High-Voltage, High-Current Operational Amplifier …

1 1994 Burr-Brown CorporationPDS-1250 BPrinted in September, 1995 high - voltage , high -CurrentOPERATIONAL AMPLIFIERDESCRIPTIONThe OPA544 is a high - voltage / High-Current opera-tional Amplifier suitable for driving a wide variety ofhigh power loads. high performance FET op ampcircuitry and high power output stage are combined ona single monolithic OPA544 is protected by internal current limit andthermal shutdown OPA544 is available in industry-standard5-lead TO-220 and 5-lead surface-mount power pack-ages. Its copper tab allows easy mounting to a heatsink for excellent thermal performance. It is specifiedfor operation over the extended industrial temperaturerange, 40 C to +85 C. OPA544 FEATURESlHIGH OUTPUT current : 2A minlWIDE POWER SUPPLY RANGE: 10 to 35 VlSLEW RATE: 8V/ slINTERNAL current LIMITlTHERMAL SHUTDOWN PROTECTIONlFET INPUT: IB = 100pA maxl5-LEAD TO-220 PLASTIC PACKAGEl5-LEAD SURFACE MOUNT PACKAGEAPPLICATIONSlMOTOR DRIVERlPROGRAMMABLE POWER SUPPLYlSERVO AMPLIFIERlVALVES, ACTUATOR DRIVERlMAGNETIC DEFLECTION COIL DRIVERlAUDIO AMPLIFIERV VOV+VINVIN123455-Lead TO-220andStagger-FormedTO-220+ Tab is connectedto V VOV+VINVIN12345+ Tab is connectedto V MountInternational Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S.

2 Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111 Internet: FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132 SBOS038 2 OPA544 SPECIFICATIONSAt TCASE = +25 C, VS = 35V, unless otherwise information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumesno responsibility for the use of this information, and all use of such information shall be entirely at the user s own risk. Prices and specifications are subject to changewithout notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrantany BURR-BROWN product for use in life support devices and/or VOLTAGEI nput Offset voltage 1 5mVvs TemperatureSpecified Temperature Range 10 V/ Cvs Power SupplyVS = 10V to 35V 10 100 V/VINPUT BIAS current (1)Input Bias CurrentVCM = 0V 15 100pAvs TemperatureSee Typical CurveInput Offset CurrentVCM = 0V 10 100pANOISEI nput voltage NoiseNoise Density, f = 1kHz36nV/ HzCurrent Noise Density, f = 1kHz3fA/ HzINPUT voltage RANGEC ommon-Mode Input Range, PositiveLinear Operation(V+) 6(V+) 4 VNegativeLinear Operation(V ) +6(V )

3 +4 VCommon-Mode RejectionVCM = VS 6V90106dBINPUT IMPEDANCED ifferential1012 || 8 || pFCommon-Mode1012 || 10 || pFOPEN-LOOP GAINOpen-Loop voltage GainVO = 30V, RL = 1k 90103dBFREQUENCY RESPONSEGain Bandwidth ProductRL = 15 Rate60Vp-p, RL = 15 58V/ sFull-Power BandwidthSee Typical CurveSettling Time = 10, 60V Step25 sTotal Harmonic DistortionSee Typical CurveOUTPUTV oltage Output, PositiveIO = 2A(V+) 5(V+) = 2A(V ) +5(V ) + = (V+) (V+) = (V ) +4(V ) + OutputSee SOA CurvesShort-Circuit Current4 APOWER SUPPLYS pecified Operating voltage 35 VOperating voltage Range 10 35 VQuiescent CurrentIO = 0 12 15mATEMPERATURE RANGEO perating 40+85 CStorage 40+125 CThermal Resistance, JCf > C/WThermal Resistance, JCDC3 C/WThermal Resistance, JANo Heat Sink65 C/WNOTES: (1) high -speed test at TJ = 25 C.

4 3 OPA544 Top ViewABSOLUTE MAXIMUM RATINGSS upply voltage , V+ to V .. 70 VOutput current .. See SOA CurveInput voltage .. (V ) to (V+) + Temperature .. 40 C to +125 CStorage Temperature .. 40 C to +125 CJunction Temperature .. 150 CLead Temperature (soldering 10s)(1)..300 CCONNECTION DIAGRAMSNOTE: (1) Vapor-phase or IR reflow techniques are recommended for solder-ing the OPA544F surface mount package. Wave soldering is not recommendeddue to excessive thermal shock and shadowing of nearby VOV+VINVIN12345+ Tab is connectedto V MountV VOV+VINVIN123455-Lead TO-220andStagger-FormedTO-220+ Tab is connectedto V : (1) For detailed drawing and dimension table, please see end of datasheet, or Appendix C of Burr-Brown IC Data SENSITIVITYThis integrated circuit can be damaged by ESD.

