Burr-Brown OPA501RM High current, high power operational amplifier Datasheet

®
OPA501
High Current, High Power
OPERATIONAL AMPLIFIER
FEATURES
APPLICATIONS
● HIGH OUTPUT CURRENT: ±10A Peak
● MOTOR DRIVER
● WIDE POWER SUPPLY RANGE:
±10 to ±40V
● LOW QUIESCENT CURRENT: 2.6mA
● ISOLATED CASE TO-3 PACKAGE
●
●
●
●
SERVO AMPLIFIER
VALVE ACTUATOR
SYNCRO DRIVER
PROGRAMMABLE POWER SUPPLY
DESCRIPTION
V+
The OPA501 is a high output current operational
amplifier. It can be used in virtually all common op
amp circuits, yet is capable of output currents up to
±10A. Power supply voltages up to ±40V allow very
high output power for driving motors or other electromechanical loads.
Safe operating area is fully specified, and user-set
current limits provide protection for both the amplifier
and load. The class-B (zero output stage bias) provides
low quiescent current during small-signal conditions.
This rugged hybrid integrated circuit is packaged in a
metal 8-pin TO-3 package. Both industrial and military temperature range models are available.
3
2
+Output
Drive
+
RCL
5
1
Current
Sense
4
Output
–
RCL
8
–Output
Drive
6
V–
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
©
1983 Burr-Brown Corporation
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PDS-490F
Printed in U.S.A. August, 1993
SPECIFICATIONS
ELECTRICAL
At TC = +25°C, VS = ±28V, (OPA501RM, AM); VS = ±34V (OPA501SM, BM) unless otherwise noted.
OPA501RM, AM
PARAMETER
RATED OUTPUT(1, 2)
Output Current
Continuous(3)
Output Voltage(3)
DYNAMIC RESPONSE
Bandwidth, Unity Gain
Full Power Bandwidth
Slew Rate
INPUT OFFSET VOLTAGE
Initial Offset
vs Temperature
CONDITIONS
MIN
RL = 2Ω (RM, AM)
RL = 2.6Ω (SM, BM)
IO = 10A peak
±10
±10
±20
Small Signal
VO = 40Vp-p, RL = 8Ω
RL = 5Ω (RM, AM)
RL = 6.5Ω (SM, BM)
10
1.35
1.35
OPA501SM, BM
MAX
MIN
*
*
±26
±23
1
16
±5
±10
–25°C < T < +85°C (AM, BM)
–55°C < T < +125°C (RM, SM)
*
*
*
±10
±65
±35
vs Supply Voltage
INPUT BIAS CURRENT
Initial
vs Temperature
vs Supply Voltage
INPUT DIFFERENCE CURRENT
Initial
vs Temperature
TYP
TYP
MAX
UNITS
A
A
V
±29
*
*
MHz
kHz
V/µs
v/µs
±2
±5
±10
*
±40
mV
µV/°C
µV/°C
µV/V
TCASE = +25°C
15
±0.05
±0.02
40
*
*
*
20
nA
nA/°C
nA/V
TCASE = +25°C
–25°C < T < +85°C (AM, BM)
–55°C < T < +125°C (RM, SM)
±5
±0.01
±10
±2
±3
±0.01
nA
nA/°C
nA/°C
115
dB
dB
*
*
MΩ
MΩ
OPEN-LOOP GAIN, DC
RL = 6.5Ω (SM, BM)
RL = 5Ω (RM, AM)
94
98
INPUT IMPEDANCE
Differential
Common-mode
INPUT NOISE
Voltage Noise
fn = 10Hz to 10kHz
Current Noise
fn = 10Hz to 10kHz
INPUT VOLTAGE RANGE
Common-mode Voltage(4)
Common-mode Rejection
115
10
250
fn = 0.3Hz to 10Hz
3
*
5
fn = 0.3Hz to 10Hz
20
*
4.5
Linear Operation
f = DC, VCM = ±(|VS|–6)
POWER SUPPLY
Rated Voltage
Operating Voltage Range
Current, quiescent
±(|VS|–6)
70
±10
TEMPERATURE RANGE
Specification, RM, SM
AM, BM
Operating, derated
performance, AM, BM
Storage
case
THERMAL RESISTANCE
Steady State θJC
µVrms
*
*
±(|VS|–3)
110
±28
*
80
V
dB
V
V
mA
*
*
*
*
°C
°C
*
*
*
*
°C
°C
*
°C/W
–55
–25
+125
+85
–55
–65
+125
+150
2.2
*
*
±40
*
*
2.0
pAp-p
pArms
±34
±36
±10
±2.6
µVp-p
*
*
*Specification same as for OPA501RM, AM.
