PA05PA05 • PA05A • PA05A P r o d u c t IPA05A I nnnnoovvaa t i o n FFr roomm PA05, Power Operational Amplifier FEATURES • HIGH INTERNAL DISSIPATION — 250 Watts • HIGH VOLTAGE, HIGH CURRENT — 100V, 30A • HIGH SLEW RATE — 100V/µs • 4 WIRE CURRENT LIMIT SENSING • LOW DISTORTION • EXTERNAL SHUTDOWN CONTROL • OPTIONAL BOOST VOLTAGE INPUTS • EVALUATION KIT — SEE EK09 12-pin Power DIP PACKAGE STYLE CR The JEDEC MO-127 12-pin Power Dip™ package (see Package Outlines) is hermetically sealed and isolated from the internal circuits. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations”. APPLICATIONS • LINEAR AND ROTARY MOTOR DRIVES • sonar transducer driver • YOKE/MAGNETIC FIELD EXCITATION • PROGRAMMABLE POWER SUPPLIES TO ±45V • AUDIO UP TO 500W TYPICAL APPLICATION DESCRIPTION The PA05 is a high voltage MOSFET power operational amplifier that extends the performance limits of power amplifiers in slew rate and power bandwidth, while maintaining high current and power dissipation ratings. The PA05 is a highly flexible amplifier. The shutdown control feature allows the output stage to be turned off for standby operation or load protection during fault conditions. Boost voltage inputs allow the small signal portion of the amplifier to operate at a higher voltage than the high current output stage. The amplifier is then biased to achieve close linear swings to the supply rails at high currents for extra efficient operation. External compensation tailors slew rate and bandwidth performance to user needs. A four wire sense technique allows precision current limiting without the need to consider internal or external milliohm parasitic resistance in the output line. The output stage is protected by thermal limiting circuits above junction temperatures of 175°C. EQUIVALENT SCHEMATIC SHUTDOWN 12 D1 Q1 Q12 Q16 Q13 Q8 Q4 4 COMP 3 Q17 Q10 Q14 BIAS Q30 –VBOOST 5 PA05U http://www.cirrus.com Q18 ILIM 11 10 ILIM Q24 Q25 D20 OUT 7 D5 Q22 –IN 1 D19 +IN 2 Q5 D6 D9 Q21 Q29 D27 D31 Rf CONTROL LOGIC ULTRASONIC DRIVE Ri 1 2 12 PA05 11 7 R CL 10 TUNED TRANSFORMER EXTERNAL CONNECTIONS –INPUT +Vs 8 9 +VBOOST The high power bandwidth of the PA05 allows driving sonar transducers via a resonant circuit including the transducer and a matching transformer. The load circuit appears resistive to the PA05. Control logic turns off the amplifier's output during shutdown. Q33 D4 6 –Vs +INPUT COMP R CC C COMP –V BOOST * SHUTDOWN 1 12 2 11 3 4 TOP VIEW 10 9 5 8 6 7 –SUPPLY CURRENT LIMIT CURRENT LIMIT +V BOOST *+SUPPLY OUTPUT PHASE COMPENSATION Gain CC RC 1 470pF 120Ω >3 220pF 120Ω ≥10 82pF 120Ω CC RATED FOR FULL SUPPLY VOLTAGE *See BOOST OPERATION paragraph. Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved) MAY 20091 APEX − PA05UREVJ PA05 • PA05A ABSOLUTE MAXIMUM RATINGS P r o d u c t I n n o v a t i o nF r o m SUPPLY VOLTAGE, +VS to –VS BOOST VOLTAGE OUTPUT CURRENT, continuous within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s TEMPERATURE, junction2 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case SPECIFICATIONS PARAMETER TEST CONDITIONS 1 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION, DC INPUT NOISE GAIN OPEN LOOP, @ 15Hz GAIN BANDWIDTH PRODUCT POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING VOLTAGE SWING CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD RESISTANCE POWER SUPPLY VOLTAGE CURRENT, quiescent, boost supply CURRENT, quiescent, total CURRENT, quiescent, total, shutdown THERMAL RESISTANCE, AC, junction to case3 RESISTANCE, DC, junction to case RESISTANCE, junction to air4 TEMPERATURE RANGE, case MIN Full temperature range Full temperature range Full