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| 型號： | PA33A |
| 英文描述： | Operational Amplifier |
| 中文描述： | 運(yùn)算放大器 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 57K |
| 代理商： | PA33A |
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
FEATURES
HIGH INTERNAL DISSIPATION — 250 WATTS
HIGH VOLTAGE, HIGH CURRENT — 100V, 30A
HIGH SLEW RATE — 100V/S
4 WIRE CURRENT LIMIT SENSING
LOW DISTORTION
EXTERNAL SHUTDOWN CONTROL
OPTIONAL BOOST VOLTAGE INPUTS
EVALUATION KIT — SEE EK04
APPLICATIONS
LINEAR AND ROTARY MOTOR DRIVES
SONAR TRANSDUCER DRIVER
YOKE/MAGNETIC FIELD EXCITATION
PROGRAMMABLE POWER SUPPLIES TO ±45V
AUDIO UP TO 500W
DESCRIPTION
The PA33 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 PA33 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 perfor-
mance 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
12
9
5
6
8
10
SHUTDOWN
+V
BOOST
–IN
–V
BOOST
+IN
+Vs
I
LIM
I
LIM
OUT
–Vs
BIAS
7
4
3
COMP
2
1
11
Q12
Q13
Q1
Q8
Q4
Q5
Q10
Q16
Q17
Q22
Q14
Q18
Q24
Q21
Q25
Q29
Q30
Q33
D1
D6
D9
D5
D19
D20
D27
D31
D4
CONTROL
LOGIC
ULTRA-
SONIC
DRIVE
R f
R i
1
12
2
10
11
R CL
TUNED
TRANSFORMER
PA33
7
TYPICAL APPLICATION
The high power bandwidth of the PA33 allows driving sonar
transducers via a resonant circuit including the transducer and
a matching transformer. The load circuit appears resistive to
the PA33. Control logic turns off the amplifier's output during
shutdown.
EXTERNAL CONNECTIONS
PHASE COMPENSATION
Gain
C
R
C
1
470pF
120
>3
220pF
120
≥10
82pF
120
C
C RATED FOR FULL SUPPLY VOLTAGE
*See
BOOST OPERATION paragraph.
The DIP04 12-pin package (see Package Outlines) is
hermetically sealed and isolated from the internal circuits. The
use of compressible thermal washers and/or improper mount-
ing torque will void the product warranty. Please see “General
Operating Considerations”.
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
MICROTECHNOLOGY
POWER OPERATIONAL AMPLIFIERS
PA33 PA33A
TOP
VIEW
–INPUT
+INPUT
SHUTDOWN
CURRENT LIMIT
CC
R C
1
2
3
4
5
6
12
11
10
9
8
7
TOP
VIEW
COMP
–VBOOST
–SUPPLY
+VBOOST
+SUPPLY
OUTPUT
*
COMP
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