PA46 APEX | Alldatasheet

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Technical content

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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

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 program- mable. 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 TYPICAL APPLICATION PA46 +80 R C C C R CL R I –20 C F R D R F R S YOKE VI ±2.5A 7µSec Retrace Horizontal Deflection Coil Amplifiers 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. CC1 CC2 Q19 Q17 Q16 Q15Q14 Q9 Q10 Q21Q20 –VS +IN –IN Q11 Q12 Q13 Q24 D1 Q2 SHDN Q5 Q6 +VS CURRENT SENSE OUTPUT DRIVE IQ 10896745123 –IN +IN SHDN –VS OUT +V S IQ C C1 C C2 ILIM R C R CL C C OUTPUT C C is NPO rated for full suppy voltage. Phase Compensation Gain C C R C ≥10 10pF 1K Ω ≥ 1 68pF 1K Ω HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739MICROTECHNOLOGY HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER PA46

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONSPA46 ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +V S to –VS 150V OUTPUT CURRENT, continuous within SOA 5A POWER DISSIPATION, continuous @ T C = 25°C 75W INPUT VOLTAGE, differential ±16 V INPUT VOLTAGE, common mode ±VS TEMPERATURE, pin solder – 10 sec 220 °C TEMPERATURE, junction 150 °C TEMPERATURE, storage –65 to +150°C TEMPERATURE RANGE, powered (case) –55 to +125°C PARAMETER TEST CONDITIONS 1 MIN TYP MAX UNITS INPUT OFFSET VOLTAGE, initial 51 0 m V OFFSET VOLTAGE, vs. temperature Full temperature range 10 50 µV/°C OFFSET VOLTAGE, vs supply 81 5 µV/V OFFSET VOLTAGE, vs time 2 µV √kh BIAS CURRENT, initial 20 100 pA BIAS CURRENT, vs supply 2 pA/V OFFSET CURRENT, initial 200 pA INPUT IMPEDANCE, DC 1011 Ω INPUT CAPACITANCE 5p F COMMON MODE, voltage range ±VS–10 V COMMON MODE REJECTION, DC 90 106 dB NOISE, broad band 10kHz BW, R S = 1KΩ 10 µV RMS GAIN OPEN LOOP at 15Hz 94 106 dB GAIN BANDWIDTH PRODUCT @ 1MHz R L = 500Ω , CC = 10pF 4.5 MHz POWER BANDWIDTH C C = 10pF, 130V p-p, RL = 8Ω 66 kHz PHASE MARGIN Full temp range, CC = 68pF, RL = 10Ω 60 ° OUTPUT VOLTAGE SWING I O = 5A ±VS–10 ±VS–8V CURRENT, continuous 5 A SETTLING TIME to .1% 10V step, A V = –10 2 µs SLEW RATE C C = 10pF, RL = 8Ω 27 V/ µs CAPACITIVE LOAD A V = +1, CC = 68pF 10 nF RESISTANCE , no load R CL = 0 150 Ω POWER SUPPLY VOLTAGE 3 See Note 3 ±15 ±50 ±75 V CURRENT, quiescent 30 50 mA CURRENT, quiescent, class C 5m A THERMAL 2 RESISTANCE, AC junction to case F > 60Hz 1.3 °C/W RESISTANCE, DC junction to case F < 60Hz 1.7 °C/W RESISTANCE, junction to air Full temperature range 30 °C/W TEMPERATURE RANGE, case Meets full range specifications –25 +85 °C SPECIFICATIONS CAUTION 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. NOTES: 1. Unless otherwise noted TC = 25°C, CC = 10pF, RC = 1KΩ . DC input specifications are ± value given. Power supply voltage is typical rating. 2. 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. 3. Derate maximum supply voltage .5 V/°C below case temperature of 25°C. No derating is needed above TC = 25°C.

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com TYPICAL PERFORMANCE GRAPHS PA46 CURRENT LIMIT RESISTOR, R CL (Ω )Ω 0 25 50 75 100 125 CASE TEMPERATURE, T C (°C) POWER DERATING INTERNAL POWER DISSIPATION, P(W) –50 0 100 0.7 0.8 0.9 1.0 1.1 1.2 CURRENT LIMIT DRIFT 10 30 90 150 130110 TOTAL SUPPLY VOLTAGE, V S (V) NORMALIZED QUIESCENT CURRENT, I Q (X) .1 1 100 10M FREQUENCY, f (Hz) 120 SMALL SIGNAL RESPONSE OPEN LOOP GAIN, A(dB) 1.1 100 100K 10M –180 –135 –45 PHASE RESPONSE –90 10K 20K 200K 100K FREQUENCY, f (Hz) OUTPUT VOLTAGE, V (V )O 10 1K 10K 1M FREQUENCY, f (Hz) COMMON MODE REJECTION COMMON MODE REJECTION, CMR (dB) 100 FREQUENCY, f (Hz) 120 POWER SUPPLY REJECTION POWER SUPPLY REJECTION, PSR (dB) 100 OUTPUT CURRENT, I O (A) OUTPUT VOLTAGE SWING VOLTAGE DROP FROM SUPPLY, V S – VO (V) 10 1K 2K 4K FREQUENCY, f (Hz) .001 HARMONIC DISTORTION DISTORTION, THD (%) .020 1.000 10K4020 100 0 COMPENSATION CAPACITANCE, C C (pF) SLEW RATE SLEW RATE, SR(V/µs) 0.1 ABSOLUTE CURRENT LIMIT CURRENT LIMIT, I (A) 100 100K QUIESCENT CURRENT 0.5 1.0 –25 25 50 75 100 POWER RESPONSE PP 10 100 1K 10K 100K 1.0 10 1K 10K 100K 1M 10 10K 1M FREQUENCY, f (Hz) PHASE, (°)φ NORMALIZED CURRENT LIMIT, I LIM (X) 400 20K .002 .040 20 80 6040 100 200 125 +ILIM CASE TEMPERATURE, T ( °C)C 1.5 2.0 -ILIM 40K 400K 1M .004 .010 .100 .200 .400 TC = 25 °CTC –55 TC = +125 No Load 8Ω Load AV = 10 C C = 10pf R L = 8Ω 85W C C = 68pF C C = 10pF C C = 68pF C C = 10pF +V S –VS 85°C +OUT 85°C –OUT 25°C –OUT 25°C +OUT R L = 8Ω C C = 10pF C C = 68pF R L = 500Ω R L = 1KΩ R L = 500Ω

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 OPERATING CONSIDERATIONSPA46 GENERAL Please read Application Note 1 "General Operating Consid- erations" which covers stability, supplies, heat sinking, mount- ing, current limit, SOA interpretation, and specification inter- pretation. 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. CURRENT LIMIT 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. 0.83 – 0.05 * ICL R CL = ICL 0.83ICL = R CL + 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 applica- tion 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 resis- tance (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 and bypass capacitor combination should match the time constant of the sum-point resistance and sum-point capaci- tance. The PA46 is externally compensated and performance can be tailored to the application. The compensation network CC - R C 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 ampli- fier 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. SUPPLY TO OUTPUT DIFFERENTIAL, V S -VO (V) 4 6 8 10 20 40 60 100 200 OUTPUT CURRENT FROM +V S OR –VS, (A) 0.1 0.2 0.4 0.6 0.8 1.0 2.0 4.0 6.0 DC, T C = 85 DC, T C = 125 DC 200mS 100mS PULSE CURVES @ 10% DUTY CYCLE MAX SAFE OPERATING AREA 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 +V s (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 is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice. PA46U REV. C FEBRUARY 2001 © 2001 Apex Microtechnology Corp.