PA26 ETC ETC, PA26 Datasheet

PA26

Manufacturer Part Number

PA26

Description

PA26POWER DUAL OPERATIONAL AMPLIFIERS

Manufacturer

ETC ETC

Datasheet

1.PA26.pdf (5 pages)

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FEATURES

• LOW COST

• WIDE COMMON MODE RANGE —

• WIDE SUPPLY VOLTAGE RANGE

• HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ

• HIGH OUTPUT CURRENT — 3A min (PA21A)

• INTERNAL CURRENT LIMIT

• LOW DISTORTION

APPLICATIONS

• HALF & FULL BRIDGE MOTOR DRIVERS

• AUDIO POWER AMPLIFIER

• IDEAL FOR SINGLE SUPPLY SYSTEMS

DESCRIPTION

in a 8-pin hermetic TO-3 package (PA21 and PA25) and a 12-

pin 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.

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.

internal current limit circuits. While the device is well pro-

tected, the Safe Operating Area (SOA) curve must be ob-

served. Proper heatsinking is required for maximum reliabil-

ity.

resistors, ceramic capacitors and semiconductor chips to

maximize reliability, minimize size and give top performance.

Ultrasonically bonded aluminum wires provide reliable inter-

connections 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 –V

TYPICAL APPLICATION

Amp B is set up as a unity gain inverter driven from the output

of amp A. Note that amp B inverts signals about the reference

node, which is set at mid-supply (14V) by R5 and R6. When the

command input is 5V, the output of amp A is 14V. Since this is

equal to the reference node voltage, the output of amp B is also

14V, resulting in 0V across the motor. Inputs more positive

than 5V result in motor current flow from left to right (see Figure

1). Inputs less positive than 5V drive the motor in the opposite

direction.

M I C R O T E C H N O L O G Y

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

The amplifiers consist of a monolithic dual power op amp

The wide common mode input range includes the negative

The output stages are also well protected. They possess

This hybrid integrated circuit utilizes thick film (cermet)

R1 and R2 set up amplifier A in a non-inverting gain of 2.8.

Includes negative supply

Single supply: 5V to 40V

Split supplies: 2.5V to 20V

STEREO — 18W RMS per channel

BRIDGE — 36W RMS per package

5V — Peripherals

12V — Automotive

28V — Avionic

H T T P : / / W W W . A P E X M I C R O T E C H . C O M

PA21/25/26 • PA21A/25A

POWER DUAL OPERATIONAL AMPLIFIERS

FIGURE 1: BIDIRECTIONAL SPEED CONTROL FROM

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.

EXTERNAL CONNECTIONS

PA26

3 and 10 to pin 7

and connect pins

4 and 9 to pin 6

unless special

functions are re-

quired.

PA25

OUT, A

–IN, A

The amplifiers are especially well-suited for this application.

Connect pins

+IN, A

COMMAND

–V

INPUT

0/10V

TOP VIEW

( 8 0 0 ) 5 4 6 - A P E X

– +

A SINGLE SUPPLY

+IN, B

–

+28V

1/2 PA21

–

OUT, B

–IN, B

–

( 8 0 0 ) 5 4 6 - 2 7 3 9

PA21

+IN, A

1/2 PA21

+IN, B

SUB

–IN, A

–IN, B

10K

–

–V

10K

+28V

OUT, A

OUT, B

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PA26 Summary of contents

Page 1

... The amplifiers consist of a monolithic dual power op amp in a 8-pin hermetic TO-3 package (PA21 and PA25) and a 12- pin 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 ...

Page 2

... The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or CAUTION subject to temperatures in excess of 850 C to avoid generating toxic fumes. (PA21 and PA25 only. PA26 does not contain BeO). APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 ...

Page 3

TYPICAL PERFORMANCE GRAPHS POWER DERATING BOTH 25 AMPLIFIERS 20 15 SINGLE AMPLIFIER 100 125 TEMPERATURE, T (°C) SMALL SIGNAL RESPONSE 100 – 100 ...

Page 4

... F from output to AC common (ground or a supply rail, with adequate bypass capacitors) will prevent local output stage oscillations. This network is provided internally on the PA21 but must be supplied externally on the PA25 and PA26. The amplifiers are internally compensated for unity gain stability, no additional compensation is required. THERMAL CONSIDERATIONS ...

Page 5

... MOUNTING PRECAUTIONS 1. Always use a heat sink. Even unloaded, the PA26 can dissipate up to 3.6 watts. A thermal washer or thermal grease should always be used. 2. Avoid bending the leads. Such action can lead to internal damage ...

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