CIRRUS PA51_09

PA51PA51
• PA51A
• PA51A
PA51,
P r o d u c t IPA51A
Innnnoovvaa t i o n FFr roomm
Power Operational Amplifier
FEATURES
• WIDE SUPPLY RANGE — ±10 to ±40V
• HIGH OUTPUT CURRENT — ±10A Peak
• 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
8-pin TO-3
PACKAGE STYLE CE
TYPICAL APPLICATION
C1
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 critical. These
amplifiers are not recommended for audio, transducer 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. Ultrasonically
bonded aluminum wires provide reliable interconnections at
all operating temperatures. The 8-pin TO-3 package is electrically isolated and hermetically sealed. The use of compressible thermal washers and/or improper mounting torque will
void the product warranty. Please see “General Operating
Considerations”.
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 automatically compensated.
EQUIVALENT SCHEMATIC
EXTERNAL CONNECTIONS
R1
DAC
0/6A
PA51
R2
2.5K
R4
–28V
R CL+
CL+
2
OUT
1
OUTPUT
+IN 4
TOP VIEW
2
–IN
Q3
R5
.5Ω
PROGRAMMABLE TORQUE CIRCUIT
3
Q1B
M
.1Ω
MOTOR CURRENT IS A FUNCTION OF VIN
+VS
5
4
A1
.1Ω
4.16K
3
Q1A
R3
+10V
0/+5V
1
5
–VS
6
7
8
CL–
R CL–
N.C.
Q4
C1
8
Q6A
Q6B
6
PA51U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 20091
APEX − PA51UREVR
PA51 • PA51A
P r o d u c t I n n o v a t i o nF r o m
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, junction1
TEMPERATURE, pin solder -10s
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 2, 5
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. power
BIAS CURRENT, initial
BIAS CURRENT, vs. temperature
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
OFFSET CURRENT, vs. temperature
INPUT IMPEDANCE, common mode
INPUT IMPEDANCE, differential
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE3
COMMON MODE REJECTION, DC3
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C, VCM = ±VS –6V
GAIN
OPEN LOOP GAIN at 10Hz
GAIN BANDWIDTH PRODUCT @ 1MHz
POWER BANDWIDTH
PHASE MARGIN
Full temp. range, full load
TC = 25°C, full load
TC = 25°C, IO = 8A, VO = 40VPP
Full temperature range
OUTPUT
VOLTAGE SWING3
VOLTAGE SWING3
VOLTAGE SWING3
CURRENT
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD, unity gain
CAPACITIVE LOAD, gain > 4
TC = 25°C, IO = 10A
Full temp. range, IO = 4A
Full temp. range, IO = 68mA
TC = 25°C
TC = 25°C, 2V step
TC = 25°C, RL = 6Ω
Full temperature range
Full temperature range
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
Full temperature range
TC = 25°C
THERMAL
RESISTANCE, AC, junction to case4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
MIN
PA51
TYP
PA51A
MAX
MIN TYP
±VS–6
70
±5
±10
±35
±20
±15
±.05
±.02
±12
±.05
250
10
3
±VS–3
110
115
1
16
45
94
10
±VS–8
±VS–6
±VS–6
±10
1.0
±10
F > 60Hz
F < 60Hz
Meets full range specifications
80V
10A
97W
±37V
±VS
200°C
300°C
–65 to +150°C
–55 to +125°C
–25
MAX
UNITS
±10
±65
±40
±30
*
80
±2
±8
*
±40
*
*
*
±30
*
*
±5
±10
*
*
*
*
*
*
mV
µV/°C
µV/V
µV/W
nA
nA/°C
nA/V
nA
nA/°C
MΩ
MΩ
pF
V
dB
*
*
*
*
*
*
dB
MHz
kHz
°
*
*
*
*
*
*
*
*
*
1.5
*
SOA
*
V
V
V
A
µs
V/µs
nF
±28
2.6
±36
*
10
V
mA
1.0
1.5
30
1.2
*
*
1.8
*
*
*
+85
–55
+125
±VS–5
±VS–4
2
2.6
±34
*
±40
*
°C/W
°C/W
°C/W
°C
NOTES: * The specification of PA51A is identical to the specification for PA51 in applicable column to the left.
1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to
achieve high MTTF.
2. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition.
3. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.
4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
5. Full temperature range specifications are guaranteed but not 100% tested.
CAUTION
2
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
PA51U
PA51 • PA51A
POWER DERATING
OUTPUT VOLTAGE SWING
0
0
120
PA51A
25
50
75
100 125
TEMPERATURE, T (°C)
150
SMALL SIGNAL RESPONSE
6
4.5
2.5
10
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
OPEN LOOP GAIN, AOL (dB)
–210
0
–2
–4
–6
–8
0
DISTORTION (%)
6 8
4
TIME, (s)
2
VS = 36V
RL = 4Ω
GAIN = 10
1W
PO
=.