temperature range Full temp. range, VCM = ±20V 100KHz BW, RS = 1KΩ Full temperature range, CC = 82pF RL = 10Ω RL = 4Ω, VO = 80VP-P, AV = –10 CC = 82pF, RC = 120Ω Full temperature range, CC = 470pF IO = 20A VBOOST = Vs + 5V, IO = 30A AV = +1, 10V step, RL = 4Ω AV = –10, CC = 82pF, RC = 120Ω Full temperature range, AV = +1 IO = 0, No load, 2MHz IO = 1A, 2MHz Full temperature range Full temperature range, F>60Hz Full temperature range, F<60Hz Full temperature range Meets full range specification ±VB–8 90 94 PA05 TYP 5 20 10 30 10 .01 10 1011 13 100 10 102 3 400 60 ±VS–9.5 ±VS–8.7 ±VS–5.8 ±VS–5.0 30 2.5 80 100 2.2 5 2 ±15 –25 ±45 46 90 46 .3 .4 12 100V SUPPLY VOLTAGE +20V 30A 250W ±20V ±VB 300°C 175°C –65 to +150°C –55 to +125°C PA05A MAX MIN TYP MAX UNITS 10 2 5 50 10 30 30 * * 10 50 5 20 * 50 5 20 * * * * * * mV µV/°C µV/V µV/W pA pA/V pA Ω pF V dB µVrms * * * * * dB MHz kHz * * * * * * * * * * V V A µs V/µs nF Ω Ω ±50 * 56 120 56 * * * * * * * * .4 * * .5 * * * 85 * * ° V mA mA mA °C/W °C/W °C/W °C NOTES: * The specification of PA05A is identical to the specification for PA05 in applicable column to the left. 1. Unless otherwise noted: TC = 25°C, CC = 470pF, RC = 120 ohms. DC input specifications are ± value given. Power supply voltage is typical rating. ±VBOOST = ±VS. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet. 3. Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz. 4. The PA05 must be used with a heatsink or the quiescent power may drive the unit to junction temperatures higher than 150°C. CAUTION 2 The PA05 is constructed from MOSFET transistors. ESD handling procedures must be observed. 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. PA05U PA05 • PA05A POWER SUPPLY REJECTION, PSR (dB) 150 100 50 60 40 20 0 10 SMALL SIGNAL RESPONSE CC = 220pf 40 CC = 470pf 100 1K 10K 100K 1M FREQUENCY, F (Hz) 10M –90 –225 10 CC = 470pF 5 2.5 0 NORMALIZED QUIESCENT CURRENT, IQ (X) 00 =3 120 110 100 90 80 70 60 25 50 –50 –25 0 75 100 125 CASE TEMPERATURE, TC (°C) QUIESCENT CURRENT POWER RESPONSE 100 1.2 1.1 1.0 .9 .8 20 CURRENT LIMIT 100 40 60 80 TOTAL SUPPLY VOLTAGE, VS (V) 60 40 20 10 F 30K 30 30 pF 3K 10K 300 1K FREQUENCY, f (Hz) 25 5 10 15 20 25 OUTPUT CURRENT, IO (A) 0p 100 20 10 15 TIME, t (µs) 130 + 5V 82 PO 5 0 = VS F .002 20 0 V 2 ST BOO 22 0W = –7.5 4 0p PO = 1W .005 –5 = VS 47 .01 PA05U 10M ST V BOO 6 = CC AV = 10 RL = 2Ω CC = 82pF, RC = 120Ω VS = 31V W HARMONIC DISTORTION .02 .001 30 1K 10K 100K 1M FREQUENCY, F (Hz) 8 = CC .05 1M OUTPUT VOLTAGE SWING = CC DISTORTION, THD (%) .1 10K 100K 100 1K FREQUENCY, F (Hz) O .2 100 –2.5 20 20 100 200 300 400 500 EXT. COMPENSATION CAPACITOR CC (pF) PULSE RESPONSE 7.5 OUTPUT VOLTAGE, VO (V) 40 P COMMON MODE REJECTION, CMR (dB) 60 CC = 220pf RL = 8Ω RC = 120Ω AV = +1 80 CC = 470pf CC = 82pf COMMON MODE REJECTION 0 10 CC = 470pf –135 100 40 10 CC = 220pf –180 20 60 12 CC = 82pf 60 80 10M –45 CC = 82pf 0 10 1K 10K 100K 1M FREQUENCY F (Hz) PHASE RESPONSE 0 RL = 8Ω RC = 120Ω 80 100 NORMALIZED CURRENT LIMIT, (%) 100 OPEN LOOP GAIN, A (dB) 80 25 50 75 100 125 150 CASE TEMPERATURE, TC (°C) SLEW RATE vs. COMP 100 OUTPUT VOLTAGE, VO (VP-P) 0 POWER SUPPLY REJECTION SLEW RATE SR (V/µS) 200 0 100 VOLTAGE DROP FROM SUPPLY, VS –VO (V) POWER DERATING 250 PHASE, Ф (°) INTERNAL POWER DISSIPATION, P (W) P r o d u c t I n n o v a t i o nF r o m 6 4 2 40K 1M .4M 100K FREQUENCY, F (Hz) 4M 3 PA05 • PA05A P r o d u c t I n n o v a t i o nF r o m 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. CURRENT LIMIT The two current limit sense lines are to be connected directly across the current limit sense resistor. For the current limit to work