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PP rAo d1u3c ,t PI nAn o1v3aAt i o n F r o m
PA13 • PA13APA1ww3w.DaPtaASh1ee3t4AU.com
Power Operational Amplifier
FEATURES
♦ LOW THERMAL RESISTANCE — 1.1°C/W
♦ CURRENT FOLDOVER PROTECTION
♦ EXCELLENT LINEARITY — Class A/B Output
♦ WIDE SUPPLY RANGE — ±10V to ±45V
♦ HIGH OUTPUT CURRENT — Up to ±15A Peak
APPLICATIONS
♦ MOTOR, VALVE AND ACTUATOR CONTROL
♦ MAGNETIC DEFLECTION CIRCUITS
UP TO 10A
♦ POWER TRANSDUCERS UP TO 100kHz
♦ TEMPERATURE CONTROL UP TO 360W
♦ PROGRAMMABLE POWER SUPPLIES
UP TO 90V
♦ AUDIO AMPLIFIERS UP TO 120W RMS
DESCRIPTION
The PA13 is a state of the art high voltage, very high
output current operational amplifier designed to drive
resistive, inductive and capacitive loads. For optimum
linearity, especially at low levels, the output stage is
biased for class A/B operation using a thermistor com-
pensated base-emitter voltage multiplier circuit. The
safe operating area (SOA) can be observed for all op-
erating conditions by selection of user programmable
current limiting resistors. For continuous operation un-
der load, a heatsink of proper rating is recommended.
The PA13 is not recommended for gains below –3 (in-
verting) or +4 (non-inverting).
This hybrid integrated circuit utilizes thick film (cermet)
resistors, ceramic capacitors and semiconductor chips
to maximize reliability, minimize size and give top per-
formance. Ultrasonically bonded aluminum wires pro-
vide reliable interconnections at all operating temper-
atures. The 12-pin power SIP package is electrically
isolated.
EQUIVALENT SCHEMATIC
12
11
D1
Q2A
Q2B
10
Q1 9
Q3
2
A1
1
C1
5
6
Q4 Q5
Q6B
Q6A
3
4
7
8
EXTERNAL CONNECTIONS
12
–IN +IN
34 56 78
F.O.
–RCL
–VS –CL
+RCL
OUTPUT
9 10 11 12
+CL
+VS
12-pin SIP
PACKAGE
STYLE DP
Formed leads avaliable
See package style EE
PA13wUww.cirrus.com
Copyright © Cirrus Logic, Inc. 2010
(All Rights Reserved)
APEX − PMAA13RR2E0V1Q01

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PA13 • PA13A
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1. CHARACTERISTICS AND SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS – PA13/PA13A
Parameter
SUPPLY VOLTAGE, +VS to -VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder, 10s max.
TEMPERATURE, junction
(Note 3)
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
Symbol
Min
-37
-VS
−40
−25
Max
100
15
135
37
VS
260
175
85
85
Units
V
A
W
V
V
°C
°C
°C
°C
CAUTION The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures
in excess of 850°C to avoid generating toxic fumes.
