PA10_09 Datasheet, PDF (1/5 Pages) Cirrus Logic – Power Operational Amplifier

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PA10PA•1P0 A• P1A01A0A
Power Operational Amplifier
FEATURES
• Gain bandwidth product — 4MHz
• Temperature range — –55 to +125°C (PA10A)
• Excellent linearity — Class A/B Output
• Wide supply range — ±10V to ±50V
• High output current — ±5A Peak
APPLICATIONS
• Motor, valve and actuator control
• Magnetic deflection circuits up to 4A
• Power transducers up to 100kHz
• Temperature control up to 180W
• Programmable power supplies up to 90V
• Audio amplifiers up to 60W RMS
DESCRIPTION
The PA10 and PA10A are high voltage, high output current
operational amplifiers designed to drive resistive, inductive
and capacitive loads. For optimum linearity, the output stage
is biased for class A/B operation. The safe operating area
(SOA) can be observed for all operating conditions by selec-
tion of user programmable current limiting resistors. Both
amplifiers are internally compensated for all gain settings. For
continuous operation under load, a heatsink of proper rating
is recommended.
This hybrid integrated circuit utilizes thick film (cermet)
resistors, ceramic capacitors and semiconductor chips to
maximize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable inter-
connections at all operating temperatures. The 8-pin TO-3
package is hermetically sealed and electrically isolated. The
use of compressible isolation washers voids the warranty.
EQUIVALENT SCHEMATIC
3
D1
Q1
Q2A
Q2B
2
Q3
4
A1
5
C1
6
Q4
1
Q5
7
8
Q6B
Q6A
TYPICAL APPLICATION
R2A
+42V
R1A
.82Ω
PA10
CONTROL
R1B
–42V
.82Ω
8-pin TO-3
PACKAGE STYLE CE
RS
LOAD
R2B
0-24Ω
FIGURE 1. VOLTAGE-TO-CURRENT CONVERSION
DC and low distortion AC current waveforms are delivered
to a grounded load by using matched resistors (A and B
sections) and taking advantage of the high common mode
rejection of the PA10.
Foldover current limit is used to modify current limits based
on output voltage. When load resistance drops to 0, the current
is limited based on output voltage. When load resistance drops
to 0, the current limit is 0.79A resulting in an internal dissipa-
tion of 33.3 W. When output voltage increases to 36V, the
current limit is 1.69A. Refer to Application Note 9 on foldover
limiting for details.
EXTERNAL CONNECTIONS
+V_S
3
CL+
2
OUT
1
+IN ₄
TOP VIEW
R _CL+
–IN 5
6
–V_S
7
FO
8
CL–
R _CL–
OUTPUT
PA10_hU_{ttp://www.cirrus.com}
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009₁
APEX − PA10UREVR