POWER OPERATIONAL AMPLIFIERS PA04 • PA04A HTTP://WWW.APEXMICROTECH.COM M I C R O T E C H N O L O G Y (800) 546-APEX (800) 546-2739 FEATURES • • • • • • • • PA04 HIGH INTERNAL DISSIPATION — 200 WATTS HIGH VOLTAGE, HIGH CURRENT — 200V, 20A HIGH SLEW RATE — 50V/µS 4 WIRE CURRENT LIMIT SENSING LOW DISTORTION EXTERNAL SLEEP MODE CONTROL OPTIONAL BOOST VOLTAGE INPUTS EVALUATION KIT — SEE EK04 ∆ USA TE9493 11 BeO APPLICATIONS • • • • • TYPICAL APPLICATION SONAR TRANSDUCER DRIVER LINEAR AND ROTARY MOTOR DRIVES YOKE/MAGNETIC FIELD EXCITATION PROGRAMMABLE POWER SUPPLIES TO ±95V AUDIO UP TO 400W The high power bandwidth and high voltage output of the PA04 allows driving sonar transducers via a resonant circuit including the transducer and a matching transformer. The load circuit appears resistive to the PA04. Control logic turns off the amplifier in sleep mode. Rf DESCRIPTION The PA04 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 PA04 is a highly flexible amplifier. The sleep mode feature allows ultra-low quiescent current for standby operation or load protection by disabling the entire amplifier. 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 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 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 will void product warranty. SLEEP +Vs 8 12 9 D1 Q5 Q6 D2 D3 Q10 D4 Q12 D5 1 2 12 PA04 7 R CL 11 10 TUNED TRANSFORMER Sonar Transducer Driver EXTERNAL CONNECTIONS I LIM Q13 11 SLEEP +INPUT COMP R CC C COMP -V BOOST 1 12 2 11 3 10 CURRENT LIMIT 9 +V BOOST 5 8 6 7 *+SUPPLY 4 * TOP VIEW CURRENT LIMIT OUTPUT -SUPPLY D6 –IN 1 +IN 2 Q14 Q15 10 I LIM Q17 Q19 D7 COMP D8 Q21 Q22 Q18 D9 7 OUT Q7 3 Q26 4 –V BOOST 5 Ri ULTRASONIC DRIVE -INPUT EQUIVALENT SCHEMATIC +VBOOST CONTROL LOGIC COMP PHASE COMPENSATION Gain 1 >3 ≥10 CC 470pF 220pF 100pF RC 120Ω 120Ω 120Ω CC RATED FOR FULL SUPPLY VOLTAGE Q20 –Vs 6 *See “BOOST OPERATION” paragraph. APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PA04 • PA04A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS BOOST VOLTAGE OUTPUT CURRENT, 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 PA04 TEST CONDITIONS 1 PARAMETER 200V SUPPLY VOLTAGE +20V 20A 200W ±20V ±VS 300°C 150°C –65 to +150°C –55 to +125°C MIN PA04A TYP MAX 5 30 15 30 10 .01 10 1011 13 10 50 MIN TYP MAX UNITS 2 10 * 10 5 * 5 * * 5 30 * * 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 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 Full temperature range Full temperature range Full temperature range Full temp. range, VCM = ±20V 100kHz BW, RS = 1KΩ ±VB-8 86 50 50 * * 98 10 20 20 GAIN OPEN LOOP, @ 15Hz GAIN BANDWIDTH PRODUCT POWER BANDWIDTH PHASE MARGIN Full temperature range, CC = 100pF IO = 10A RL = 4.5Ω, VO = 180V p-p CC = 100pF, RC = 120Ω Full temperature range 94 102 2 90 * 60 OUTPUT VOLTAGE SWING VOLTAGE SWING CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD RESISTANCE IO = 15A VBOOST = Vs + 5V, IO = 20A AV = 1, 10V step, RL = 4Ω AV = 10, CC = 100pF, RC = 120Ω Full temperature range, AV = +1 ±VS-8.8 ±VS-7.5 ±VS-6.8 ±VS-5.5 20 2.5 40 50 10 2 * * * * * * * POWER SUPPLY VOLTAGE Full temperature range CURRENT, quiescent, boost supply CURRENT, quiescent, total CURRENT, quiescent, total, sleep mode Full temperature range ±15 ±75 30 70 3 ±100 40 90 5 .3 .5 12 .4 .6 * * * * * * * * * V mA mA mA * * * * * °C/W °C/W °C/W °C THERMAL RESISTANCE, AC, junction to case3 RESISTANCE, DC, junction to case RESISTANCE4, junction to air TEMPERATURE RANGE, case NOTES: * 1. 2. 3. 4. CAUTION Full temperature range, F>60Hz Full temperature range, F<60Hz Full temperature range Meets full range specification –25 85 * * The specification of PA04A is identical to the specification for PA04 in applicable column to the left. 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. 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. Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz. The PA04 must be used with a heatsink or the quiescent power may drive the unit to junction temperatures higher than 150°C. The PA04 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. