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PA04

USA

BeO

∆

TE949311

12

9

1

5

6

8

10

11

7

2

4

3

SLEEP

Q10

–IN

Q14 Q15

Q21

COMP

Q22

+IN

Q20

COMP

Q17

D1

Q5

Q12

Q19

Q26

Q18

Q13

+Vs

Q6

OUT

Q7

–Vs

D5

D6

D2

D3

D7

D9

D8

D4

TYPICAL APPLICATION

The high power bandwidth and high voltage output of the

PA04 allows driving sonar transducers via a resonant circuit

including the transducer and a matching transformer. The load

circuit appears resistive to the PA04. Control logic turns off the

amplifier in sleep mode.

Sonar Transducer Driver

EXTERNAL CONNECTIONS

PHASE COMPENSATION

Gain

C

C

R

C

1

470pF

120

Ω

>3

220pF

120

Ω

≥10

100pF

120

Ω

C

*See “BOOST OPERATION” paragraph.

CONTROL

LOGIC

ULTRA-

SONIC

DRIVE

1

12

2

7

10

11

TUNED

TRANSFORMER

PA04

TOP

VIEW

-INPUT

+INPUT

SLEEP

CURRENT LIMIT

CURRENT LIMIT

1

2

3

4

5

6

12

11

10

9

8

7

TOP

VIEW

COMP

-SUPPLY

+SUPPLY

OUTPUT

*

*

COMP

FEATURES

• HIGH INTERNAL DISSIPATION — 200 WATTS

• HIGH VOLTAGE, HIGH CURRENT — 200V, 20A

• HIGH SLEW RATE — 50V/

µS

• 4 WIRE CURRENT LIMIT SENSING

• LOW DISTORTION

• EXTERNAL SLEEP MODE CONTROL

• OPTIONAL BOOST VOLTAGE INPUTS

• EVALUATION KIT — SEE EK04

APPLICATIONS

• SONAR TRANSDUCER DRIVER

• LINEAR AND ROTARY MOTOR DRIVES

• YOKE/MAGNETIC FIELD EXCITATION

• PROGRAMMABLE POWER SUPPLIES TO

±95V

• AUDIO UP TO 400W

DESCRIPTION

The PA04 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 PA04 is a highly flexible amplifier. The sleep mode

feature allows ultra-low quiescent current for standby opera-

tion or load protection by disabling the entire amplifier. 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 performance 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 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 will

void product warranty.

EQUIVALENT SCHEMATIC

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(800) 546-APEX

(800) 546-2739

MICROTECHNOLOGY

POWER OPERATIONAL AMPLIFIERS

PA04 • PA04A