SPECIFICATIONS
Parameter
Test Condi-
tions2,5
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE vs. temp
Full temp range
OFFSET VOLTAGE vs. supply
OFFSET VOLTAGE vs. power
BIAS CURRENT, initial
BIAS CURRENT, vs. temp
Full temp range
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
OFFSET CURRENT, vs. temp Full temp range
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE
RANGE
(Note 4)
Full temp range
COMMON MODE REJECTION, Full temp range,
DC VCM = ±VS – 6V
GAIN
OPEN LOOP GAIN @ 10Hz 1KΩ load
OPEN LOOP GAIN @ 10Hz
Full temp range,
8Ω load
GAIN BANDWIDTH PRODUCT 8Ω load
@ 1MHz
POWER BANDWIDTH
8Ω load
PHASE MARGIN, A V = +4
Full temp range,
8Ω load
Min
±VS - 5
74
96
13
PA13
Typ
±2
±10
±30
±20
±12
±50
±10
±12
±50
200
3
±VS - 3
100
110
108
4
20
20
Max
±6
±65
±200
±30
±500
±30
PA13A
Min Typ Max
Units
±1 ±4 mV
* ±40 µV/°C
* * µV/V
* µV/W
±10 ±20
nA
* * pA/°C
* pA/V
±5 ±10
nA
* pA/°C
* MΩ
* pF
**
V
**
dB
*
**
*
**
*
dB
dB
MHz
kHz
°
2 PA13U

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Parameter
OUTPUT
VOLTAGE SWING (Note 4)
VOLTAGE SWING (Note 4)
VOLTAGE SWING (Note 4)
CURRENT, peak
SETTLING TIME to 0.1%
SLEW RATE
CAPACITIVE LOAD
CAPACITIVE LOAD
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
THERMAL
RESISTANCE, AC,
junction to case (Note 5)
RESISTANCE, DC,
junction to case
RESISTANCE, DC,
junction to air
TEMPERATURE RANGE, case
Test Condi-
tions2,5
PA13 = 10A,
PA13A = 15A
IO = 5A
Full temp range,
IO = 80mA
2V step
Full temp range,
AV = 4
Full temp range,
A V > 10
Full temp range
TC = –55 to
+125°C, F >
60Hz
TC = –55 to
+125°C
TC = –55 to
+125°C
Meets full range
specification
Min
±VS - 6
±VS - 5
±VS - 5
10
2.5
±10
-25
PA13
Typ
2
4
±40
25
0.6
0.9
30
Max
1.5
SOA
±45
50
0.7
1.1
+85
PA13A
Min Typ Max
Units
*
*
*
15
*
**
V
V
V
A
µS
V/µS
* nF
*
** * V
* * mA
* * °C/W
* * °C/W
* °C/W
* * °C
NOTES: 1. (All Min/Max characteristics and specifications are guaranteed over the Specified Operating Condi-
tions. Typical performance characteristics and specifications are derived from measurements taken at
typical supply voltages and TC = 25°C).
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate
power dissipation to achieve high MTTF.
* The specification of PA13A is identical to the specification for PA13 in the applicable column to the left
3. The power supply voltage for all tests is ±40, unless otherwise noted as a test condition.
4. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS
to –VS.
5. Rating applies if the output current alternates between both output transistors at a rate faster than
60Hz.
6. Full temperature range specifications are guaranteed but not 100% tested.
PA13U
3

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POWER RATING
TYPICAL APPLICATION
Not all vendors use the same method to rate the power han-
+73V
dling capability of a Power Op Amp. Apex Precision Power
rates the internal dissipation, which is consistent with rating
methods used by transistor manufacturers and gives conser-
vative results. Rating delivered power is highly application
dependent and therefore can be misleading. For example,
the 135W internal dissipation rating of the PA13 could be ex-
pressed as an output rating of 260W for audio (sine wave) or
as 440W if using a single ended DC load. Please note that all
vendors rate maximum power using an infinite heatsink.
THERMAL STABILITY
Apex Precision Power has eliminated the tendency of class
A/B output stages toward thermal runaway and thus has
vastly increased amplifier reliability. This feature, not found in
most other Power Op Amps, was pioneered by Apex Preci-
sion Power in 1981 using thermistors which assure a negative
temperature coefficient in the quiescent current. The reliability
47µF
2.5VP-P
11,12
RCL+
2 9,10 .2Ω
1 PA13
7,8
5,6
3
RCL–
.2Ω
47µF
.1µF
–22V
YOKE DRIVER: –V =
L* 1
t
HIGH CURRENT ASYMMETRICAL SUPPLY
.1µF
RD
2K
CF
50pF
RF
1K
benefits of this added circuitry far outweigh the slight increase
in component count.