correctly,pin 11 must be connected to the amplifier output side and pin 10 connected to the load side of the current limit resistor, RCL, as shown in Figure 1. This connection will bypass any parasitic resistances, RP formed by sockets and solder joints as well as internal amplifier losses. The current limiting resistor may not be placed anywhere in the output circuit except where shown in Figure 1. If current limiting is not used, pins 10 and 11 must be tied to pin 7. The value of the current limit resistor can be calculated as follows: Rf The output stage thermal protection circuit engages when junction temperatures reach approximately 175C. If the condition remains that caused the shutdown, the amplifier may oscillate in and out of shutdown, creating high peak power stresses reducing the reliability of the device. SHUTDOWN OPERATION To disable the output stage, pin 12 is connected to ground via relay contacts or via an electronic switch. The switching device must be capable of sinking 2mA to complete shutdown and capable of standing off the supply voltage +VS. See Figure 2 for suggested circuits. –LOGIC K1 12 SHUTDOWN A 12 SHUTDOWN –LOGIC Q1 470Ω Ri INPUT 1 10 B 11 CL 2 PA05 7 CL FIGURE 2. SHUTDOWN OPERATION RCL RP RL ILIMIT = .7/RCL FIGURE 1. CURRENT LIMIT SAFE OPERATING AREA (SOA) The MOSFET output stage of this power operational amplifier has two distinct limitations: 1. The current handling capability of the MOSFET geometry and the wire bonds. 2. The junction temperature of the output MOSFETs. NOTE: The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. SOA 30 D C 15 12 9 C 0m s = TC °C 85 °C 25 = TC C 6 20 = TC D D 5° 12 3 C OUTPUT CURRENT (A) t= 1.5 1.2 .9 .6 .3 4 1 2 3 4 5 10 20 30 40 50 100 SUPPLY TO OUTPUT DIFFERENTIAL (V) From an internal circuitry standpoint, shutdown is just a special case of current limit where the allowed output current is zero. As with current limit, however, a small current does flow in the output during shutdown. A load impedance of 100 ohms or less is required to insure the output transistors are turned off. Note that even though the output transistors are off the output pin is not open circuited because of the shutdown operating current. BOOST OPERATION With the VBOOST feature, the small signal stages of the amplifier are operated at higher supply voltages than the amplifier’s high current output stage. +VBOOST (pin 9), and –VBOOST (pin 5) are connected to the small signal circuitry of the amplifier. +VS (pin 8) and –VS (pin 6) are connected to the high current output stage. An additional 5V on the VBOOST pins is sufficient to allow the small signal stages to drive the output transistors into saturation and improve the output voltage swing for extra efficient operation when required. When close swings to the supply rails is not required the +VBOOST and +VS pins must be strapped together as well as the –VBOOST and –VS pins.The boost voltage pins must not be at a voltage lower than the VS pins. COMPENSATION The external compensation components CC and RC are connected to pins 3 and 4. Unity gain stability can be achieved at any compensation capacitance greater than 470 pF with at least 60 degrees of phase margin. At higher gains, more phase shift can be tolerated in most designs and the compensation capacitance can accordingly be reduced, resulting in higher bandwidth and slew rate. Use the typical operating curves as a guide to select CC and RC for the application. PA05U P r o d u c t I n n o v a t i o nF r o m PA05 • PA05A 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. 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