Document Outline
- FEATURES
- DESCRIPTION
- APPLICATIONS
- ABSOLUTE MAXIMUM RATINGS
- PACKAGE/ORDERING INFORMATION
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- APPLICATIONS INFORMATION
- POWER SUPPLIES
- CONTROL REFERENCE (Ref) PIN
- ADJUSTABLE CURRENT LIMIT
- Resistor-Controlled Current Limit
- Digitally-Controlled Current Limit
- ENABLE/STATUS (E/S) PIN
- Output Disable
- Thermal Shutdown Status
- Output Disable and Thermal Shutdown Status
- SAFE OPERATING AREA
- POWER DISSIPATION
- THERMAL PROTECTION
- AMPLIFIER MOUNTING AND HEAT SINKING
- OUTPUT STAGE COMPENSATION
- OUTPUT PROTECTION
- VOLTAGE SOURCE APPLICATION
- PROGRAMMABLE POWER SUPPLY
OPA549
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
DESCRIPTION
The OPA549 is a low-cost, high-voltage/high-current opera-
tional amplifier ideal for driving a wide variety of loads. This
laser-trimmed monolithic integrated circuit provides excellent
low-level signal accuracy and high output voltage and current.
The OPA549 operates from either single or dual supplies for
design flexibility. The input common-mode range extends
below the negative supply.
The OPA549 is internally protected against over-temperature
conditions and current overloads. In addition, the OPA549
provides an accurate, user-selected current limit. Unlike
other designs which use a "power" resistor in series with the
output current path, the OPA549 senses the load indirectly.
This allows the current limit to be adjusted from 0A to 10A
with a resistor/potentiometer, or controlled digitally with a
voltage-out or current-out Digital-to-Analog Converter (DAC).
The Enable/Status (E/S) pin provides two functions. It can be
monitored to determine if the device is in thermal shutdown,
and it can be forced low to disable the output stage and
effectively disconnect the load.
The OPA549 is available in an 11-lead power package. Its
copper tab allows easy mounting to a heat sink for excellent
thermal performance. Operation is specified over the ex-
tended industrial temperature range, 40
C to +85
C.
FEATURES
q
HIGH OUTPUT CURRENT:
8A Continuous
10A Peak
q
WIDE POWER-SUPPLY RANGE:
Single Supply: +8V to +60V
Dual Supply:
4V to
30V
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: 9V/
s
q
CONTROL REFERENCE PIN
q
11-LEAD POWER PACKAGE
APPLICATIONS
q
VALVE, ACTUATOR DRIVERS
q
SYNCHRO, SERVO DRIVERS
q
POWER SUPPLIES
q
TEST EQUIPMENT
q
TRANSDUCER EXCITATION
q
AUDIO POWER AMPLIFIERS
OPA549
V+
E/S
R
CL
R
CL
sets the current limit
value from 0A to 10A.
(Very Low Power Dissipation)
I
LIM
V
O
V
Ref
ES Pin
Forced Low: Output disabled.
Indicates Low: Thermal shutdown.
OPA
549
OPA
549
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1999-2003, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SBOS093D MARCH 1999 REVISED NOVEMBER 2003
All trademarks are the property of their respective owners.
OPA549
SBOS093D
2
www.ti.com
Output Current ................................................ See SOA Curve (Figure 6)
Supply Voltage, V+ to V ................................................................... 60V
Input Voltage Range ....................................... (V) 0.5V to (V+) + 0.5V
Input Shutdown Voltage ................................................... Ref 0.5 to V+
Operating Temperature .................................................. 40
C to +125
C
Storage Temperature ..................................................... 55
C to +125
C
Junction Temperature ...................................................................... 150
C
Lead Temperature (soldering, 10s) ................................................. 300
C
ESD Capability (Human Body Model) ............................................. 2000V
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may de-
grade device reliability.
CONNECTION DIAGRAM
In
+In
Ref
I
LIM
E/S
V+
V
O
1
3
5
7
9
11
2
4
6
8
10
V
Tab connected to V. Do not use to conduct current.
Connect both pins 1 and 2 to output.
Connect both pins 5 and 7 to V.
Connect both pins 10 and 11 to V+.
