.1°C/W ♦ CURRENT FOLDOVER PROTECTION ♦ EXCELLENT LINEARITY — Class A/B Output ♦ WIDE SUPPLY RANGE — ±10V to ±45V ♦ HIGH OUTPUT CURRENT — Up to ±15A Peak APPLICATIONS ♦ MOTOR, VALVE AND ACTUATOR CONTROL ♦ MAGNETIC DEFLECTION CIRCUITS UP TO 10A ♦ POWER TRANSDUCERS UP TO 100kHz ♦ TEMPERATURE CONTROL UP TO 360W ♦ PROGRAMMABLE POWER SUPPLIES UP TO 90V ♦ AUDIO AMPLIFIERS UP TO 120W RMS DESCRIPTION The PA13 is a state of the art high voltage, very high output current operational amplifier designed to drive resistive, inductive and capacitive loads. For optimum linearity, especially at low levels, the output stage is biased for class A/B operation using a thermistor compensated base-emitter voltage multiplier circuit. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limiting resistors. For continuous operation under load, a heatsink of proper rating is recommended. The PA13 is not recommended for gains below –3 (inverting) or +4 (non-inverting). 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 12-pin power SIP package is electrically isolated. EQUIVALENT SCHEMATIC 12 11 Q2A D1 Q2B Q1 10 9 Q3 Q4 3 4 Q5 7 8 2 Q6A A1 Q6B 1 C1 5 6 EXTERNAL CONNECTIONS 1 2 3 4 5 6 7 8 9 10 11 12 F.O. –R CL –IN +IN +R CL –VS –CL +CL +VS OUTPUT PA13U www.cirrus.com Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved) 12-pin SIP PACKAGE STYLE DP Formed leads avaliable See package style EE AUG 20091 APEX − PA13REVO PA13 • PA13A Product Innovation From 1. CHARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS – PA13/PA13A Parameter Symbol Min Max Units SUPPLY VOLTAGE, +VS to -VS 100 V OUTPUT CURRENT, within SOA 15 A POWER DISSIPATION, internal 135 W INPUT VOLTAGE, differential -37 37 V INPUT VOLTAGE, common mode -VS VS V TEMPERATURE, pin solder, 10s max. 260 °C TEMPERATURE, junction (Note 3) 175 °C TEMPERATURE RANGE, storage −40 85 °C OPERATING TEMPERATURE RANGE, case −25 85 °C CAUTION The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. SPECIFICATIONS Parameter Test Conditions2,5 PA13 Min Typ PA13A Max Min Typ Max Units INPUT OFFSET VOLTAGE, initial ±2 ±6 ±1 ±4 mV ±10 ±65 * ±40 µV/°C OFFSET VOLTAGE vs. supply ±30 ±200 * * OFFSET VOLTAGE vs. power ±20 BIAS CURRENT, initial ±12 ±30 ±10 ±20 nA ±50 ±500 * * pA/°C OFFSET VOLTAGE vs. temp BIAS CURRENT, vs. temp Full temp range Full temp range BIAS CURRENT, vs. supply ±10 OFFSET CURRENT, initial ±12 OFFSET CURRENT, vs. temp Full temp range INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE (Note 4) Full temp range COMMON MODE REJECTION, Full temp range, DC VCM = ±VS – 6V * * ±30 ±5 µV/V µV/W pA/V ±10 nA ±50 * pA/°C 200 * MΩ 3 * pF ±VS - 5 ±VS - 3 * * V 74 100 * * dB * dB 96 108 * dB * MHz * kHz * ° GAIN OPEN LOOP GAIN @ 10Hz 1KΩ load OPEN LOOP GAIN @ 10Hz Full temp range, 8Ω load 110 GAIN BANDWIDTH PRODUCT 8Ω load @ 1MHz POWER BANDWIDTH 8Ω load PHASE MARGIN, A V = +4 Full temp range, 8Ω load 2 * 4 13 20 20 * PA13U PA13 • PA13A Product Innovation From Parameter Test Conditions2,5 PA13 Min Typ PA13A Max Min Typ Max Units OUTPUT VOLTAGE SWING (Note 4) PA13 = 10A, PA13A = 15A ±VS - 6 * V VOLTAGE SWING (Note 4) IO = 5A ±VS - 5 * V VOLTAGE SWING (Note 4) Full temp range, IO = 80mA ±VS - 5 * V CURRENT, peak SETTLING TIME to 0.1% 10 2V step SLEW RATE 15 2 2.5 4 * A * µS * V/µS CAPACITIVE LOAD Full temp range, AV = 4 1.5 * CAPACITIVE LOAD Full temp range, A V > 10 SOA * nF POWER SUPPLY VOLTAGE Full temp range ±10 CURRENT, quiescent ±40 ±45 25 * * * V 50 * * mA THERMAL RESISTANCE, AC, junction to case (Note 5) TC = –55 to +125°C, F > 60Hz 0.6 0.7 * * °C/W RESISTANCE, DC, junction to case TC = –55 to +125°C 0.9 1.1 * * °C/W RESISTANCE, DC, junction to air TC = –55 to +125°C 30 TEMPERATURE RANGE, case Meets full range specification -25 * +85 * °C/W * °C NOTES: 1. (All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical performance characteristics and specifications are derived from measurements taken at typical supply voltages and TC = 25°C). 