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FEATURES
* MO-127 COPPER POWER DIPTM PACKAGE * HIGH INTERNAL POWER DISSIPATION -- 500 watts * HIGH VOLTAGE OPERATION -- 75V * VERY HIGH CURRENT -- 30 amps * INTERNAL SOA PROTECTION * OUTPUT SWINGS CLOSE TO SUPPLY RAILS * EXTERNAL SHUTDOWN CONTROL
APPLICATIONS
* * * * LINEAR AND ROTARY MOTOR DRIVES YOKE/MAGNETIC FIELD DEFLECTION PROGRAMMABLE POWER SUPPLIES to 68V TRANSDUCER/AUDIO TO 1000W
TYPICAL APPLICATION
12-PIN DIP PACKAGE STYLE CU

DESCRIPTION
The super power PA03 advances the state of the art in both brute force power and self protection against abnormal operating conditions. Its features start with a copper dip package developed by Apex to extend power capabilities well beyond those attainable with the familiar TO-3 package. The increased pin count of the new package provides additional control features, while the superior thermal conductivity of copper allows substantially higher power ratings. The PA03 incorporates innovative current limiting circuits limiting internal power dissipation to a curve approximating the safe operating area of the power transistors. The internal current limit of 35A is supplemented with thermal sensing which reduces the current limit as the substrate temperature rises. Furthermore, a subcircuit monitors actual junction temperatures and with a response time of less than ten milliseconds reduces the current limit further to keep the junction temperature at 175C. The PA03 also features a laser trimmed high performance FET input stage providing superior DC accuracies both initially and over the full temperature range.

EQUIVALENT SCHEMATIC

The PA03 output power stages contain fast reverse recovery diodes for sustained high energy flyback protection. This hybrid integrated circuit utilizes thick film resistors, ceramic capacitors and silicon semiconductors to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The MO-127 Copper, 12-pin Power DipTM package (see Package Outlines), is hermetically sealed and isolated from the internal circuits. Insulating washers are not recommended. IMPORTANT: Observe mounting precautions.

APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
PA03 * PA03A
SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder-10s TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMP. RANGE, case SHUTDOWN VOLTAGE, differential SHUTDOWN VOLTAGE, common mode TEST CONDITIONS 2 TC = 25C Full temperature range TC = 25C Full temperature range TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C Full temperature range Full temp. range, VCM = 20V Full temperature range Full temp. range, amp enabled Full temp. range, amp disabled Full temp. range, full load TC = 25C, full load TC = 25C, IO = 15A, VO = 88VPP Full temp. range, CC = 1.8nF TC = 25C, IO = 30A Full temp. range, IO = 12A Full temp. range, IO = 146mA TC = 25C TC = 25C, 10V step TC = 25C, CC - open Full temp. range, AV = 1 TC = -25C, disable TC = -25C, operate Full temperature range TC = 25C Full temperature range Full temp. range, F>60Hz Full temp. range, F<60Hz Full temperature range Sustained operation Meets full range specification MIN PA03 TYP .5 10 8 20 5 .01 2.5 1011 6 VS -10V 86 3.5 92 102 1 30 65 6.2 4.2 3.5 8 8 2 10 20 15 50 125 25 .22 .25 14 - 25 75 300 40 .28 .3 150 85 * * * * * * * * * * * * * * * * * * 108 100 .85 * * * * * * * * * * * MAX 2 30 50 50 * * 150V Internally limited 500W 25V VS 300C 175C -65 to +150C -55 to +125C 5V VS MIN PA03A TYP .25 5 * 10 3 * 1.5 * * * * * MAX .5 10 10 10 UNITS mV V/C V/V V/W pA pA/V pA pF V dB A V V dB MHz kHz V V V A s V/s nF s s V mA mA C/W C/W C/W C C
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC SHUTDOWN CURRENT4 SHUTDOWN VOLTAGE SHUTDOWN VOLTAGE GAIN OPEN LOOP GAIN at 10Hz GAIN BANDWIDTH PRODUCT at 1MHz POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING3 VOLTAGE SWING3 VOLTAGE SWING3 CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD SHUTDOWN DELAY POWER SUPPLY VOLTAGE CURRENT, quiescent6 CURRENT, disable mode THERMAL RESISTANCE, AC junction to case5 RESISTANCE, DC junction to case RESISTANCE, junction to ambient TEMPERATURE, junction TEMPERATURE RANGE, case
VS -7 VS -5 VS -4 30
* * * *
NOTES: * The specification of PA03A is identical to the specification for PA03 in applicable column to the left. 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. 2. The power supply voltage for all specifications is the TYP rating unless 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 both shutdown inputs are least 1V inside supply rails. If one of the shutdown inputs is tied to a supply rail, the current in that pin may increase to 2.4mA. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. The PA03 must be used with a heatsink or the quiescent power may drive the unit into thermal shutdown.
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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PA03 * PA03A

TYPICAL PERFORMANCE GRAPHS

APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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OPERATING CONSIDERATIONS
PA03 * PA03A

CAUTION
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850C to avoid generating toxic fumes.