ABSOLUTE MAXIMUM RATINGS
(1)
For the most current package and ordering information, see
the Package Option Addendum located at the end of this
datasheet.
PACKAGE/ORDERING INFORMATION
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
OPA549
SBOS093D
3
www.ti.com
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, T
A
= 40
C to +85
C.
At T
CASE
= +25
C, V
S
=
30V, Ref
= 0V, and E/S pin open, unless otherwise noted.
OPA549T, S
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
V
OS
Input Offset Voltage
V
CM
= 0V, I
O
= 0
1
5
mV
vs Temperature
dV
OS
/dT
T
CASE
= 40
C to +85
C
20
V/
C
vs Power Supply
PSRR
V
S
=
4V to
30V, Ref = V
25
100
V/V
INPUT BIAS CURRENT
(1)
Input Bias Current
(2)
I
B
V
CM
= 0V
100
500
nA
vs Temperature
T
CASE
= 40
C to +85
C
0.5
nA/
C
Input Offset Current
I
OS
V
CM
= 0V
5
50
nA
NOISE
Input Voltage Noise Density
e
n
f = 1kHz
70
nV/
Hz
Current Noise Density
i
n
f = 1kHz
1
pA/
Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range: Positive
V
CM
Linear Operation
(V+) 3
(V+) 2.3
V
Negative
V
CM
Linear Operation
(V) 0.1
(V) 0.2
V
Common-Mode Rejection Ratio
CMRR
V
CM
= (V) 0.1V to (V+) 3V
80
95
dB
INPUT IMPEDANCE
Differential
10
7
|| 6
|| pF
Common-Mode
10
9
|| 4
|| pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
A
OL
V
O
=
25V, R
L
= 1k
100
110
dB
V
O
=
25V, R
L
= 4
100
dB
FREQUENCY RESPONSE
Gain Bandwidth Product
GBW
0.9
MHz
Slew Rate
SR
G = 1, 50Vp-p Step, R
L
= 4
9
V/
s
Full-Power Bandwidth
See Typical Curve
Settling Time:
0.1%
G = 10, 50V Step
20
s
Total Harmonic Distortion + Noise
(3)
THD+N
f = 1kHz,R
L
= 4
,G = +3, Power = 25W
0.015
%
OUTPUT
Voltage Output, Positive
I
O
= 2A
(V+) 3.2
(V+) 2.7
V
Negative
I
O
= 2A
(V) + 1.7
(V) + 1.4
V
Positive
I
O
= 8A
(V+) 4.8
(V+) 4.3
V
Negative
I
O
= 8A
(V) + 4.6
(V) + 3.9
V
Negative
R
L
= 8
to V
(V) + 0.3
(V) + 0.1
V
Maximum Continuous Current Output: dc
(4)
8
A
ac
(4)
Waveform Cannot Exceed 10A peak
8
A rms
Output Current Limit
Current Limit Range
0 to
10
A
Current Limit Equation
I
LIM
= 15800 4.75V/(7500
+ R
CL
)
A
Current Limit Tolerance
(1)
R
CL
= 7.5k
(I
LIM
=
5A), R
L
= 4
200
500
mA
Capacitive Load Drive (Stable Operation) C
LOAD
See Typical Curve
Output Disabled
Leakage Current
Output Disabled, V
O
= 0V
2000
200
+2000
A
Output Capacitance
Output Disabled
750
pF
OUTPUT ENABLE/STATUS (E/S) PIN
Shutdown Input Mode
V
E/S
High (output enabled)
E/S Pin Open or Forced High
(Ref) + 2.4
V
V
E/S
Low (output disabled)
E/S Pin Forced Low
(Ref) + 0.8
V
I
E/S
High (output enabled)
E/S Pin Indicates High
50
A
I
E/S
Low (output disabled)
E/S Pin Indicates Low
55
A
Output Disable Time
1
s
Output Enable Time
3
s
Thermal Shutdown Status Output
Normal Operation
Sourcing 20
A
(Ref) + 2.4
(Ref) + 3.5
V
Thermally Shutdown
Sinking 5
A, T
J
> 160
C
(Ref) + 0.2
(Ref) + 0.8
V
Junction Temperature, Shutdown
+160
C
Reset from Shutdown
+140
C
Ref (Reference Pin for Control Signals)
Voltage Range
V
(V+) 8
V
Current
(2)
3.5
mA
POWER SUPPLY
Specified Voltage
V
S
30
V
Operating Voltage Range, (V+) (V)
8
60
V
Quiescent Current
I
Q
I
LIM
Connected to Ref I
O
= 0
26
35
mA
Quiescent Current in Shutdown Mode
I
LIM
Connected to Ref
6
mA
TEMPERATURE RANGE
Specified Range
40
+85
C
Operating Range
40
+125
C
Storage Range
55
+125
C
Thermal Resistance,
JC
1.4
C/W
Thermal Resistance,
JA
No Heat Sink
30
C/W
NOTES: (1) High-speed test at T
J
= +25
C. (2) Positive conventional current is defined as flowing into the terminal. (3) See "Total Harmonic Distortion + Noise vs
Frequency" in the Typical Characteristics section for additional power levels. (4) See "Safe Operating Area" (SOA) in the Typical Characteristics section.
