(800) 546-APEX (800) 546-2739 FEATURES COST WIDE COMMON
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PA34
(800) 546-APEX
(800) 546-2739
FEATURES
COST WIDE COMMON MODE RANGE Includes negative supply WIDE SUPPLY VOLTAGE RANGE Single supply: Split supplies: ±2.5V ±20V HIGH EFFICIENCY |Vs-2.8V| 2.5A HIGH OUTPUT CURRENT 2.5A INTERNAL CURRENT LIMIT DISTORTION
APPLICATIONS
HALF FULL BRIDGE MOTOR DRIVERS AUDIO POWER AMPLIFIER IDEAL SINGLE SUPPLY SYSTEMS Peripherals Automotive Avionic
TYPICAL APPLICATION
+28V Unit PA34 .1µF Unit PA34 .1µF +28V
DESCRIPTION
PA34 consists monolithic power 7-pin TO220 package. wide common mode input range includes negative rail, facilitating single supply applications. possible have "ground based" input driving single supply amplifier with ground acting "second" "bottom" supply amplifier. output stage also well protected. They possess internal current limit circuits. While device well protected, Safe Operating Area (SOA) curve must observed. Proper heatsinking required maximum reliability. plastic package tied -VS.
COMMAND INPUT 0/10V
BIDIRECTIONAL MOTOR DRIVE
EXTERNAL CONNECTIONS
PA34
amplifier non-inverting gain 2.8. unity gain inverter driven from output Note that inverts signals about reference node, which mid-supply (14V) When command input output 14V. Since this equal reference node voltage, output also 14V, resulting across motor. Inputs more positive than result motor current flow from left right. Inputs less positive than drive motor opposite direction. (See PA21/25/26 Datasheet additional application description.)
EQUIVALENT SCHEMATIC
VBOOST
VBOOST
ISENSE
ISENSE
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
PA34
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, total OUTPUT CURRENT POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common mode JUNCTION TEMPERATURE, max1 TEMPERATURE, solder-10 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
18.5W +VS, -VS-.5V 150°C 300°C -65°C 150°C -55°C 125°C
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, temperature BIAS CURRENT, initial COMMON MODE RANGE COMMON MODE REJECTION, POWER SUPPLY REJECTION GAIN OPEN LOOP GAIN GAIN BANDWIDTH PRODUCT PHASE MARGIN POWER BANDWIDTH OUTPUT CURRENT, peak SLEW RATE CAPACITIVE LOAD DRIVE VOLTAGE SWING VOLTAGE SWING VOLTAGE SWING POWER SUPPLY VOLTAGE, VSS3 CURRENT, quiescent, total THERMAL RESISTANCE, junction case RESISTANCE, junction case RESISTANCE, junction TEMPERATURE RANGE, case Full temp. range, 100mA Full temp. range, 2.5A |VS| -1.0 |VS| -1.8 |VS| -3.0 Full temperature range 40dB Full temperature range VO(P-P) Full temperature range Full temperature range Full temperature range Full temperature range -VS-.3 TEST CONDITIONS
PA34 UNITS
1000
+VS-2
µV/°C
13.6
|VS| -0.8 |VS| -1.4 |VS| -2.8
V/µs
5.44 4.08 Meets full range specifications
°C/W °C/W °C/W
NOTES: Long term operation maximum junction temperature will result reduced product life. Derate internal power dissipation achieve high MTTF. Unless otherwise noted, following conditions apply: ±15V, 25°C. denote positive negative supply rail respectively. denotes total rail-to-rail supply voltage.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
PA34
NORMALIZED BIAS CURRENT,
INTERNAL POWER DISSIPATION, P(W)
POWER DERATING
JUNCTION TEMPERATURE, (°C)
BIAS CURRENT
1.75 1.25 CASE TEMPERATURE, (°C) OUTPUT VOLTAGE, (VPP
POWER RESPONSE
|+VS
FREQUENCY, (Hz)
100K
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, (dB) PHASE, 100K FREQUENCY, (Hz)
PHASE RESPONSE
-120 -150 -180 -210 FREQUENCY, (Hz)
POWER SUPPLY REJECTION, (dB)
VOLTAGE DROP FROM SUPPLY,
POWER SUPPLY REJECTION
100K FREQUENCY, (Hz) OUTPUT VOLTAGE,
PULSE RESPONSE
OUTPUT VOLTAGE SWING
TIME, (µs)
OUTPUT CURRENT,
TOTAL HARMONIC DISTORTION,
16VPP
TOTAL SUPPLY VOLTAGE,
HARMONIC DISTORTION
QUIESCENT CURRENT
CASE TEMPERATURE, (°C)
.001
FREQUENCY, (Hz)
NORMALIZED QUIESCENT CURRENT,
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
PA34
GENERAL
Please read Application Note "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, interpretation, specification interpretation. Visit www.apexmicrotech.com design tools that help automate tasks such calculations stability, internal power dissipation, current limit heat sink selection. "Application Notes" "Technical Seminar" sections contain wealth information specific types applications. Package outlines, heat sinks, mounting hardware other accessories located "Packages Accessories" section. Evaluation Kits available most Apex product models. Consult "Evaluation Kit" section details. most current version Apex product data sheets, visit www.apexmicrotech.com.