EXTERNAL CONNECTIONS

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; heat sink selection; Apex's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
BALANCE CONTROL
The voltage offset of the PA03 may be externally adjusted to zero. To implement this adjustment install a 100 to 200 ohm potentiometer between pins 11 and 12 and connect the wiper arm to the positive supply. Bypass pins 11 and 12 each with at least a .01F ceramic capacitor. If the optional adjust provision is not used, connect both pins 11 and 12 to the positive supply.
MOUNTING PRECAUTIONS
The PA03 copper base is very soft and easily bent. Do not put any stress on the mounting ears of this package. This calls for caution when pushing the amplifier into certain types of packaging foam and particularly when inserting the device into a socket. Insert the amplifier into the socket only by pushing on the perimeter of the package lid. Pushing the unit into the socket by applying pressure to the mounting tabs will bend the base due to the high insertion force required. The base will then not contact the heatsink evenly resulting in very poor heat transfer. To remove a unit from a socket, pry the socket away from the heatsink so that the heatsink will support the amplifier base evenly. Recommended mounting torque is 8-10 in.-lbs. (.9-1.13 N*m).
OUTPUT STAGE SHUTDOWN
The entire power stage of the PA03 may be disabled using one of the circuits shown in Figure 1. There are many applications for this function. One is a load protection based on power delivered to the load or thermal rise. Another one is conservation of power when using batteries. The control voltage requirements accommodate a wide variety logic drivers. 1. CMOS operating at +5V can drive the control pins directly. 2. CMOS operating at greater than 5V supplies need a voltage divider. 3. TTL logic needs a pull up resistor to +5V to provide a swing to the fully disabled voltage (3.5V). When not using the shutdown feature, connect both pins 3 and 4 to common.
SAFE OPERATING AREA (SOA)
Due to the internal (non-adjustable) current limit of the PA03, worst case power dissipation calculations must assume current capability of 46 amps. Application specific circuits should be checked against the SOA curve when relying upon current limit for fault protection.
PHASE COMPENSATION
At low gain settings an external compensation capacitor is required to insure stability. In addition to the resistive feedback network, roll off or integrating capacitors must also be considered. A frequency of 1 MHz is most appropriate to calculate gain. Operation at gains below 10, without the external compensation capacitor opens the possibility of oscillations near output saturation regions when under load, the improper operation of the thermal shutdown circuit. This can result in amplifier destruction. At gains of 10 or more: 1. No external components are required. 2. Typical slew rate will be 8V/s. 3. Typical phase margin will be 70.
SAFE OPERATING AREA CURVES
Second breakdown limitations do apply to the PA03 but are less severe, since junction temperature limiting responds within 10ms. Stress levels shown as being safe for more than 10ms duration will merely cause thermal shutdown. Under normal operating conditions, activation of the thermal shutdown is a sign that the internal junction temperatures have reached approximately 175C. Thermal shutdown is a short term safety feature. If the conditions remain that cause thermal shutdown, the amplifier will oscillate in and out of shutdown, creating peak high power stresses, destroying useful signals, and reducing the reliability of the device.
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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PA03 * PA03A
At a gain of 3: 1. Connect a 470pF compensation capacitor between pins 9 and 10. 2. Typical slew rate will be 5V/s. 3. Typical phase margin will be 45. At unity gain: 1. Connect a 1.8nF compensation capacitor between pins 9 and 10. 2. Typical slew rate will be 1.8V/s. 3. Typical phase margin will be 65.

OPERATING CONSIDERATIONS

This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible ORDERS or omissions. All specifications prodlit@apexmicrotech.com APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 *inaccuracies(520) 690-8601 * EMAILare subject to change without notice. PA03U REV. I FEBRUARY 1998 (c) 1998 Apex Microtechnology Corp.
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