OPA549
SBOS093D
4
www.ti.com
TYPICAL CHARACTERISTICS
At T
CASE
= +25
C, V
S
=
30V, and E/S pin open, unless otherwise noted.
60
40
20
0
20
40
60
80
140
120
100
130
120
110
100
90
80
70
60
50
40
Input Bias Current (nA)
Temperature (
C)
INPUT BIAS CURRENT vs TEMPERATURE
I
B
+I
B
30
20
10
0
10
20
30
200
180
160
140
120
100
80
60
40
20
0
Input Bias Current (nA)
Common-Mode Voltage (V)
INPUT BIAS CURRENT
vs COMMON-MODE VOLTAGE
1
10
100
1k
10k
100k
1M
10M
120
100
80
60
40
20
0
20
40
0
20
40
60
80
100
120
140
160
Gain (dB)
Phase (
)
Frequency (Hz)
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
0
5
10
15
20
25
30
9
8
7
6
5
4
3
2
1
0
Current Limit (A)
Supply Voltage (V)
CURRENT LIMIT vs SUPPLY VOLTAGE
+I
LIM
, 5A
I
LIM
, 5A
+I
LIM
, 2A
I
LIM
, 2A
+I
LIM
, 8A
I
LIM
, 8A
75
50
25
0
25
50
75
100
125
30
25
20
15
10
5
0
Quiescent Current (mA)
Temperature (
C)
QUIESCENT CURRENT vs TEMPERATURE
V
S
=
30V
V
S
=
5V
I
Q
Shutdown (output disabled)
75
50
25
0
25
50
75
100
125
9
8
7
6
5
4
3
2
1
0
Current Limit (A)
Temperature (
C)
CURRENT LIMIT vs TEMPERATURE
5A
2A
8A
OPA549
SBOS093D
5
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
CASE
= +25
C, V
S
=
30V, and E/S pin open, unless otherwise noted.
1
10
100
1k
10k
100k
300
250
200
150
100
50
0
Voltage Noise (nV/
Hz)
Frequency (Hz)
VOLTAGE NOISE DENSITY vs FREQUENCY
10
100
1k
10k
100k
1M
120
100
80
60
40
20
0
Power-Supply Rejection Ratio (dB)
Frequency (Hz)
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
PSRR
+PSRR
75
50
0
50
100
A
OL
125
120
110
100
90
80
A
OL
, CMRR, PSRR (dB)
Temperature (
C)
OPEN-LOOP GAIN, COMMON-MODE REJECTION RATIO,
AND POWER-SUPPLY REJECTION RATIO
vs TEMPERATURE
CMRR
PSRR
20
100
1k
10k
20k
1
0.1
0.01
0.001
THD+N (%)
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
G = +3
R
L
= 4
0.1W
1W
10W
75W
75
50
25
0
25
50
75
100
125
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
16
15
14
13
12
11
10
9
8
7
6
Gain-Bandwidth Product (MHz)
Slew Rate (V/
s)
Temperature (
C)
GAIN-BANDWIDTH PRODUCT AND
SLEW RATE vs TEMPERATURE
SR+
SR
GBW
10
100
1k
10k
100k
100
90
80
70
60
50
40
Common-Mode Rejection (dB)
Frequency (Hz)
COMMON-MODE REJECTION RATIO vs FREQUENCY
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