CIRRUS PA13_09

Product Innovation
PA13,
PA13A
PA13PA13
• PA13A
• PA13A
From
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 compensated base-emitter voltage multiplier circuit. The
safe operating area (SOA) can be observed for all operating conditions by selection of user programmable
current limiting resistors. For continuous operation under load, a heatsink of proper rating is recommended.
The PA13 is not recommended for gains below –3 (inverting) 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 performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 12-pin power SIP package is electrically
isolated.
EQUIVALENT SCHEMATIC
12
11
Q2A
D1
Q2B
Q1
10
9
Q3
Q4
3
4
Q5
7
8
2
Q6A
A1
Q6B
1
C1
5
6
EXTERNAL CONNECTIONS
1
2
3
4
5
6
7
8
9
10
11
12
F.O.
–R CL
–IN
+IN
+R CL
–VS
–CL
+CL
+VS
OUTPUT
PA13U
www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
12-pin SIP
PACKAGE
STYLE DP
Formed leads avaliable
See package style EE
AUG 20091
APEX − PA13REVO
PA13 • PA13A
Product Innovation From
1. CHARACTERISTICS AND SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS – PA13/PA13A
Parameter
Symbol
Min
Max
Units
SUPPLY VOLTAGE, +VS to -VS
100
V
OUTPUT CURRENT, within SOA
15
A
POWER DISSIPATION, internal
135
W
INPUT VOLTAGE, differential
-37
37
V
INPUT VOLTAGE, common mode
-VS
VS
V
TEMPERATURE, pin solder, 10s max.
260
°C
TEMPERATURE, junction (Note 3)
175
°C
TEMPERATURE RANGE, storage
−40
85
°C
OPERATING TEMPERATURE RANGE, case
−25
85
°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 Conditions2,5
PA13
Min
Typ
PA13A
Max
Min
Typ
Max
Units
INPUT
OFFSET VOLTAGE, initial
±2
±6
±1
±4
mV
±10
±65
*
±40
µV/°C
OFFSET VOLTAGE vs. supply
±30
±200
*
*
OFFSET VOLTAGE vs. power
±20
BIAS CURRENT, initial
±12
±30
±10
±20
nA
±50
±500
*
*
pA/°C
OFFSET VOLTAGE vs. temp
BIAS CURRENT, vs. temp
Full temp range
Full temp range
BIAS CURRENT, vs. supply
±10
OFFSET CURRENT, initial
±12
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
*
*
±30
±5
µV/V
µV/W
pA/V
±10
nA
±50
*
pA/°C
200
*
MΩ
3
*
pF
±VS - 5
±VS - 3
*
*
V
74
100
*
*
dB
*
dB
96
108
*
dB
*
MHz
*
kHz
*
°
GAIN
OPEN LOOP GAIN @ 10Hz
1KΩ load
OPEN LOOP GAIN @ 10Hz
Full temp range,
8Ω load
110
GAIN BANDWIDTH PRODUCT 8Ω load
@ 1MHz
POWER BANDWIDTH
8Ω load
PHASE MARGIN, A V = +4
Full temp range,
8Ω load
2
*
4
13
20
20
*
PA13U
PA13 • PA13A
Product Innovation From
Parameter
Test Conditions2,5
PA13
Min
Typ
PA13A
Max
Min
Typ
Max
Units
OUTPUT
VOLTAGE SWING (Note 4)
PA13 = 10A,
PA13A = 15A
±VS - 6
*
V
VOLTAGE SWING (Note 4)
IO = 5A
±VS - 5
*
V
VOLTAGE SWING (Note 4)
Full temp range,
IO = 80mA
±VS - 5
*
V
CURRENT, peak
SETTLING TIME to 0.1%
10
2V step
SLEW RATE
15
2
2.5
4
*
A
*
µS
*
V/µS
CAPACITIVE LOAD
Full temp range,
AV = 4
1.5
*
CAPACITIVE LOAD
Full temp range,
A V > 10
SOA
*
nF
POWER SUPPLY
VOLTAGE
Full temp range
±10
CURRENT, quiescent
±40
±45
25
*
*
*
V
50
*
*
mA
THERMAL
RESISTANCE, AC,
junction to case (Note 5)
TC = –55 to
+125°C, F >
60Hz
0.6
0.7
*
*
°C/W
RESISTANCE, DC,
junction to case
TC = –55 to
+125°C
0.9
1.1
*
*
°C/W
RESISTANCE, DC,
junction to air
TC = –55 to
+125°C
30
TEMPERATURE RANGE, case Meets full range
specification
-25
*
+85
*
°C/W
*
°C
NOTES: 1. (All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. 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
PA13 • PA13A
Product Innovation From
POWER RATING
Not all vendors use the same method to rate the power handling 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 conservative 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 expressed 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.
