鈥?/div>
SONAR TRANSDUCER DRIVER
LINEAR AND ROTARY MOTOR DRIVES
YOKE/MAGNETIC FIELD EXCITATION
PROGRAMMABLE POWER SUPPLIES TO
鹵95V
AUDIO UP TO 400W
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.
R
f
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鈩?package (see
Package Outlines) is hermetically sealed and isolated from the
internal circuits. The use of compressible thermal washers will
void product warranty.
CONTROL
LOGIC
ULTRA-
SONIC
DRIVE
R
i
1
2
12
PA04
11
10
7
R
CL
TUNED
TRANSFORMER
Sonar Transducer Driver
EXTERNAL CONNECTIONS
EQUIVALENT SCHEMATIC
SLEEP
12
9
+V
BOOST
Q10
D1
Q5
D2
D3
Q12
D5
鈥揑N
1
D6
+IN
2
Q17
Q19
D7
COMP D8
3
Q21
Q22
4
鈥揤
BOOST
5
COMP
Q20
鈥揤s 6
Q26
Q18
D9
10
I
LIM
7
OUT
Q7
D4
Q13
Q6
I
LIM
11
+Vs 8
-INPUT
+INPUT
COMP
R
C
C C
COMP
-V
BOOST
1
2
3
4
5
6
TOP
VIEW
12
11
10
9
8
7
SLEEP
CURRENT LIMIT
CURRENT LIMIT
+V
BOOST
*
+SUPPLY
OUTPUT
*
-SUPPLY
Q14 Q15
PHASE COMPENSATION
Gain
1
>3
鈮?0
C
C
470pF
220pF
100pF
R
C
120鈩?/div>
120鈩?/div>
120鈩?/div>
C
C
RATED FOR FULL SUPPLY VOLTAGE
*See 鈥淏OOST OPERATION鈥?paragraph.
APEX MICROTECHNOLOGY CORPORATION
鈥?TELEPHONE (520) 690-8600 鈥?FAX (520) 888-3329 鈥?ORDERS (520) 690-8601 鈥?EMAIL prodlit@apexmicrotech.com
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