NOTES: (1) Package must be derated based on a junction-to-case thermal resistance of 2.2°C/W or a junction-to-ambient thermal resistance of 30°C/W. (2) Safe
Operating Area and Power Derating Curves must be observed. (3) With ±RSC = 0. Peak output current is typically greater than 10A if duty cycle and pulse width limitations
are observed. Output current greater than 10A is not guaranteed. (4) The absolute maximum voltage is 3V less than supply voltage.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
OPA501
2
ABSOLUTE MAXIMUM RATINGS
CONNECTION DIAGRAM
Power Supply Voltage (VS) ................................................................ ±40V
Power Dissipation at +25°C(1, 2) .......................................................... 79W
Differential Input Voltage ............................................................... ±VS –3V
Common-Mode Input Voltage .............................................................. ±VS
Operating Temperature Range ....................................... –55°C to +125°C
Storage Temperature Range .......................................... –65°C to +150°C
Lead Temperature (soldering, 10s) ................................................ +300°C
Junction Temperature .................................................................... +200°C
Output Short-Circuit Duration(3) ................................................ Continuous
Top View
+
RSC
+Output
Drive
V+
3
+In
NOTES: (1) At case temperature of +25°C. Derate at 2.2°C/W above case
temperature of +25°C. (2) Average dissipation. (3) Within safe operating
area and with appropriate derating.
–In
Current
Sense
2
VO
1
4
–
RSC
5
8
6
V–
7
NC
–Output
Drive
ORDERING INFORMATION
MODEL
OPA501AM
OPA501BM
OPA501RM
OPA501SM
PACKAGE
8-Pin
8-Pin
8-Pin
8-Pin
Metal
Metal
Metal
Metal
TO-3
TO-3
TO-3
TO-3
TEMPERATURE
RANGE
–25°C to +85°C
–25°C to +85°C
–55°C to +125°C
–55°C to +125°C
PACKAGE INFORMATION
MODEL
OPA501AM
OPA501BM
OPA501RM
OPA501SM
PACKAGE
PACKAGE DRAWING
NUMBER(1)
8-Pin Metal TO-3
8-Pin Metal TO-3
8-Pin Metal TO-3
8-Pin Metal TO-3
030
030
030
030
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
®
3
OPA501
TYPICAL PERFORMANCE CURVES
Typical at +25°C case and ±VS = 28VDC, unless otherwise noted.
COMMON MODE REJECTION vs FREQUENCY
100
–30
80
–60
Phase
60
–90
40
–120
Amplitude
20
120
–150
–180
0
–20
1
10
100
1k
10k
100k
1M
Common-Mode Rejection (dB)
0
Phase (degree)
Amplitude (dB)
OPEN-LOOP FREQUENCY RESPONSE
120
100
80
60
40
20
0
–210
10M
1
10
100
Frequency (Hz)
2.8
100k
1M
±40
AV = 10
2.4
±35
Output Voltage (Vpk)
Input Bias Current (Normalized)
10k
OUTPUT VOLTAGE SWING
vs POWER SUPPLY VOLTAGE
INPUT BIAS CURRENT vs TEMPERATURE
2.0
1.6
1.2
0.8
IO = 1A
±30
±25
IO = 5A
±20
IO = 10A
±15
0.4
0
–50
±10
–25
100
0
25
50
75
100
125
±10
±35
±40
1.8
Total Harmonic Distortion (%)
Maximum
Output
Maximum “Undistorted”
Sine Wave Output
RL = 8 Ω
AV = +10
TC = +25°C
2
±30
HARMONIC DISTORTION vs FREQUENCY
20
6
4
±25
FULL POWER RESPONSE
+VS = ±28V
10
±20
Power Supply Voltage, VS (V)
+VS = ±34V
40
±15
Case Temperature (°C)
60
Output Voltage Swing (Vp-p)
1k
Frequency (Hz)
VO = 40Vp-p
AV = +10
VS = ±28V
1.6
1.4
1.2
1.0
RL = 4 Ω
0.8
RL = 8 Ω
0.6
RL = 16Ω
0.4
RL = 50Ω
0.2
0
1
2
4
6
10
20
40
60
100
10
Frequency (kHz)
Frequency (kHz)
®
OPA501
102
4
103
104
TYPICAL PERFORMANCE CURVES (CONT)
Typical at +25°C case and ±VS = 28VDC, unless otherwise noted.