TYPICAL APPLICATION
+73V
47µF
2.5VP-P
3
PA13
1
7,8
5,6
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 Precision Power in 1981 using thermistors which assure a negative
temperature coefficient in the quiescent current. The reliability
benefits of this added circuitry far outweigh the slight increase
in component count.
RCL–
7.8mH
4Ω
5Ap-p
RD
2K
.2Ω
.1µF
47µF
THERMAL STABILITY
.1µF
RCL+
11,12
9,10 .2Ω
2
CF
–22V
50pF
RF
1K
L* 1
YOKE DRIVER: –V =
t
RS
.5Ω
HIGH CURRENT ASYMMETRICAL SUPPLY
60
PA13
40
20
0
0
1.3
1.0
.7
–30
80
–60
40
20
–120
–150
0
–180
–210
10
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
COMMON MODE REJECTION
8
120
100
80
60
10.0
6
4
2
0
O
=0
VO =
24V
VO = 0
5.0
2.5
V
RCL = .18Ω, RFO = 0
7.5
VO = –24
V
0
–50 –25 0
25 50 75 100 125
CASE TEMPERATURE, TC (°C)
POWER RESPONSE
100
–90
–20
1
RCL = .06Ω, RFO = ∞
12.5
PHASE RESPONSE
0
100
60
15.0
.4
–50 –25 0
25 50 75 100 125
CASE TEMPERATURE, TC (°C)
20 40 60 80 100 120 140
CASE TEMPERATURE, TC (°C)
PHASE, Ф (°)
OPEN LOOP GAIN, A (dB)
REJECTION, CMR (dB)
4
1.6
SMALL SIGNAL RESPONSE
120
CURRENT LIMIT, ILIM (A)
80
2.2
1.9
CURRENT LIMIT
17.5
1
10
46
32
22
VIN = 5V, tr = 100ns
| +VS | – | –VS | = 80V
15
| +VS | + | –VS | = 30V
10
6.8
4.6
10K
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
PULSE RESPONSE
| +VS | + | –VS | = 100V
68
OUTPUT VOLTAGE, VO (VP-P)
100
BIAS CURRENT
2.5
100
OLTAGE, VN (nV/√Hz)
120
NORMALIZED BIAS CURRENT, IB (X)
POWER DERATING
140
OLTAGE, VO (V)
INTERNAL POWER DISSIPATION, P (W)
TYPICAL PERFORMANCE GRAPHS
20K 30K
50K 70K .1M
FREQUENCY, F (Hz)
INPUT NOISE
70
50
40
30
PA13U
20
–180
Product Innovation From
COMMON MODE REJECTION
80
60
40
20
0
1
0
-2
-4
-6
4
6
8
TIME, t (µs)
10
12
QUIESCENT CURRENT
1.6
AV =10
VS = 37V
RL = 4Ω
1.4
W
W
0m
.1
=
PO
10
=4
PO
0W
.01
.003
100
2
P
300
=
12
1.2
TC
C
= –25°
°C
T C = 25
1.0
°C
T C = 85
.8
TC
= 125°C
.6
O
1K
3K 10K 30K
FREQUENCY, F (Hz)
.1M
.4
40
20K 30K
50K 70K .1M
FREQUENCY, F (Hz)
INPUT NOISE
100
2
HARMONIC DISTORTION
.3
.03
4.6
10K
VIN = 5V, tr = 100ns
0
PA13 • PA13A
6.8
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
4
1M
| +VS | + | –VS | = 30V
10
VOLTAGE DROP FROM SUPPLY (V)
3
100 1K 10K .1M
FREQUENCY, F (Hz)
10
15
PULSE RESPONSE
6
-8
1
10
8
120
100
1
| +VS | – | –VS | = 80V
22
INPUT NOISE VOLTAGE, VN (nV/√Hz)
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
10
–210
OUTPUT VOLTAGE, VO (V)
COMMON MODE REJECTION, CMR (dB)
–20
1
DISTORTION, (%)
–120
–150
0
32
OUTPUT VOLTAGE,
PHASE, Ф (°
40
–90
NORMALIZED, IQ (X)
OPEN LOOP GAIN
60
50
60
70
80
90 100
TOTAL SUPPLY VOLTAGE, VS (V)
70
50
40
30
20
10
10
1K
100
10K
FREQUENCY, F (Hz)
.1M
OUTPUT VOLTAGE SWING
6
5
–VO
4
3
+VO
2
1
0
3
6
9
12
OUTPUT CURRENT, IO (A)
15
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 selection; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
MA
L
OW
D
AK
ER
5°C
5°C
E
BR
2.0
TH
C
=2
=8
D
4.0
3.0
C
T
ON
T
6.0
ms
0.5 s
t = 1m
s
t=
5m
10
t=
N
1.0
e
tat
ys
.6
ad
ste
PA13U
SOA
15
C
SE
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 voltage 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.
