PA51(2000) Просмотр технического описания (PDF) - Apex Microtechnology
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PA51 Datasheet PDF : 4 Pages
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MICROTECHNOLOGY
POWER OPERATIONAL AMPLIFIERS
PA51 • PA51A
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• WIDE SUPPLY RANGE — ±10 to ±40V
• HIGH OUTPUT CURRENT — ±10A Peak
• SECOND SOURCEABLE — OPA501, 8785
• CLASS “C” OUTPUT — Low Cost
• LOW QUIESCENT CURRENT — 2.6mA
APPLICATIONS
• DC SERVO AMPLIFIER
• MOTOR/SYNCHRO DRIVER
• VALVE AND ACTUATOR CONTROL
• DC OR AC POWER REGULATOR
DESCRIPTION
The PA51 and PA51A are high voltage, high output current
operational amplifiers designed to drive resistive, inductive
and capacitive loads. Their complementary common emitter
output stage is the simple class C type optimized for low
frequency applications where crossover distortion is not criti-
cal. These amplifiers are not recommended for audio, trans-
ducer or deflection coil drive circuits. The safe operating area
(SOA) is fully specified and can be observed for all operating
conditions by selection of user programmable current limiting
resistors. Both amplifiers are internally compensated for all
gain settings. For continuous operation under load, mounting
on a heatsink of proper rating is recommended. Do not use
isolation washers!
This hybrid integrated circuit utilizes thick film conductors,
ceramic capacitors and semiconductor chips to maximize
reliability, minimize size and give top performance. Ultrasoni-
cally bonded aluminum wires provide reliable interconnec-
tions at all operating temperatures. The 8-pin TO-3 package is
electrically isolated and hermetically sealed. The use of com-
pressible thermal washers and/or improper mounting torque
will void the product warranty. Please see “General Operating
Considerations”.
EQUIVALENT SCHEMATIC
3
4
A1
5
C1
6
Q1A
Q1B
2
Q3
1
Q4
8
Q6A
Q6B
TYPICAL APPLICATION
C1
0/+5V
DAC
R1
4.16K
R2
2.5K
+10V
R3
.1 Ω
PA51
–28V
R4
.1 Ω
0/6A
M
MOTOR CURRENT IS A FUNCTION OF VIN
PROGRAMMABLE TORQUE CIRCUIT
R5
.5 Ω
The linear relationship of torque output to current input of the
modern torque motor makes this simple control circuit ideal for
many material processing and testing applications. The sense
resistor develops a feedback voltage proportional to motor
current and the small signal properties of the Power Op Amp
insure accuracy. With this closed loop operation, temperature
induced impedance variations of the motor winding are auto-
matically compensated.
EXTERNAL CONNECTIONS
+VS
3
CL+
2
OUT
1
+IN 4
TOP VIEW
R CL+
–IN 5
6
–VS
7
N.C.
8
CL–
R CL–
OUTPUT
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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