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PDF OPA547 Data sheet ( Hoja de datos )
| Número de pieza | OPA547 | |
| Descripción | High-Voltage / High-Current OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OPA547 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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® OPA547
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
FEATURES
q WIDE SUPPLY RANGE
Single Supply: +8V to +60V
Dual Supply: ±4V to ±30V
q HIGH OUTPUT CURRENT:
500mA Continuous
q WIDE OUTPUT VOLTAGE SWING
q FULLY PROTECTED:
Thermal Shutdown
Adjustable Current Limit
q OUTPUT DISABLE CONTROL
q THERMAL SHUTDOWN INDICATOR
q HIGH SLEW RATE: 6V/µs
q LOW QUIESCENT CURRENT
q PACKAGES:
7-Lead TO-220
7-Lead DDPAK Surface-Mount
APPLICATIONS
q VALVE, ACTUATOR DRIVER
q SYNCHRO, SERVO DRIVER
q POWER SUPPLIES
q TEST EQUIPMENT
q TRANSDUCER EXCITATION
q AUDIO AMPLIFIER
DESCRIPTION
The OPA547 is a low cost, high-voltage/high-current
operational amplifier ideal for driving a wide variety
of loads. A laser-trimmed monolithic integrated cir-
cuit provides excellent low-level signal accuracy and
high output voltage and current.
The OPA547 operates from either single or dual sup-
plies for design flexibility. In single supply operation,
the input common-mode range extends below ground.
The OPA547 is internally protected against over-
temperature conditions and current overloads. In addi-
tion, the OPA547 was designed to provide an accurate,
user-selected current limit. Unlike other designs which
use a “power” resistor in series with the output current
path, the OPA547 senses the load indirectly. This
allows the current limit to be adjusted from 0 to
750mA with a 0 to 150µA control signal. This is easily
done with a resistor/potentiometer or controlled digi-
tally with a voltage-out or current-out DAC.
The Enable/Status (E/S) pin provides two functions.
An input on the pin not only disables the output stage
to effectively disconnect the load but also reduces the
quiescent to conserve power. The E/S pin output can
be monitored to determine if the OPA547 is in thermal
shutdown.
The OPA547 is available in an industry-standard
7-lead staggered TO-220 package and a 7-lead DDPAK
surface-mount plastic power package. The copper tab
allows easy mounting to a heat sink or circuit board
for excellent thermal performance. It is specified for
operation over the extended industrial temperature
V+ range, –40°C to +85°C.
VI–N
OPA547
VO
VI+N ILIM
RCL
(0.25W
Signal Resistor)
E/S
V–
RCL sets the current limit
value from 0 to 750mA.
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-11326A
OPPrinAted5in4U7.S.A. May, 1997
®
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TCASE = +25°C, VS = ±30V and E/S pin open, unless otherwise noted.
100
90
80
70
60
50
40
30
20
10
COMMON-MODE REJECTION vs FREQUENCY
100 1k 10k 100k
Frequency (Hz)
1M
120
100
80
60
40
20
0
1
POWER SUPPLY REJECTION
vs FREQUENCY
+PSRR
–PSRR
10 100 1k 10k 100k 1M
Frequency (Hz)
SMALL-SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
50
40
3 G = +1
20
G = –1
10
0
0 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
Load Capacitance (pF)
OPEN-LOOP GAIN, COMMON-MODE REJECTION,
AND POWER SUPPLY REJECTION vs TEMPERATURE
105 120
AOL
100 115
CMRR
95 100
PSRR
90 95
85
–75 –50 –25
0 25 50 75
Temperature (°C)
90
100 125 150
1.25
GAIN-BANDWIDTH PRODUCT AND
SLEW RATE vs TEMPERATURE
7.5
1
0.75
GBW
SR+
7
6.5
0.5
0.25
SR–
6
5.5
0
–75 –50 –25
0 25 50 75
Temperature (°C)
5
100 125 150
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
0.1
RL = 50Ω
G = +3
1W
0.01
0.1W
0.001
6.25W
0.0001
20
100 1k
Frequency (Hz)
10k 20k
®
5 OPA547
5 Page 
Output Disable and Thermal Shutdown Status
As mentioned earlier, the OPA547’s output can be disabled
and the disable status can be monitored simultaneously.
Figures 9 and 10 provide examples using a single supply and
dual supplies, respectively.
OUTPUT STAGE COMPENSATION
The complex load impedances common in power op amp
applications can cause output stage instability. For normal
operation output compensation circuitry is not typically
required. However, if the OPA547 is intended to be driven
into current limit, a R/C network may be required. Figure 11
shows an output series R/C compensation (snubber) network
(3Ω in series with 0.01µF) which generally provides excel-
lent stability. Some variations in circuit values may be
required with certain loads.
V+
OPA547
E/S
V–
Open Drain
(Output Disable)
HCT
(Thermal Status
Shutdown)
FIGURE 9. Output Disable and Thermal Shutdown Status
with a Single Supply.
OUTPUT PROTECTION
Reactive and EMF-generating loads can return load cur-
rent to the amplifier, causing the output voltage to exceed
the power supply voltage. This damaging condition can
be avoided with clamp diodes from the output terminal to
the power supplies as shown in Figure 11. Schottkey
rectifier diodes with a 1A or greater continuous rating are
recommended.
V+
R1
5kΩ
VIN
R2
20kΩ
G = – R2 = –4
R1
D1
OPA547
D2
3Ω
(Carbon) Motor
0.01µF
V–
D1, D2 : International Rectifier 11DQ06.
FIGURE 11. Motor Drive Circuit.
V+
5V
OPA547
E/S
1
6
(1)
Zetex
5 ZVN3310
HCT or TTL In
2
4N38
Optocoupler
4
V–
NOTE: (1) Optional—may be required to limit leakage
current of optocoupler at high temperatures.
1
7.5kΩ
1W
2
4N38
Optocoupler
5V
6
5
TTL Out
4
FIGURE 10. Output Disable and Thermal Shutdown Status with Dual Supplies.
®
11 OPA547
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet OPA547.PDF ] | |
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