OUTPUT CURRENT FROM +VS OR -VS (A)
SAFE OPERATING AREA (SOA)
.4
10
20
30
40 50
70
90
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, VS - VO (V)
5
PA13 • PA13A
Product Innovation From
1. Capacitive and dynamic* inductive loads up to the following maximum are safe with the current limits set as
specified.
±VS
50V
40V
35V
30V
25V
20V
15V
CAPACITIVE LOAD
ILIM = 5A
ILIM = 10A
200µF
500µF
2.0mF
7.0mF
25mF
60mF
150mF
125µF
350µF
850µF
2.5mF
10mF
20mF
60mF
INDUCTIVE LOAD
ILIM = 5A
ILIM = 10A
5mH
15mH
50mH
150mH
500mH
1,000mH
2,500mH
2.0mH
3.0mH
5.0mH
10mH
20mH
30mH
50mH
*If the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 12.5V below the supply rail with ILIM = 10A or 27V below the supply rail with ILIM = 5A while the amplifier is current limiting,
the inductor must be capacitively coupled or the current limit must be lowered to meet SOA criteria.
2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rail or common if
the current limits are set as follows at TC = 25°C:
±VS
SHORT TO ±VS
C, L, OR EMF LOAD
SHORT TO
COMMON
45V
40V
35V
30V
25V
20V
15V
.43A
.65A
1.0A
1.7A
2.7A
3.4A
4.5A
3.0A
3.4A
3.9A
4.5A
5.4A
6.7A
9.0A
These simplified limits may be exceeded with further analysis using the operating conditions for a specific application.
CURRENT LIMITING
Refer to Application Note 9, "Current Limiting", for details of both fixed and foldover current limit operation. Visit the
Apex Precision Power web site at www.cirrus.com for a copy of Power_design.exe which plots current limits vs.
steady state SOA. Beware that current limit should be thought of as a ±20% function initially and varies about 2:1
over the range of –55°C to 125°C.
For fixed current limit, leave pin 4 open and use equations 1 and 2.
RCL =
ICL =
0.65
ICL
0.65
RCL
(1)
(2)
Where:
ICL is the current limit in amperes.
RCL is the current limit resistor in ohms.
6
PA13U
Product Innovation From
PA13 • PA13A
For certain applications, foldover current limit adds a slope to the current limit which allows more power to be delivered to the load without violating the SOA. For maximum foldover slope, ground pin 4 and use equations 3 and 4.
0.65 + (VO * 0.014)
RCL
ICL =
RCL =
(3)
0.65 + (VO * 0.014)
ICL
Where:
VO is the output voltage in volts.
(4)
Most designers start with either equation 1 to set RCL for the desired current at 0v out, or with equation 4 to set RCL at
the maximum output voltage. Equation 3 should then be used to plot the resulting foldover limits on the SOA graph.
If equation 3 results in a negative current limit, foldover slope must be reduced. This can happen when the output
voltage is the opposite polarity of the supply conducting the current.
In applications where a reduced foldover slope is desired, this can be achieved by adding a resistor (RFO) between
pin 4 and ground. Use equations 4 and 5 with this new resistor in the circuit.
0.65 +
ICL =
VO * 0.14
10.14 + RFO
RCL
0.65 +
RCL =
Where:
RFO is in K ohms.
VO * 0.14
10.14 + RFO
ICL
(5)
(6)
CONTACTING CIRRUS LOGIC SUPPORT
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact [email protected]
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
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CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
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Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
PA13U
7