TPA02/ TPA02A Power Operational Amplifier THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000 FEATURES EQUIVALENT SCHEMATIC · COMMON COLLECTOR OUTPUT STAGE · CLOSE TO RAIL OUTPUT – ±1.2V TO RAIL · HIGH SLEW RATE – 20V/µsec. · FAST SETTLING TIME – 600ns · HIGH POWER BANDWIDTH – 350kHz · HIGH OUTPUT CURRENT - ±5A PEAK · LOW CROSSOVER DISTORTION – CLASS A/B · LOW INPUT CURRENT – FET INPUT 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. 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. EXTERNAL CONNECTIONS AND PIN CONFIGURATIONS RCL+ OUT +Vs 2 3 CL+ 1 OUT 4 -IN TOP VIEW 5 8 6 +IN 7 -Vs CL- RCLTPA02/02A Rev. A Sept. 2006 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 SPECIFICATIONS TPA02 CONDITIONS 2,6 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 T c= 25°C full temperature range Tc = 25°C T c= 25°C Tc = 25°C Tc = 85°C Tc = 25°C Tc = 25°C Tc = 85°C Tc = 25°C Tc = 25°C full temperature range full temperature range full temperature range GAIN Open Loop Gain at 10Hz Open Loop Gain at 10Hz Gain Bandwidth Product (1MHz) Power Bandwidth Phase Margin Tc = 25°C, 1kΩ load Full temp range, 10kΩ load Tc = 25°C, 10Ω load Tc = 25°C, 10Ω load Full temp range, 10Ω load 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 Tc = 25°C,Io = 5A, RCL = .08Ω full temp range, Io = 2A Tc = 25°C T c= 25°C, 2V step Tc = 25°C full temp range, Av > 10 Po = .5W, F = 1kHz, RL=10Ω RL = 10Ω, Av = 1 RL = 10Ω, Av = 1 POWER SUPPLY Voltage Current, quiescent full temp range Tc = 25°C THERMAL Resistance, AC junction to case4 Resistance, DC junction to case Resistance, junction to air Temperature Range, case Notes: MIN +Vs-6 -Vs+6 70 86 ±Vs-4 ±Vs-2 5 13 ±7 F > 60Hz F > 60Hz Meets full range specs *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. -25 TPA02A TYP MAX ±5 ±10 ±10 ±6 50 ±10 ±50 .01 25 300°C 150°C -65 to +150°C -55 to +125°C MIN 200 200 * * * 103 100 4.5 350 30 * ±Vs-3 * * * ±Vs-1.2 .6 20 SOA .004 100 10 * ± 15 27 ± 19 40 1.9 2.4 30 2.1 2.6 +85 MAX UNIT S ±1 * * * 25 ±3 ±25 * * * * * mV µV/°C µV/V µV/W pA pA/°C pA/V pA pa/°C GΩ pF V V db * * * * * db db MHz kHz o * * V V A µs V/µs * 15 100 100 1000 3 +Vs-3 +Vs+5 100 TYP * -55 100 * 50 * * * * * * * % ns % * * * * V mA * * * * * °C/W °C/W °C/W °C +125 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 BIAS CURRENT 40 T=TC 30 20 10 T=TA 0 17.5 64 15.0 16 4 1 .25 25 50 75 100 -15 125 5 RCL = 0.62Ω 7.5 5.0 25 45 65 85 0 -25 105 0 25 50 75 100 CASE TEMPERATURE oC PHASE RESPONSE POWER RESPONSE 120 0 30 100 -30 23 80 -60 60 -90 125 40 OUTPUT VOLTAGE (VP-P) abs(+Vs)+abs(-Vs)=36V PHASE (o) -120 20 -150 0 -180 -210 -20 1 10 100 1K 10K 100K 1M 10M 1 10 100 FREQUENCY (Hz) 1K COMMON MODE REJECTION 100 .2 OUTPUT VOLTAGE (V) 80 60 40 0 -.1 -.3 10K 100K 1M 10M HARMONIC DISTORTION 0 .5 5 Po 0.03 Po 0.01 Po = W .5 W =5 0.003 1K 3K 10K FREQUENCY (Hz) 30 20 10 100 30K 100K 1K 10K 100K FREQUENCY (Hz) OUTPUT VOLTAGE SWING 6 1.4 1.2 1.0 0.8 0.6 0.4 300 40 10 1.5 VOLTAGE DROP FROM SUPPLY (V) = W 0m .7M 1M 50 QUIESCENT CURRENT NORMALIZED CURRENT (IO) 0.3 100 1.0 1.6 Gain = 1 Load = 10Ω .5M 70 TIME (µs) 3 .3M INPUT NOISE .1 FREQUENCY (Hz) 0.1 .2M 100 -.2 20 1 7.8 FREQUENCY (Hz) VIN = ±2V, tr = 50ns 1K abs(+Vs)+abs(-Vs)=30V 10 PULSE RESPONSE .3 10 100 13 FREQUENCY (Hz) 120 1 18 6.0 .1M 10K 100K 1M 10M INPUT NOISE VOLTAGE (nV/√Hz)) OPEN LOOP GAIN (dB) SMALL SIGNAL RESPONSE COMMON MODE REJECTION (dB) 10.0 CASE TEMPERATURE oC CASE TEMPERATURE oC 0 RCL = 0.3Ω 12.5 2.5 .06 0 DISTORTION (%) CURRENT LIMIT 256 CURRENT LIMIT (A) NORMALIZED BIAS CURRENT (X) INTERNAL POWER DISSIPATION (W) POWER DERATING 50 -25 0 25 50 75 CASE TEMPERATURE oC 100 125 5 4 3 +Vo 2 1 0 3 6 9 12 15 OUTPUT CURRENT (A) TPA02/02A Rev. A Sept. 2006 DISCUSSION OF PERFORMANCE SAFE OPERATING AREA (SOA) These simplified limits may be exceed with further analysis using the operating conditions for a specific application. 5.0 4.0 T C T 3.0 C T C 2.0 C = 0o C 00 o C 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 = 85°C. 5o C A ST 12 TE 1.0 BR SE t = 5 m EA CO s KD N O D W N 25 o C Y AD T 1.5 =1 =7 = E ST OUTPUT CURRENT FROM +Vs OR -Vs (A) SOA 0.7 ±Vs TH ER MA L 0.5 18V 15V 10V 0.3 Short to ±VS C,L or EMF Load 0.5A 0.7A 1.6A Short to Common 1.7A 2.8A 4.2A 0.2 2 3 5 7 10 15 20 25 30 40 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V) 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: ±Vs 18V 15V 10V 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 •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. 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. 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. TPA02/02A Rev. A Sept. 2006 MECHANICAL TO3-8 Package TPA02/02A Rev. A Sept. 2006