HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER PA46 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 • • • • • • MONOLITHIC MOS TECHNOLOGY PROGRAMMABLE IQ (5 or 50 mA MAX) LOW COST HIGH VOLTAGE OPERATION—150V HIGH SLEW RATE—27V/µs HIGH POWER—5A, 75W DISSIPATION APPLICATIONS • • • • MAGNETIC DEFLECTION PA AUDIO MOTOR DRIVE NOISE CANCELLATION TYPICAL APPLICATION DESCRIPTION The PA46 is a high power monolithic MOSFET operational amplifier that achieves performance levels unavailable even in many hybrid amplifier designs. Inputs are protected from excessive common mode and differential mode voltages as well as static discharge. The safe operating area (SOA) has no second breakdown limitations and can be observed with all type loads by choosing an appropriate current limiting resistor. External compensation provides the user flexibility in choosing optimum gain and bandwidth for the application. Class C operation with resulting low quiescent current is pin programmable. A shutdown input turns off the output stage. This circuit utilizes a beryllia oxide (BeO) substrate to minimize thermal resistance. The 10-pin power SIP package is electrically isolated. EQUIVALENT SCHEMATIC Q2 3 SHDN Q24 Q5 Q6 Q7 Q3 Q8 D2 D4 D5 –IN 1 Q11 Q12 Q20 CC1 8 9 CC2 2 +IN Q9 7 IQ D3 Q21 Q10 Q13 Q14 RC 2 VI PA46 1 RCL 5 10 CF 4 YOKE RD –20 RF RS ±2.5A 7µSec Retrace Horizontal Deflection Coil Amplifiers Q16 OUTPUT DRIVE 5 EXTERNAL CONNECTIONS 10 CURRENT SENSE Q15 Package: SIP02 OUTPUT RCL RC Q17 Q19 D7 8 9 RI 1 –IN –VS 4 CC 6 Horizontal deflection amplifiers require both high speed and low distortion. The speed at which current can be changed in a deflection coil is a function of the voltage available from the op amp. In this application an 80 volt power supply is used for the retrace polarity to provide a 7 µSec retrace time, half of which is required for amplifier slewing. This circuit can perform 15.75 KHz deflection in up to 50µH coils at up to 5A p-p. 6 +VS D1 +80 2 3 4 5 6 +IN SHDN –VS OUT +VS CC 7 8 9 IQ CC1 CC2 10 ILIM CC is NPO rated for full suppy voltage. Phase Compensation RC Gain CC ≥10 10pF 1KΩ ≥1 68pF 1KΩ APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL firstname.lastname@example.org ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PA46 SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, continuous within SOA POWER DISSIPATION, continuous @ TC = 25°C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder – 10 sec TEMPERATURE, junction TEMPERATURE, storage TEMPERATURE RANGE, powered (case) ABSOLUTE MAXIMUM RATINGS 150V 5A 75W ±16 V ±VS 220°C 150°C –65 to +150°C –55 to +125°C SPECIFICATIONS TEST CONDITIONS1 PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs supply OFFSET VOLTAGE, vs time BIAS CURRENT, initial BIAS CURRENT, vs supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE, voltage range COMMON MODE REJECTION, DC NOISE, broad band 10kHz BW, RS = 1KΩ GAIN OPEN LOOP at 15Hz GAIN BANDWIDTH PRODUCT @ 1MHz POWER BANDWIDTH PHASE MARGIN RL = 500Ω, CC = 10pF CC = 10pF, 130V p-p, RL = 8Ω Full temp range, CC = 68pF, RL = 10Ω OUTPUT VOLTAGE SWING CURRENT, continuous SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD RESISTANCE , no load POWER SUPPLY VOLTAGE3 CURRENT, quiescent CURRENT, quiescent, class C THERMAL2 RESISTANCE, AC junction to case RESISTANCE, DC junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: 1. 2. 3. CAUTION MIN TYP MAX UNITS 5 10 8 10 50 15 2 100 2 200 106 10 mV µV/°C µV/V µV √kh pA pA/V pA Ω pF V dB µV RMS 94 106 4.5 66 60 dB MHz kHz ° ±VS–10 5 ±VS–8 V A µs V/µs nF Ω Full temperature range 20 ±VS–10 90 IO = 5A 10V step, AV = –10 CC = 10pF, RL = 8Ω AV = +1, CC = 68pF RCL = 0 See Note 3 F > 60Hz F < 60Hz Full temperature range Meets full range specifications 1011 5 2 27 10 150 ±15 ±50 30 ±75 50 5 V mA mA 1.3 1.7 °C/W °C/W °C/W °C 30 –25 +85 Unless otherwise noted TC = 25°C, CC = 10pF, RC = 1KΩ. DC input specifications are ± value given. Power supply voltage is typical rating. 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 heatsink data sheet. Derate maximum supply voltage .5 V/°C below case temperature of 25°C. No derating is needed above TC = 25°C. The PA46 is constructed from MOSFET transistors. ESD handling procedures must be observed. The exposed substrate is beryllia (BeO). 