5 Burr-Brownrecommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handlingand installation procedures can cause damage can range from subtle performance degrada-tion to complete device failure. Precision integrated circuitsmay be more susceptible to damage because very smallparametric changes could cause the device not to meet itspublished INFORMATIONPACKAGE DRAWINGPRODUCTPACKAGENUMBER(1)OPA544T5-L ead TO-220315 OPA544T-1 5-Lead Stagger-Formed TO-220323 OPA544F5-Lead Surface-Mount325 4 OPA5441001k10k100k1 MCommon-Mode Rejection (dB)Frequency (Hz)COMMON-MODE REJECTION vs FREQUENCY1101009080706050401101001k10k10 0k10 voltage Noise (nV/ Hz)Frequency (Hz) voltage NOISE DENSITY vs FREQUENCY20406080100 75 50 250255075100125 Quiescent current (mA)Temperature ( C)QUIESCENT current vs TEMPERATURE131211109VS = 35 VVS = 10V 75 50 250255075100125 Limit current (A)Temperature ( C)

6 current LIMIT vs TEMPERATURE543210 75 50 250255075100125 Input Bias current (A)Temperature ( C)INPUT BIAS current vs TEMPERATURE10n1n100p10p1pIOSIB1101001k10 k100k1M10 MGain (dB)Frequency (Hz)OPEN-LOOP GAIN AND PHASE vs FREQUENCY120100806040200 20 Phase ( )0 45 90 135 180RL = 15 TYPICAL PERFORMANCE CURVESAt TCASE = +25 C, VS = 35V, unless otherwise noted. 5 OPA544012 3|VSUPPLY| |VOUT| (V)Output current (A)OUTPUT voltage SWING vs OUTPUT CURRENT543210|(V ) VO|(V+) VO35302520151050 Output voltage (V)MAXIMUM OUTPUT voltage vs FREQUENCYF requency (Hz)20k100k200kClippingSlew RateLimited1101001k10k100k1 MPower Supply Rejection (dB)Frequency (Hz)POWER SUPPLY REJECTION vs FREQUENCY12010080604020V+ SupplyV SupplyTYPICAL PERFORMANCE CURVES (CONT)At TCASE = +25 C, VS = 35V, unless otherwise noted.

7 75 50 250255075100125|VSUPPLY| |VOUT| (V)Temperature ( C)OUTPUT voltage SWING vs TEMPERATURE6543210IO = 2 AIO = + = +2 AIO = HARMONIC DISTORTION + NOISEvs 20kTHD + N (%)Frequency (Hz)RL = 15 100mW2W30W 75 50 250255075100125 Gain-Bandwidth Product (MHz)Temperature ( C)GAIN-BANDWIDTH PRODUCT AND SLEW RATEvs Rate (V/ S)9876SR SR+GBW 6 OPA544 TYPICAL PERFORMANCE CURVES (CONT)APPLICATIONS INFORMATIONF igure 1 shows the OPA544 connected as a basic non-inverting Amplifier . The OPA544 can be used in virtuallyany op amp configuration. Power supply terminals should bebypassed with low series impedance capacitors. The tech-nique shown, using a ceramic and tantalum type in parallelis recommended. Power supply wiring should have lowseries impedance and safe output current decreases as VS VO increases.

8 Outputshort-circuits are a very demanding case for SOA. A short-circuitto ground forces the full power supply voltage (V+ or V ) acrossthe conducting transistor. With VS = 35V the safe output currentis (at 25 C). The short-circuit current is approximately 4 Awhich exceeds the SOA. This situation will activate the thermalshutdown circuit in the OPA544. For further insight on SOA,consult Application Bulletin OPERATING AREAS tress on the output transistors is determined by the outputcurrent and the voltage across the conducting output transis-tor, VS VO. The power dissipated by the output transistor isequal to the product of the output current and the voltageacross the conducting transistor, VS VO. The Safe OperatingArea (SOA curve, Figure 2) shows the permissible range ofvoltage and 1.

9 Basic Circuit TCASE = +25 C, VS = 35V, unless otherwise = 1+ = 3R2R1+ZLVOR210k R15k F10 FOPA544V 35V+35VV+VIN+10 F200MV/divSMALL SIGNAL RESPONSEG = 3, CL = 1nF2 s/divFIGURE 2. Safe Operating |VS VO| (V)2050100 SAFE OPERATING AREA1041 Output current (A) = 25 CTC = 125 CTC = 85 COutput current maybe limited to lessthan 4A see LIMITThe OPA544 has an internal current limit set for approxi-mately 4A. This current limit decreases with increasingjunction temperature as shown in the typical curve, CurrentLimit vs Temperature. This, in combination with the thermalshutdown circuit, provides protection from many types ofoverload. It may not, however, protect for short-circuit toground, depending on the power supply voltage , ambienttemperature, heat sink and signal conditions.

10 7 OPA544 POWER DISSIPATIONP ower dissipation depends on power supply, signal and loadconditions. For dc signals, power dissipation is equal to theproduct of output current times the voltage across the con-ducting output transistor. Power dissipation can be mini-mized by using the lowest possible power supply voltagenecessary to assure the required output voltage resistive loads, the maximum power dissipation occursat a dc output voltage of one-half the power supply with ac signals is lower. Application BulletinAB-039 explains how to calculate or measure power dissi-pation with unusual signals and applications require a heat sink to assure that themaximum junction temperature is not exceeded. The heatsink required depends on the power dissipated and onambient conditions.