OPERATING CONSIDERATIONS
NOTE: protection against sustained, high energy flyback, external fast-recovery diodes should used.
MONOLITHIC AMPLIFIER STABILITY CONSIDERATIONS
monolithic power amps output stage topologies that present special stability problems. This primarily non-complementary (both devices NPN) output stages with mismatch gain phase response different polarities output current. difficult manufacturer optimize compensation operating conditions. recommended network series with 0.1µF from output common (ground supply rail, with adequate bypass capacitors) will prevent local output stage oscillations. amplifiers internally compensated unity gain stability, additional compensation required.
OUTPUT CURRENT FROM
THERMAL CONSIDERATIONS
PA34 require thermal washer which electrically insulating since tied -VS. This result thermal impedances 1°C/W greater.
MOUNTING PRECAUTIONS
Always heat sink. Even unloaded, PA34 dissipate watts. thermal washer thermal grease should always used. Avoid bending leads. Such action lead internal damage. Always fasten heat sink before leads soldered fixed terminals. Strain relief must provided there probability axial stress leads.
SUPPLY OUTPUT DIFFERENTIAL VOLTAGE
SAFE OPERATING AREA (SOA)
curves combine effect limits this power amp. given application, direction magnitude output current should calculated measured checked against curves. This simple resistive loads more complex reactive generating loads. following guidelines save extensive analytical efforts. Under transient conditions, capacitive dynamic* inductive loads following maximum safe: CAPACITIVE LOAD 200µF 500µF 50mF INDUCTIVE LOAD 7.5mH 25mH 35mH 150mH
ADDITIONAL PA34 FUNCTIONS VBOOST
VBOOST positive terminal load second stage amplifier. When that terminal connected voltage greater than will provide more drive upper output transistor, which darlington connected emitter follower. This will better saturate output transistor. When VBOOST about Volts greater than positive output swing Volts closer rail. This much improvement possible. VBOOST requires approximately 10-12mA current. Dynamically represents impedance. maximum voltage that applied VBOOST volts with respect There limit difference between VBOOST. Figure shows bootstrap which dynamically couples output waveform onto VBOOST pin. This causes VBOOST swing positive from it's initial value, which equal -0.7 (one diode drop), amount equal output.
inductive load driven near steady state conditions, allowing output voltage drop more than below supply rail while amplifier current limiting, inductor should capacitively coupled supply voltage must lowered meet criteria.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
OPERATING CONSIDERATIONS
PA34
other words, VBOOST initially 19.3, output swings positive Volts, voltage VBOOST will swing 19.3 -0.7 36.6. capacitor needs sized based impedance lowest frequency required circuit. example, 20Hz will require 8uF.
PA34
Unit
ISENSE
ISENSE series with negative half output stage only. Current will flow through this only when negative current being outputted. current that flows this same current that flows output flows output, ISENSE will have current flow, flows output ISENSE will have current flow). resistor choice arbitrary selected provide whatever voltage drop engineer desires, maximum volt. However, voltage dropped across resistor will subract from swing rail. instance, assume +/-12 volt power supply load that requires +/-1A. With current sense resistor output could swing +/-10.2 volts. resistor used current sense (which will drop Volt Amp) then output could swing +10.2, -9.2 Volts. Figure shows PA34 ISENSE feature being used obtain Transconductance function. this example, amplifier master amplifier slave. Feedback from sensing resistors applied summing network scaled inverting input amplifier where compared input voltage. current sensing feedback imparts Transconductance feature amplifiers transfer function. other words, voltage developed across sensing resistors directly proportional output current. Using this voltage feedback source allows expressing gain circuit amperes input voltage. transfer funcion approximately: (VIN VREF) *RIN/ RFB/ illustration, resistors RIN, determine gain. VBIAS should midway between -Vs, Vref usually ground dual supply systems used level translation single supply systems.
PA34
Unit
SPEAKER
FIGURE SIMPLE BOOTSTRAPPING IMPROVES POSITIVE OUTPUT SWING. TYPICAL CURRENTS 12mA EACH.
VBIAS
VREF
FIGURE ISENSE TRANSCONDUCTANCE BRIDGING AMPLIFIER
This MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS omissions. specifi EMAIL prodlit@apexmicrotech.com APEXdata sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies (520) 690-8601 cations subject change without notice. PA34U REV. 2001 2001 Apex Microtechnology Corp.
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APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
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