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| TPA02/ TPA02A Power Operational Amplifier THALER CORPORATION * 2015 N. FORBES BOULEVARD * TUCSON, AZ. 85745 * (520) 882-4000 FEATURES * COMMON COLLECTOR OUTPUT STAGE * CLOSE TO RAIL OUTPUT - 1.2V TO RAIL * HIGH SLEW RATE - 20V/sec. * FAST SETTLING TIME - 600ns * HIGH POWER BANDWIDTH - 350kHz * HIGH OUTPUT CURRENT - 5A PEAK * LOW CROSSOVER DISTORTION - CLASS A/B * LOW INPUT CURRENT - FET INPUT EQUIVALENT SCHEMATIC DESCRIPTION The TPA02 and TPA02A are fast, high output current operational amplifiers designed to drive resistive or reactive loads. The common collector output stage swings close to the supply rails and is protected against inductive kickback by diodes to the rails. The safe operating area (SOA) can be selected by external current limiting resistors. The output stage is biased for class A/B operation to achieve low distortion. The amplifiers are internally compensated but are not suitable for use as unity gain followers. EXTERNAL CONNECTIONS AND PIN CONFIGURATIONS RCL+ OUT OUT 4 -IN 5 6 7 POWER DELIVERY EFFICIENCY AND LOW DISTORTION Due to the common collector output stage, these amplifiers can deliver power with high efficiency particularly for low voltage applications. In the example application below the TPA02 delivers power with high efficiency and due to the high power bandwidth also low distortion. +Vs 3 2 CL+ 1 TOP VIEW 8 CL- RCLTPA02/02A Rev. A Sept. 2006 +IN -Vs TPA02/TPA02A ABSOLUTE MAXIMUM RATINGS Supply Voltage Output Current, within SOA Power Dissipation, internal1 Input Voltage, differential Input Voltage, common mode 38V 5A 48W VS -5V VS -2V Temperature, pin solder - 10s Temperature, junction1 Temperature range, storage Operating temperature range, case 300C 150C -65 to +150C -55 to +125C SPECIFICATIONS PARAMETER INPUT Offset Voltage, initial Offset Voltage, vs. temp. Offset Voltage, vs. supply Offset Voltage, vs. power Bias Current, initial Bias Current, vs. temp. Bias Current, vs. supply Offset Current, initial Offset Current, vs. temp. Input Impedance, DC Input Capacitance Common Mode Volt. Range5, Pos Common Mode Volt. Range5, Neg Common Mode Rejection, DC GAIN Open Loop Gain at 10Hz Open Loop Gain at 10Hz Gain Bandwidth Product (1MHz) Power Bandwidth Phase Margin OUTPUT Voltage Swing3 Voltage Swing3 Current, peak Settling Time to .1%, Slew Rate Capacitive Load Harmonic Distortion Small Signal, rise/fall time Small Signal, overshoot POWER SUPPLY Voltage Current, quiescent THERMAL Resistance, AC junction to case4 Resistance, DC junction to case Resistance, junction to air Temperature Range, case CONDITIONS 2,6 MIN TPA02 TYP MAX MIN TPA02A TYP MAX UNIT S mV V/C V/V V/W pA pA/C pA/V pA pa/C G pF V V db db db MHz kHz o V V A s V/s % ns % * * * * +125 V mA C/W C/W C/W C T c= 25C full temperature range Tc = 25C T c= 25C Tc = 25C Tc = 85C Tc = 25C Tc = 25C Tc = 85C Tc = 25C Tc = 25C full temperature range full temperature range full temperature range Tc = 25C, 1k load Full temp range, 10k load Tc = 25C, 10 load Tc = 25C, 10 load Full temp range, 10 load Tc = 25C,Io = 5A, RCL = .08 full temp range, Io = 2A Tc = 25C T c= 25C, 2V step Tc = 25C full temp range, Av > 10 Po = .5W, F = 1kHz, RL=10 RL = 10, Av = 1 RL = 10, Av = 1 full temp range Tc = 25C F > 60Hz F > 60Hz Meets full range specs 5 10 10 6 50 .01 25 1000 3 +Vs-3 +Vs+5 100 103 100 4.5 350 30 Vs-3 Vs-1.2 10 50 200 200 100 100 1 * * * 25 * 15 * * * * * * * * * * * * * * * * * * * * * * * -55 3 25 100 * 50 * +Vs-6 -Vs+6 70 * * * 86 * Vs-4 Vs-2 5 13 * * * * .6 20 SOA .004 100 10 15 27 1.9 2.4 30 19 40 2.1 2.6 +85 7 * -25 Notes: *Same as previous Model. 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 2. The power supply voltage for all specifications is the typical rating unless otherwise noted as a test condition. 3. +Vs and -Vs denote the positive and negative supply rail respectively. Total Vs is measured from +Vs to -Vs. 4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 5. Exceeding CMV range can cause the output to latch. 