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

1

The JEDEC MO-127 12-pin Power Dip™ package (see

Package Outlines) is hermetically sealed and isolated from

the internal circuits. The use of compressible thermal washers

and/or improper mounting torque will void the product warranty.

Please see “General Operating Considerations”.

TYPICAL APPLICATION

The high power bandwidth of the PA05 allows driving sonar

transducers via a resonant circuit including the transducer

and a matching transformer. The load circuit appears resis-

tive to the PA05. Control logic turns off the amplifier's output

during shutdown.

EXTERNAL CONNECTIONS

PHASE COMPENSATION

Gain

C

C

R

C

1

470pF

120Ω

>3

220pF

120Ω

≥10

82pF

120Ω

C

*See BOOST OPERATION paragraph.

FEATURES

• HIGH INTERNAL DISSIPATION — 250 WATTS

• HIGH VOLTAGE, HIGH CURRENT — 100V, 30A

• HIGH SLEW RATE — 100V/µS

• 4 WIRE CURRENT LIMIT SENSING

• LOW DISTORTION

• EXTERNAL SHUTDOWN CONTROL

• OPTIONAL BOOST VOLTAGE INPUTS

• EVALUATION KIT — SEE EK09

APPLICATIONS

• LINEAR AND ROTARY MOTOR DRIVES

• sonar transducer driver

• YOKE/MAGNETIC FIELD EXCITATION

• PROGRAMMABLE POWER SUPPLIES TO ±45V

• AUDIO UP TO 500W

DESCRIPTION

The PA05 is a high voltage MOSFET power operational

amplifier that extends the performance limits of power ampli-

fiers in slew rate and power bandwidth, while maintaining high

current and power dissipation ratings.

The PA05 is a highly flexible amplifier. The shutdown control

feature allows the output stage to be turned off for standby

operation or load protection during fault conditions. Boost

voltage inputs allow the small signal portion of the amplifier to

operate at a higher voltage than the high current output stage.

The amplifier is then biased to achieve close linear swings to

the supply rails at high currents for extra efficient operation.

External compensation tailors slew rate and bandwidth per-

formance to user needs. A four wire sense technique allows

precision current limiting without the need to consider internal

or external milliohm parasitic resistance in the output line. The

output stage is protected by thermal limiting circuits above

junction temperatures of 175°C.

EQUIVALENT SCHEMATIC

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12-PIN POWER DIP

PACKAGE STYLE CR