7.8mH
5Ap-p
RS
.5Ω
TYPICAL PERFORMANCE GRAPHS
POWER DERATING
140
BIAS CURRENT
2.5
120 2.2
100 1.9
80 1.6
60
PA13
40
1.3
1.0
20
0
0 20 40 60 80 100 120 140
CASE TEMPERATURE, TC (°C)
SMALL SIGNAL RESPONSE
120
.7
.4
–50 –25 0 25 50 75 100 125
CASE TEMPERATURE, TC (°C)
PHASE RESPONSE
0
100 –30
80 –60
60 –90
40 –120
20 –150
0
–20
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
–180
–210
1
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
CURRENT LIMIT
17.5
15.0
12.5
RCL = .06Ω, RFO =
10.0
7.5
RCL = .18Ω, RFO = 0
V
O
=
0
5.0
2.5
V
O
=
–24V
V
O
=
24V
V
O
=
0
0
–50 –25 0 25 50 75 100 125
CASE TEMPERATURE, TC (°C)
POWER RESPONSE
100
68 | +VS | + | –VS | = 100V
46
32
22 | +VS | – | –VS | = 80V
15 | +VS | + | –VS | = 30V
10
6.8
4.6
10K
20K 30K 50K 70K .1M
FREQUENCY, F (Hz)
COMMON MODE REJECTION
120
100
4 80
60
PULSE RESPONSE
8
6 VIN = 5V, tr = 100ns
4
2
0
INPUT NOISE
100
70
50 PA13U
40
30

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60 –90
40 –120
20 –150
0
–20
1
® P r o d u c t I n n o v a t i o n F r o1m80
–210
10 100 1K 10K .1M 1M 10M
1
FREQUENCY, F (Hz)
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
32
22 | +VS | – | –VS | = 80V
15 | +VS | + | –VS | = 30V
10
6.8
4.6
10K
PA1ww3w.DaPtaASh1ee3t4AU.com
20K 30K 50K 70K .1M
FREQUENCY, F (Hz)
COMMON MODE REJECTION
120
100
80
60
40
20
0
1 10 100 1K 10K .1M 1M
FREQUENCY, F (Hz)
HARMONIC DISTORTION
3
1
VRAVSL
=10
= 37V
= 4Ω
.3
.1 = 100mW
.03 P O
P O= 4W
.01
.003
100
= 120W
PO
300 1K 3K 10K 30K
FREQUENCY, F (Hz)
.1M
PULSE RESPONSE
8
6 VIN = 5V, tr = 100ns
4
2
0
-2
-4
-6
-8
0 2 4 6 8 10 12
TIME, t (µs)
QUIESCENT CURRENT
1.6
1.4
1.2 TC = –25°C
1.0 TC = 25°C
TC = 85°C
.8 TC = 125°C
.6
.4
40 50 60 70 80 90 100
TOTAL SUPPLY VOLTAGE, VS (V)
INPUT NOISE
100
70
50
40
30
20
10
10
100 1K 10K
FREQUENCY, F (Hz)
.1M
OUTPUT VOLTAGE SWING
6
5
4 –VO
3
+VO
2
1
0 3 6 9 12 15
OUTPUT CURRENT, IO (A)
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification interpretation. Visit www.Cirrus.com for design tools
that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selec-
tion; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
SAFE OPERATING AREA (SOA)
The output stage of most power amplifiers has three distinct
limitations:
1. The current handling capability of the transistor geometry
and the wire bonds.
2. The second breakdown effect which occurs whenever the
simultaneous collector current and collector-emitter volt-
age exceeds specified limits.
3. The junction temperature of the output transistors.
The SOA curves combine the effect of all limits for this Power
Op Amp. For a given application, the direction and magnitude
of the output current should be calculated or measured and
checked against the SOA curves. This is simple for resistive
loads but more complex for reactive and EMF generating
loads. However, the following guidelines may save extensive
analytical efforts.
15 SOA
10
6.0
4.0
3.0
2.0
THERMAL
TCTC==8255°C°C
1.0
.6
.410 20 30 40 50 70 90
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, VS - VO (V)
PA13U
5