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. * The specification of PA13A is identical to the specification for PA13 in the applicable column to the left 3. The power supply voltage for all tests is ±40, unless otherwise noted as a test condition. 4. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. Full temperature range specifications are guaranteed but not 100% tested. PA13U 3 PA13 • PA13A Product Innovation From POWER RATING Not all vendors use the same method to rate the power handling capability of a Power Op Amp. Apex Precision Power rates the internal dissipation, which is consistent with rating methods used by transistor manufacturers and gives conservative results. Rating delivered power is highly application dependent and therefore can be misleading. For example, the 135W internal dissipation rating of the PA13 could be expressed as an output rating of 260W for audio (sine wave) or as 440W if using a single ended DC load. Please note that all vendors rate maximum power using an infinite heatsink. TYPICAL APPLICATION +73V 47µF 2.5VP-P 3 PA13 1 7,8 5,6 Apex Precision Power has eliminated the tendency of class A/B output stages toward thermal runaway and thus has vastly increased amplifier reliability. This feature, not found in most other Power Op Amps, was pioneered by Apex Precision Power in 1981 using thermistors which assure a negative temperature coefficient in the quiescent current. The reliability benefits of this added circuitry far outweigh the slight increase in component count. RCL– 7.8mH 4Ω 5Ap-p RD 2K .2Ω .1µF 47µF THERMAL STABILITY .1µF RCL+ 11,12 9,10 .2Ω 2 CF –22V 50pF RF 1K L* 1 YOKE DRIVER: –V = t RS .5Ω HIGH CURRENT ASYMMETRICAL SUPPLY 60 PA13 40 20 0 0 1.3 1.0 .7 –30 80 –60 40 20 –120 –150 0 –180 –210 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) COMMON MODE REJECTION 8 120 100 80 60 10.0 6 4 2 0 O =0 VO = 24V VO = 0 5.0 2.5 V RCL = .18Ω, RFO = 0 7.5 VO = –24 V 0 –50 –25 0 25 50 75 100 125 CASE TEMPERATURE, TC (°C) POWER RESPONSE 100 –90 –20 1 RCL = .06Ω, RFO = ∞ 12.5 PHASE RESPONSE 0 100 60 15.0 .4 –50 –25 0 25 50 75 100 125 CASE TEMPERATURE, TC (°C) 20 40 60 80 100 120 140 CASE TEMPERATURE, TC (°C) PHASE, Ф (°) OPEN LOOP GAIN, A (dB) REJECTION, CMR (dB) 4 1.6 SMALL SIGNAL RESPONSE 120 CURRENT LIMIT, ILIM (A) 80 2.2 1.9 CURRENT LIMIT 17.5 1 10 46 32 22 VIN = 5V, tr = 100ns | +VS | – | –VS | = 80V 15 | +VS | + | –VS | = 30V 10 6.8 4.6 10K 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) PULSE RESPONSE | +VS | + | –VS | = 100V 68 OUTPUT VOLTAGE, VO (VP-P) 100 BIAS CURRENT 2.5 100 OLTAGE, VN (nV/√Hz) 120 NORMALIZED BIAS CURRENT, IB (X) POWER DERATING 140 OLTAGE, VO (V) INTERNAL POWER DISSIPATION, P (W) TYPICAL PERFORMANCE GRAPHS 20K 30K 50K 70K .1M FREQUENCY, F (Hz) INPUT NOISE 70 50 40 30 PA13U 20 –180 Product Innovation From COMMON MODE REJECTION 80 60 40 20 0 1 0 -2 -4 -6 4 6 8 TIME, t (µs) 10 12 QUIESCENT CURRENT 1.6 AV =10 VS = 37V RL = 4Ω 1.4 W W 0m .1 = PO 10 =4 PO 0W .01 .003 100 2 P 300 = 12 1.2 TC C = –25° °C T C = 25 1.0 °C T C = 85 .8 TC = 125°C .6 O 1K 3K 10K 30K FREQUENCY, F (Hz) .1M .4 40 20K 30K 50K 70K .1M FREQUENCY, F (Hz) INPUT NOISE 100 2 HARMONIC DISTORTION .3 .03 4.6 10K VIN = 5V, tr = 100ns 0 PA13 • PA13A 6.8 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 4 1M | +VS | + | –VS | = 30V 10 VOLTAGE DROP FROM SUPPLY (V) 3 100 1K 10K .1M FREQUENCY, F (Hz) 10 15 PULSE RESPONSE 6 -8 1 10 8 120 100 1 | +VS | – | –VS | = 80V 22 INPUT NOISE VOLTAGE, VN (nV/√Hz) 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 10 –210 OUTPUT VOLTAGE, VO (V) COMMON MODE REJECTION, CMR (dB) –20 1 DISTORTION, (%) –120 –150 0 32 OUTPUT VOLTAGE, PHASE, Ф (° 40 –90 NORMALIZED, IQ (X) OPEN LOOP GAIN 60 50 60 70 80 90 100 TOTAL SUPPLY VOLTAGE, VS (V) 70 50 40 30 20 10 10 1K 100 10K FREQUENCY, F (Hz) .1M OUTPUT VOLTAGE SWING 6 5 –VO 4 3 +VO 2 1 0 3 6 9 12 OUTPUT CURRENT, IO (A) 15 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.Cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. MA L OW D AK ER 5°C 5°C E BR 2.0 TH C =2 =8 D 4.0 3.0 C T ON T 6.0 ms 0.5 s t = 1m s t= 5m 10 t= N 1.0 e tat ys .6 ad ste PA13U SOA 15 C SE 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. The SOA curves combine the effect 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. However, the following guidelines may save extensive analytical efforts. OUTPUT CURRENT FROM +VS OR -VS (A) SAFE OPERATING AREA (SOA) .4 10 20 30 40 50 70 90 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, VS - VO (V) 5 PA13 • PA13A Product Innovation From 1. Capacitive and dynamic* inductive loads up to the following maximum are safe with the current limits set as specified. ±VS 50V 40V 35V 30V 25V 20V 15V CAPACITIVE LOAD ILIM = 5A ILIM = 10A 200µF 500µF 2.0mF 7.0mF 25mF 60mF 150mF 125µF 350µF 850µF 2.5mF 10mF 20mF 60mF INDUCTIVE LOAD ILIM = 5A ILIM = 10A 5mH 15mH 50mH 150mH 500mH 1,000mH 2,500mH 2.0mH 3.0mH 5.0mH 10mH 20mH 30mH 50mH *If the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 12.5V below the supply rail with ILIM = 10A or 27V below the supply rail with ILIM = 5A while the amplifier is current limiting, the inductor must be capacitively coupled or the current limit must be lowered to meet SOA criteria. 2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rail or common if the current limits are set as follows at TC = 25°C: ±VS SHORT TO ±VS C, L, OR EMF LOAD SHORT TO COMMON 45V 40V 35V 30V 25V 20V 15V .43A .65A 1.0A 1.7A 2.7A 3.4A 4.5A 3.0A 3.4A 3.9A 4.5A 5.4A 6.7A 9.0A These simplified limits may be exceeded with further analysis using the operating conditions for a specific application. CURRENT LIMITING Refer to Application Note 9, "Current Limiting", for details of both fixed and foldover current limit operation. Visit the Apex Precision Power web site at www.cirrus.com for a copy of Power_design.exe which plots current limits vs. steady state SOA. Beware that current limit should be thought of as a ±20% function initially and varies about 2:1 over the range of –55°C to 125°C. For fixed current limit, leave pin 4 open and use equations 1 and 2. RCL = ICL = 0.65 ICL 0.65 RCL (1) (2) Where: ICL is the current limit in amperes. RCL is the current limit resistor in ohms. 6 PA13U Product Innovation From PA13 • PA13A For certain applications, foldover current limit adds a slope to the current limit which allows more power to be delivered to the load without violating the SOA. For maximum foldover slope, ground pin 4 and use equations 3 and 4. 0.65 + (VO * 0.014) RCL ICL = RCL = (3) 0.65 + (VO * 0.014) ICL Where: VO is the output voltage in volts. (4) Most designers start with either equation 1 to set RCL for the desired current at 0v out, or with equation 4 to set RCL at the maximum output voltage. Equation 3 should then be used to plot the resulting foldover limits on the SOA graph. If equation 3 results in a negative current limit, foldover slope must be reduced. This can happen when the output voltage is the opposite polarity of the supply conducting the current. In applications where a reduced foldover slope is desired, this can be achieved by adding a resistor (RFO) between pin 4 and ground. Use equations 4 and 5 with this new resistor in the circuit. 0.65 + ICL = VO * 0.14 10.14 + RFO RCL 0.65 + RCL = Where: RFO is in K ohms. VO * 0.14 10.14 + RFO ICL (5) (6) CONTACTING CIRRUS LOGIC SUPPORT For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact [email protected]. International customers can also request support by contacting their local Cirrus Logic Sales Representative. To find the one nearest to you, go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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