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PA21 Dataheets PDF



Part Number PA21
Manufacturers ETC
Logo ETC
Description POWER DUAL OPERATIONAL AMPLIFIERS
Datasheet PA21 DatasheetPA21 Datasheet (PDF)

POWER DUAL OPERATIONAL AMPLIFIERS PA21/25/26 • PA21A/25A M I C R O T E C H N O L O G Y HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 FEATURES • LOW COST • WIDE COMMON MODE RANGE — Includes negative supply • WIDE SUPPLY VOLTAGE RANGE Single supply: 5V to 40V Split supplies: ±2.5V to ±20V • HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ • HIGH OUTPUT CURRENT — 3A min (PA21A) • INTERNAL CURRENT LIMIT • LOW DISTORTION R2 9K +28V R1 5K + 1/2 PA21 COMMAND INPUT 0/10V – A M R3 10K R4 10K –.

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POWER DUAL OPERATIONAL AMPLIFIERS PA21/25/26 • PA21A/25A M I C R O T E C H N O L O G Y HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 FEATURES • LOW COST • WIDE COMMON MODE RANGE — Includes negative supply • WIDE SUPPLY VOLTAGE RANGE Single supply: 5V to 40V Split supplies: ±2.5V to ±20V • HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ • HIGH OUTPUT CURRENT — 3A min (PA21A) • INTERNAL CURRENT LIMIT • LOW DISTORTION R2 9K +28V R1 5K + 1/2 PA21 COMMAND INPUT 0/10V – A M R3 10K R4 10K – B + 1/2 PA21 R5 10K +28V APPLICATIONS • HALF & FULL BRIDGE MOTOR DRIVERS • AUDIO POWER AMPLIFIER STEREO — 18W RMS per channel BRIDGE — 36W RMS per package • IDEAL FOR SINGLE SUPPLY SYSTEMS 5V — Peripherals 12V — Automotive 28V — Avionic R6 10K FIGURE 1: BIDIRECTIONAL SPEED CONTROL FROM A SINGLE SUPPLY The amplifiers are especially well-suited for this application. The extended common mode range allows command inputs as low as 0V. Its superior output swing abilities let it drive within 2V of supply at an output current of 2A. This means that a command input that ranges from 0V to 10V will drive a 24V motor from full scale CCW to full scale CW at up to ±2A. A single power op amp with an output swing capability of Vs –6 would require ± 30V supplies and would be required to swing 48V p-p at twice the speed to deliver an equivalent drive. DESCRIPTION The amplifiers consist of a monolithic dual power op amp in a 8-pin hermetic TO-3 package (PA21 and PA25) and a 12pin SIP package (PA26). Putting two power op amps in one package and on one die results in an extremely cost effective solution for applications requiring multiple amplifiers per board or bridge mode configurations. The wide common mode input range includes the negative rail, facilitating single supply applications. It is possible to have a “ground based” input driving a single supply amplifier with ground acting as the “second” or “bottom” supply of the amplifier. The output stages are also well protected. They possess internal current limit circuits. While the device is well protected, the Safe Operating Area (SOA) curve must be observed. Proper heatsinking is required for maximum reliability. This hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible isolation washers voids the warranty. The tab of the SIP12 plastic package is tied to –VS. EXTERNAL CONNECTIONS PA26 Connect pins 3 and 10 to pin 7 and connect pins 4 and 9 to pin 6 unless special functions are required. 1 2 + A – B SUB + – 3 4 5 6 7 8 9 10 11 12 +IN A –IN A –IN B +VS 2 OUT A ISENSE/–VS OUT B VBOOST/+VS ISENSE/–VS TYPICAL APPLICATION R1 and R2 set up amplifier A in a non-inverting gain of 2.8. Amp.


PA2010 PA21 PA21A


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