.3
PO
.1
=
5W
W
PO
.03
100
=
80
60
40
20
0
50
300
1K
3K 10K
FREQUENCY, F (Hz)
30K
1.6
1
10
100 1K 10K .1M
FREQUENCY, F (Hz)
1M
QUIESCENT CURRENT
1.4
1.2
1.0
.8
T C = 125°C
T C = 25°C
°C
TC
=
5
–5
.6
.4
3
2
1
RCL = 0.3Ω
50
0
25
75 100 125
CASE TEMPERATURE, TC (°C)
VS = 40V
50
36
RL = 8Ω
26
19
13
RL = 3Ω
9.7
7
10K
20K 30K
50K 70K .1M
FREQUENCY, F (Hz)
COMMON MODE REJECTION
100
12
HARMONIC DISTORTION
1
PA51U
10
120
4
70
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
10
RCL = .12Ω
POWER RESPONSE
PHASE RESPONSE
1
CURRENT LIMIT
5
0
-25
10
–150
COMMON MODE REJECTION, CMR (dB)
2
.01
30
2
4
6
8
OUTPUT CURRENT, IO (A)
–120
NORMALIZED QUIESCENT CURRENT, IQ (X)
OUTPUT VOLTAGE, VO (V)
RL = 5Ω
GAIN = +1
4
3
0
–90
PULSE RESPONSE
8
10
5 to
=2
C
85°
–180
0
6
TC
0
–60
–20
1
=–
3.0
80
20
TC
3.5
–30
40
C
25°
4.0
100
60
CURRENT LIMIT, ILIM (A)
PA51
20
5.0
OUTPUT VOLTAGE, VO (VP-P)
40
7
20 30 40 50 60 70 80 90
TOTAL SUPPLY VOLTAGE, VS (V)
NORMALIZED BIAS CURRENT, IB (X)
60
5.5
BIAS CURRENT
2.5
2.2
1.9
1.6
1.3
1.0
.7
.4
–50 –25
0
25
50
75
100 125
CASE TEMPERATURE, TC (°C)
100
INPUT NOISE VOLTAGE, VN (nV/√Hz)
80
VOLTAGE DROP FROM SUPPLY (V)
100
PHASE, Ф (°)
INTERNAL POWER DISSIPATION, P (W)
P r o d u c t I n n o v a t i o nF r o m
INPUT NOISE
70
50
40
30
20
10
10
100
1K
10K
FREQUENCY, F (Hz)
.1M
3
PA51 • PA51A
P r o d u c t I n n o v a t i o nF r o m
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 and heat sink selection. The
"Application Notes" and "Technical Seminar" sections contain a wealth of information on specific types of applications.
Package outlines, heat sinks, mounting hardware and other
accessories are located in the "Packages and Accessories"
section. Evaluation Kits are available for most Apex Precision
Power product models, consult the "Evaluation Kit" section
for details. For the most current version of all Apex Precision
Power product data sheets, visit www.Cirrus.com.
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 voltage
exceeds specified limits.
3. The junction temperature of the output transistors.
SOA
T
C
=1
5°C
5°C
25
°C
ady
te
sta
0.5
L
=2
=8
ste
0.7
C
s
1.0
MA
5m
1.5
T
t=
2.0
C
ER
s
3.0
T
TH
1m
5.0
t=
OUTPUT CURRENT FROM +VS OR – VS (A)
10
7.0
0.3
0.2
±VS
40V
35V
30V
25V
20V
15V
CAPACITIVE LOAD
ILIM = 5A
ILIM = 10A
400µF
200µF
800µF
400µF
1,600µF
800µF
5.0mF
2.5mF
10mF
5.0mF
20mF
10mF
INDUCTIVE LOAD
ILIM = 5A
ILIM = 10A
11mH
4.3mH
20mH
5.0mH
35mH
6.2mH
50mH
15mH
400mH
20mH
**
100mH
* If the inductive load is driven near steady state conditions,
allowing the output voltage to drop more than 8V below the
supply rail with ILIM = 10A or 15V below the supply rail with
ILIM = 5A while the amplifier is current limiting, the inductor
should be capacitively coupled or the current limit must be
lowered to meet SOA criteria.
** Second breakdown effect imposes no limitation but thermal
limitations must still be observed.
2. The amplifier can handle any EMF generating or reactive
load and short circuits to the supply rail or shorts to common
if the current limits are set as follows at TC = 85°C.
±VS
45V
40V
35V
30V
25V
20V
15V
SHORT TO ±VS
C, L, OR EMF LOAD
0.1A
0.2A
0.3A
0.5A
1.2A
1.5A
2.0A
SHORT TO
COMMON
1.3A
1.5A
1.6A
2.0A
2.4A
3.0A
4.0A
These simplified limits may be exceeded with further analysis
using the operating conditions for a specific application.
3.The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback,
external fast-recovery diodes should be used.
CURRENT LIMIT
5
15
20
30
40 50
70 80
7
10
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS – VO (V)
The SOA curves combine the effect of 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. The following guidelines may save extensive
analytical efforts.
4
1. Under transient conditions, capacitive and dynamic* inductive loads up to the following maximums are safe:
Proper operation requires the use of two current limit resistors, connected as shown in the external connection diagram.
The minimum value for RCL is .06 ohm, however for optimum
reliability it should be set as high as possible. Refer to the
“General Operating Considerations” section of the handbook
for current limit adjust details.
PA51U
P r o d u c t I n n o v a t i o nF r o m
PA51 • PA51A
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
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
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
LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
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.
PA51U
5