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 100 50 T = TA 0 0 25 50 75 100 125 TEMPERATURE, T (°C) 150 60 40 20 0 10 SMALL SIGNAL GAIN SMALL SIGNAL PHASE OPEN LOOP PHASE, Φ (°) CC = = 0p 10 CC F 47 F 0p CC 40 = F 0p 22 RC = 120Ω RL = 4Ω 0 1 R C = 120Ω R L = 4Ω –45 –90 CC = 470pF CC = 220pF CC = 100pF –135 –180 10 100 1K 10K 100K 1M 10M FREQUENCY,Ff (Hz) 1 COMMON MODE REJECTION 40 –5 0 25 + 5V 5 10 15 OUTPUT CURRENT, I O (A) 20 30 130 120 110 100 90 80 70 60 –50 –25 0 25 50 75 100 125 CASE TEMPERATURE, T C (°C) QUIESCENT CURRENT 1.1 pF .8 50 100 150 30 200 TOTAL SUPPLY VOLTAGE, VS (V) 60 00 .9 80 =1 1.0 POWER RESPONSE 200 180 150 120 100 pF NORMALIZED QUIESCENT CURRENT, I Q (X) 00 =3 10 15 20 TIME, t (µs) = VS V BO 2 20 100 300 1K 3K 10K 30K FREQUENCY, F (Hz) OST CC PO 4 pF 20 1.2 5 = VS =2 .001 30 0W = VB 6 70 PO = 1W .005 .002 0 0 T S OO CC .01 8 =4 .02 10 CC A V = 10 R L =4 Ω C C = 100pF, R C = 120 Ω ±Vs = 62V W HARMONIC DISTORTION O .05 C C = 470pF 2.5 1M P .1 A V = +1 5 –7.5 100 1K 10K 100K FREQUENCY, F (Hz) OUTPUT VOLTAGE SWING 12 CURRENT LIMIT –2.5 20 4Ω LOAD 20 PULSE RESPONSE OUTPUT VOLTAGE, VO (V) 60 .2 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) 7.5 80 0 10 10 40 RC = 120Ω 0 300 400 500 100 200 EXT. COMPENSATION CAPACITOR C C (pF) 100 1K 10K 100K 1M 10M FREQUENCY F (Hz) 0 80 COMMON MODE REJECTION, CMR (dB) 80 100 DISTORTION, THD (%) SLEW RATE, SR (V/µs) T = TC SLEW RATE 60 VOLTAGE DROP FROM SUPPLY, VS–VO (V) 150 POWER SUPPLY REJECTION 100 NORMALIZED CURRENT LIMIT, (%) POWER DERATING OUTPUT VOLTAGE, VO (VPP) 120 PA04 • PA04A POWER SUPPLY REJECTION, PSR (dB) INTERNAL POWER DISSIPATION, P(W) 200 OPEN LOOP GAIN RESPONSE, A(dB) TYPICAL PERFORMANCE GRAPHS 40 R C =120 Ω R L = 4.0 Ω 20 10K 20K 50K .2M .6M FREQUENCY, F (Hz) 1M APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] OPERATING CONSIDERATIONS PA04 • PA04A GENERAL SLEEP MODE OPERATION Please read the “General Operating Considerations” section, which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. Additional information can be found in the application notes. For information on the package outline, heatsinks, and mounting hardware, consult the “Accessory and Package Mechanical Data” section of the handbook. The EK04 Evaluation Kit makes prototype circuits a snap by providing an EK04PC proto circuit board, MS05 mating socket, HS11 heatsink and hardware kit. In the sleep mode, pin 12 (sleep) is tied to pin 9 (+VBOOST). This disables the amplifier’s internal reference and the amplifier shuts down except for a trickle current of 3 mA which flows into pin 12. Pin 12 should be left open if the sleep mode is not required. Several possible circuits can be built to take advantage of this mode. In Figure 2A a small signal relay is driven by a logic gate. This removes the requirement to deal with the common mode voltage that exists on the shutoff circuitry since the sleep mode is referenced to the +VBOOST voltage. In Figure 2B, circuitry is used to level translate the sleep mode input signal. The differential input activates sleep mode with a differential logic level signal and allows common mode voltages to ±VBOOST. 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. The value of the current limit resistor can be calculated as follows: .76 RCL = ILIMIT K1 LOGIC 9 12 Figure 2A. Sleep mode circuit. 9 +VBOOST SLEEP +VBOOST 560 Ω Rf Figure 1. Current Limit. + 10 Ri 1 11 CL 7 CL PA04 INPUT 2 RP 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. The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. t= t= 10 m OUTPUT CURRENT (A) D 5.0 C Tc D C 2.0 Tc = 1m s 10 D C = s Tc = 25 °C 85 °C C 1.0 .5 .2 100 5 10 20 50 SUPPLY TO OUTPUT DIFFERENTIAL (V) SLEEP - 1K Ω Q2 –VBOOST 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 12 5° 2 INPUT 470 Ω Figure 2B. Sleep mode circuit. SAFE OPERATING AREA (SOA) 20 12 Q1 LOGIC RCL RL NOTE: 470 Ω 200 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 330 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. 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. PA04U REV. I DECEMBER 1997 © 1997 Apex Microtechnology Corp.