ETC PA51A

POWER OPERATIONAL AMPLIFIERS
PA51 • PA51A
M I C R O T E C H N O L O G Y
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
TYPICAL APPLICATION
C1
R3
+10V
DESCRIPTION
0/+5V
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”.
.1 Ω
R1
DAC
4.16K
0/6A
PA51
R2
2.5K
R4
–28V
MOTOR CURRENT IS A FUNCTION OF VIN
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.
EXTERNAL CONNECTIONS
3
R CL+
CL+
+VS
2
3
OUT
1
OUTPUT
+IN 4
Q1B
R5
.5 Ω
PROGRAMMABLE TORQUE CIRCUIT
EQUIVALENT SCHEMATIC
Q1A
M
.1 Ω
TOP VIEW
2
–IN
Q3
5
4
6
A1
1
5
–VS
7
8
CL–
R CL–
N.C.
Q4
C1
8
Q6B
Q6A
6
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PA51 • PA51A
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
80V
10A
97W
±VS –3V
±VS
200°C
300°C
–65 to +150°C
–55 to +125°C
PA51
TEST CONDITIONS
2, 5
PA51A
MIN
TYP
MAX
±10
±65
±VS–6
70
±5
±10
±35
±20
±15
±.05
±.02
±5
±.01
250
10
3
±VS–3
110
MIN
TYP
MAX
UNITS
±5
±40
*
80
±2
*
*
*
*
*
*
±2
*
*
*
*
*
*
mV
µV/°C
µV/V
µV/W
nA
nA/°C
nA/V
nA
nA/°C
MΩ
MΩ
pF
V
dB
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
±40
±12
±20
±3
GAIN
OPEN LOOP GAIN at 10Hz
Full temp. range, full load
GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, full load
POWER BANDWIDTH
TC = 25°C, IO = 8A, VO = 40VPP
PHASE MARGIN
Full temperature range
94
10
115
1
16
45
*
*
*
*
*
*
dB
MHz
kHz
°
*
*
V
V
V
A
µs
V/µs
nF
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
±VS–8
±VS–6
±VS–6
±10
1.0
±VS–5
±VS–4
*
*
*
*
2
2.6
*
*
*
1.5
SOA
*
*
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
Full temperature range
TC = 25°C
±10
±28
2.6
±36
10
1.0
1.5
30
1.2
1.8
*
±34
*
±40
*
V
mA
*
*
*
*
*
°C/W
°C/W
°C/W
°C
THERMAL
RESISTANCE, AC, junction to case4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
NOTES:
*
1.
2.
3.
4.
5.
CAUTION
F > 60Hz
F < 60Hz
Meets full range specifications
–25
+85
–55
+125
The specification of PA51A is identical to the specification for PA51 in applicable column to the left.
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF.
The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition.
+VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.
Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
Full temperature range specifications are guaranteed but not 100% tested.
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.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
PA51 • PA51A
POWER DERATING
PA51
20
PA51A
0
0
25
50
75 100 125 150
TEMPERATURE, T (°C)
4.5
OPEN LOOP GAIN, AOL (dB)
PHASE, ϕ (°)
0
0
–2
–4
–6
–8
0
4
6 8
TIME, (µs)
2
10 12
HARMONIC DISTORTION
10
DISTORTION (%)
VS = ±36V
RL = 4 Ω
3
GAIN = 10
1W
1
PO
=.
.3
PO
W
.1
.03
.01
30
=
5W
PO
=
50
100 300 1K 3K 10K 30K
FREQUENCY, F (Hz)
COMMON MODE REJECTION, CMR (dB)
2
0
2
1
80
60
40
20
0
1
10 100 1K 10K .1M
FREQUENCY, F (Hz)
1M
QUIESCENT CURRENT
1.6
50
R CL = 0.3 Ω
0
25
75 100 125
50
CASE TEMPERATURE, TC (°C)
VS = ±40V
36
RL = 8 Ω
26
19
13
9.7
7
10K
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
100
RL = 3 Ω
20K 30K
50K 70K .1M
FREQUENCY, F (Hz)
BIAS CURRENT
2.5
2.2
1.9
1.6
1.3
1
.7
-50 -25 0
25 50 75 100 125
CASE TEMPERATURE, TC (°C)
INPUT NOISE
100
1.4
25°C
TC = 1
1.0
TC = 125°C
.8
3
POWER RESPONSE
COMMON MODE REJECTION
1.2
4
70
120
NORMALIZED QUIESCENT CURRENT, IQ (X)
OUTPUT VOLTAGE, VO (V)
4
–210
R CL = .12 Ω
5
0
-25
10
–120
–180
RL = 5 Ω
2
8
4
6
OUTPUT CURRENT, IO (A)
–90
–150
GAIN = +1
to
6
PHASE RESPONSE
0
20
6
5
O
–V
0
–60
PULSE RESPONSE
–2
°C
85
2.5
80
8
85°C
TC
–30
10 100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
TC
to
= 25
=
3.0
100
–20
1
+V O
TC
3.5
SMALL SIGNAL RESPONSE
40
+V O
4.0
120
60
°C
5
= –2
CURRENT LIMIT, I LIM (A)
40
5.0
OUTPUT VOLTAGE, VO (VPP )
60
CURRENT LIMIT
7
NORMALIZED BIAS CURRENT, I B (X)
80
OUTPUT VOLTAGE SWING
5.5
INPUT NOISE VOLTAGE, VN (nV/ √ Hz)
100
VOLTAGE DROP FROM SUPPLY (V)
INTERNAL POWER DISSIPATION, P(W)
TYPICAL PERFORMANCE
GRAPHS
TC = -55°C
.6
.4
30
40
50
60 70
20
80
TOTAL SUPPLY VOLTAGE, VS (V)
70
50
40
30
20
10
10
10K
1K
100
FREQUENCY, F (Hz)
.1M
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
OPERATING
CONSIDERATIONS
PA51 • PA51A
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.apexmicrotech.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 product
models, consult the "Evaluation Kit" section for details. For the
most current version of all Apex product data sheets, visit
www.apexmicrotech.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.
t=
7.0
3.0
=1
25
°C
5°C
ady
ste
te
sta
0.7
0.5
C
5 °C
s
1.0
T
=2
=8
5m
1.5
TC
t=
2.0
TC
TH
ER
MA
L
s
5.0
1m
OUTPUT CURRENT FROM +V S OR –VS (A)
10
0.3
0.2
7
10
5
15
20
30
40 50
70 80
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V S –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.
1. Under transient conditions, capacitive and dynamic* inductive loads up to the following maximums are safe:
CAPACITIVE LOAD
INDUCTIVE LOAD
±VS
ILIM = 5A
ILIM = 10A
ILIM = 5A
ILIM = 10A
40V
35V
30V
25V
400µF
800µF
1,600µF
5.0mF
200µF
400µF
800µF
2.5mF
11mH
20mH
35mH
50mH
4.3mH
5.0mH
6.2mH
15mH
20V
15V
10mF
20mF
5.0mF
10mF
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
SHORT TO ±VS
C, L, OR EMF LOAD
SHORT TO
COMMON
45V
40V
35V
30V
25V
20V
15V
0.1A
0.2A
0.3A
0.5A
1.2A
1.5A
2.0A
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
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.
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
PA51U REV. L FEBRUARY 2000 © 2000 Apex Microtechnology Corp.