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 PA46 0.7 –50 –25 0 25 50 75 100 125 CASE TEMPERATURE, TC (°C) SMALL SIGNAL RESPONSE POWER RESPONSE 200 PHASE, φ (°) OPEN LOOP GAIN, A(dB) CC = 10pF –45 CC = 10pF CC = 68pF 40 .1 1 –90 CC = 68pF –135 RL = 1KΩ RL = 500Ω 0 RL = 500Ω 10 100 1K 10K 100K 1M 10M FREQUENCY, f (Hz) –180 .1 HARMONIC DISTORTION 1.000 .200 .100 .040 .020 85W .010 .004 1W 80 60 40 20 10 100 1K 10K 100K FREQUENCY, f (Hz) 1M 40 40 CC = 68pF 20 R L = 8Ω 10 8 6 4 10K 20K 40K 100K 200K 400K FREQUENCY, f (Hz) 1M QUIESCENT CURRENT 1.5 No Load 30 25 = °C TC 1.0 20 10 0 20 40 60 80 COMPENSATION CAPACITANCE, C C (pF) POWER SUPPLY REJECTION, PSR (dB) COMMON MODE REJECTION, CMR (dB) COMMON MODE REJECTION 100 CC = 10pF 2.0 8Ω Load .002 5W .001 10 20 40 100 400 1K 2K 4K 10K 20K FREQUENCY, f (Hz) 100 80 60 10 100 1K 10K 100K 1M 10M FREQUENCY, f (Hz) SLEW RATE SLEW RATE, SR(V/µs) DISTORTION, THD (%) .400 1 50 AV = 10 CC = 10pf RL = 8 Ω 1.0 0.1 10 CURRENT LIMIT RESISTOR, R CL (Ω) Ω PHASE RESPONSE 0 120 80 -I LIM –4 5° C 25 50 75 100 125 CASE TEMPERATURE, TC (°C) 0.8 0 –5 0 0.9 = 0 1.0 +I LIM C 20 4 T 40 1.1 CURRENT LIMIT, I (A) 60 ABSOLUTE CURRENT LIMIT OUTPUT VOLTAGE, VO (VPP ) 80 CURRENT LIMIT DRIFT 1.2 VOLTAGE DROP FROM SUPPLY, VS – VO (V) NORMALIZED QUIESCENT CURRENT, IQ(X) POWER DERATING 100 NORMALIZED CURRENT LIMIT, ILIM (X) INTERNAL POWER DISSIPATION, P(W) TYPICAL PERFORMANCE GRAPHS POWER SUPPLY REJECTION 120 100 +VS 80 60 40 –VS 20 0 10 100 1K 10K 100K FREQUENCY, f (Hz) 1M TC = 5°C +12 0.5 10 30 50 70 90 110 130 150 TOTAL SUPPLY VOLTAGE, VS (V) OUTPUT VOLTAGE SWING 10 85°C – OUT 8 85°C +OUT 6 25°C +OUT 25°C – OUT 4 2 0 2 4 OUTPUT CURRENT, I O (A) APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL email@example.com OPERATING CONSIDERATIONS PA46 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.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The "Application Notes" and "Technical Seminar" sections contain a wealth of information on specific types of applications. Package outlines, heat sinks, mounting hardware and other accessories are located in the "Packages and Accessories" section. Evaluation Kits are available for most Apex product models, consult the "Evaluation Kit" section for details. For the most current version of all Apex product data sheets, visit www.apexmicrotech.com. and bypass capacitor combination should match the time constant of the sum-point resistance and sum-point capacitance. The PA46 is externally compensated and performance can be tailored to the application. The compensation network CCRC must be mounted closely to the amplifier pins 8 and 9 to avoid noise coupling to these high impedance nodes. SAFE OPERATING AREA (SOA) The MOSFET output stage of this power operational amplifier has limitations from its channel temperature. NOTE: The output is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. CURRENT LIMIT 0.83 – 0.05 * ICL RCL = ICL ICL = 0.83 RCL + 0.05 with a maximum practical value of 16Ω. RCL is added to the typical value of output resistance and affects the total possible swing since it carries the load current. The swing reduction, VR can be established VR = IOUT * RCL. INPUT PROTECTION The PA46 inputs are protected against common mode voltages up to the supply rails, differential voltages up to ±16 volts and static discharge. Differential voltages exceeding 16 volts will be clipped by the protection circuitry. However, if more than a few milliamps of current is available from the input drive source, the protection circuitry could be destroyed. The protection circuitry includes 300 ohm current limiting resistors at each input. This security may be insufficient for severe overdrive of the input. Adding external resistors to the application which limits severe input overdrive current to 1mA, will prevent damage. STABILITY The PA46 has sufficient phase margin when compensated for unity gain to be stable with capacitive loads of at least 10nF. However, the low pass circuit created by the sum-point (–in) capacitance and the feedback network may add phase shift and cause instabilities. As a rule, the sum-point load resistance (input and feedback resistors in parallel) should be 1k ohm or less. Alternatively, use a bypass capacitor across the feedback resistor. The time constant of the feedback resistor SAFE OPERATING AREA 6.0 OUTPUT CURRENT FROM +VS OR –VS, (A) Current limiting is achieved by developing 0.83V on the amplifiers current sense circuit by way of an internal tie to the output drive (pin 5) and an external current sense line (pin 10). A sense resistor RCL is used to relate this sense voltage to a current flowing from output drive. 4.0 DC DC 2.0 ,T C DC C = m S 0m S 85 °C ,T 1.0 0.8 = 10 0 20 12 5° C 0.6 0.4 0.2 PULSE CURVES @ 10% DUTY CYCLE MAX 0.1 4 6 8 10 20 40 60 100 200 SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V) SHUTDOWN Pin 3 (SHDN) will shut off the output stage when at least 90µA is pulled from pin 3 to any voltage at least 3 volts less than +Vs (ground, for example). BIAS CLASS OPTION FOR LOWER QUIESCENT CURRENT Normally pin 7 (IQ ) is left open. When pin 7 is tied to pin 8 (CCI ) the quiescent current in the output stage is disabled. This results in lower quiescent current, but also class C biasing of the output stage. This data sheet has been carefully checked and is believed to be reliable, however, no responsibility assumed forARIZONA possible inaccuracies omissions. All specifications are subject to change without notice. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD •isTUCSON, 85741 •or USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 PA46U REV. C FEBRUARY 2001 © 2001 Apex Microtechnology Corp.