6. Full temperature specifications are guaranteed but not 100% tested. Caution: The internal substrate contains beryllia (BeO). Do not crush, break, machine or subject the substrate to temperatures in excess of 850C. TPA02/02A Rev. A Sept. 2006 TYPICAL PERFORMANCE CURVES POWER DERATING INTERNAL POWER DISSIPATION (W) 50 NORMALIZED BIAS CURRENT (X) 40 T=TC 30 20 10 T=TA 0 0 25 50 75 100 125 CASE TEMPERATURE oC 256 64 CURRENT LIMIT (A) 16 4 1 .25 .06 -15 5 25 45 65 85 105 CASE TEMPERATURE oC BIAS CURRENT 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0 -25 CURRENT LIMIT RCL = 0.3 RCL = 0.62 0 25 50 75 100 125 CASE TEMPERATURE oC SMALL SIGNAL RESPONSE 120 100 OPEN LOOP GAIN (dB) 80 PHASE (o) 60 40 20 0 -20 1 10 100 1K 10K 100K 1M 10M FREQUENCY (Hz) 0 -30 -60 -90 -120 -150 -180 -210 1 PHASE RESPONSE 30 POWER RESPONSE abs(+Vs)+abs(-Vs)=36V OUTPUT VOLTAGE (VP-P) 23 18 13 abs(+Vs)+abs(-Vs)=30V 10 7.8 6.0 .1M 10 100 1K 10K 100K 1M 10M .2M .3M .5M .7M 1M FREQUENCY (Hz) FREQUENCY (Hz) COMMON MODE REJECTION 120 COMMON MODE REJECTION (dB) 100 80 60 40 20 0 .3 PULSE RESPONSE 100 VIN = 2V, tr = 50ns OUTPUT VOLTAGE (V) .2 .1 0 -.1 -.2 -.3 INPUT NOISE VOLTAGE (nV/Hz)) 70 50 40 30 20 INPUT NOISE 1 10 100 1K 10K 100K 1M 10M 0 .5 1.0 1.5 10 10 100 1K 10K 100K FREQUENCY (Hz) TIME (s) FREQUENCY (Hz) HARMONIC DISTORTION 3 1 DISTORTION (%) 0.3 0.1 0.03 0.01 Po QUIESCENT CURRENT 1.6 NORMALIZED CURRENT (IO) 6 VOLTAGE DROP FROM SUPPLY (V) 5 4 OUTPUT VOLTAGE SWING Gain = 1 Load = 10 1.4 1.2 1.0 0.8 0.6 0.4 Po = 5 W 0m = W .5 3 +Vo Po W =5 2 1 0 3 6 9 12 15 OUTPUT CURRENT (A) TPA02/02A Rev. A Sept. 2006 0.003 100 300 1K 3K 10K 30K 100K FREQUENCY (Hz) -25 0 25 50 75 100 125 CASE TEMPERATURE oC DISCUSSION OF PERFORMANCE SAFE OPERATING AREA (SOA) SOA 5.0 4.0 3.0 T T C C These simplified limits may be exceed with further analysis using the operating conditions for a specific application. 2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rails or shorts to common if the current limits are set as follows at Tc = 85C. Short to VS C,L or EMF Load 0.5A 0.7A 1.6A Short to Common 1.7A 2.8A 4.2A T OUTPUT CURRENT FROM +Vs OR -Vs (A) C = =7 25 o C 2.0 1.5 1.0 0.7 0.5 0.3 0.2 2 3 5 T C =1 0o C 00 o C BR SE t = 5 m EA CO s KD N OD W N E ST Y AD = 12 5o C A ST TE TH ER MA L Vs 18V 15V 10V 25 30 40 7 10 15 20 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V) CURRENT LIMIT Proper operation requires the use of two current limit resistors, connected as shown in the external connections diagram. The minimum value for RCL is 0.12 ohm, however for optimum reliability it should be set as high as possible. 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. The following guidelines may save extensive analytical efforts: 1) Under transient conditions, capacitive and dynamic* loads up to the following maximums are safe: Capacitive Load ILIM = 2A ILIM = 5A 2mF 10mF 25mF 0.7mF 2.2mF 10mF Inductive Load ILIM = 2A ILIM= 5A 0.2H 0.7H 5H 10mH 25mH 50mH DEVICE MOUNTING The case (mounting flange) is electrically isolated and should be mounted directly to a heatsink with thermal compound. Screws with Belville spring washers are recommended to maintain positive clamping pressure on heatsink mounting surfaces. Long periods of thermal cycling can loosen mounting screws and increase thermal resistance. Since the case is electrically isolated (floating) with respect to the internal circuits, it is recommended to connect it to common or other convenient AC ground potential. Vs 18V 15V 10V *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 = 5A, or 17V below the supply rail with ILIM = 2A while the amplifier is current limiting, the inductor should be capacitively coupled or the current limit must be lowered to meet SOA criteria. TPA02/02A Rev. A Sept. 2006 MECHANICAL TO3-8 Package TPA02/02A Rev. A Sept. 2006 |
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