POWER DERATING CURVE
CURRENT LIMIT RESISTOR vs LIMIT CURRENT
0.28
Current Limit Resistor, RSC (Ω)
Internal Power Dissipation, PD (W)
120
100
80
θJC = 2.2°C/W
60
40
20
0
0.24
TC = +25°C
0.20
0.16
0.12
0.08
0.04
0
0
25
50
75
100
125
150
0
2
4
Case Temperature (°C)
±6
1.0
Normalized (θ JC)
1.2
RSC = 0.12Ω
±4
RSC = 0.28Ω
±2
10
12
14
0.8
0.6
0.4
0.2
±1
0
–50
0
–25
0
25
50
75
100
125
0.1
1
10
100
1k
10k
Frequency (Hz)
Case Temperature (°C)
PULSE RESPONSE, AV = +1
PULSE RESPONSE, AV = +1
Input/Output Voltage (5V/div)
Input/Output Voltage (5V/div)
Short Circuit Current (A)
±7
±3
8
NORMALIZED THERMAL RESISTANCE
vs FREQUENCY
CURRENT LIMIT vs TEMPERATURE
±5
6
Limit Current (A)
Time (10µs/div)
Time (100µs/div)
®
5
OPA501
APPLICATIONS INFORMATION
Figure 2, shows the permissible range of voltage and current. SOA is reduced at high operating temperature—see
Figure 3.
Grounding techniques can greatly affect the performance of
a power op amp. Figure 1 shows grounds connected so that
load current does not flow through signal ground connections. Power supply and load connections should be physically separated from the amplifier input and signal connections.
The safe output current decreases as VCE increases. Output
short-circuits are very demanding. A short-circuit to ground
forces the full power supply voltage (positive or negative
side) across the conducting transistor. With VS = ±30V, the
current limit must be set for 2A to be safe for short-circuit
to ground. For further information on SOA and evaluating
signal and load conditions, consult Applications Bulletin
AB-039.
Power supply connections to the amplifier should be bypassed with 10µF tantalum capacitors connected close to the
device pins. The capacitors should be connected to load
ground as shown.
HEAT SINKING
Most applications require a heat sink to assure that the
maximum junction temperature of 200°C is not exceeded.
The size of the heat sink required depends on the power
dissipated by the amplifier and ambient temperature conditions. Application Bulletin AB-039 explains how to find
maximum power dissipation for DC, AC, reactive loads, and
other conditions. Applications Bulletin AB-038 shows how
to determine heat sink requirements.
R2
(1)
+
+
RSC
G=1+
R2
R1
OPA501
(1)
VIN
R1
–
RSC
+
Load
The case of the OPA501 is isolated from all circuitry and can
be fastened directly to a heat sink. This eliminates cumbersome insulating hardware that degrades thermal performance. See Applications Bulletin AB-037 for information
on mounting techniques and procedures.
NOTE: (1) 10µF Tantalum.
V–
V+
10
8
6
4
FIGURE 1. Basic Circuit Connections.
R SC =
Output Current (A)
CURRENT LIMITS
The OPA501 has independent positive and negative current
limit circuits. Current limits are set by the value of R+SC and
R–SC. The approximate value of these resistors is:
0.65
− 0. 0437Ω
I LIMIT
1ms
0.5ms
Maximum
Specified
Current
2
1.0
0.8
0.6
Power
Dissipation
Limit
Second
Breakdown
Limit
TCASE = +25°C
TJUNCTION = +200°C
θJC = 2.2°C/W
0.4
Maximum RM, AM
Specified
Voltage
SM, BM
0.2
ILIMIT is the desired maximum current at room temperature in
Amperes and RSC is in ohms. The current limit value decreases with increasing temperature—see typical performance curves. The current limit resistors conduct the full
amplifier output current. Power dissipation of the current
limit resistors at maximum current is:
5ms
DC
0.1
1
2
4
6
8 10
20
40
60 80100
Voltage Across Output Transistor (V)
FIGURE 2. Transistor Safe Operating Area at +25°C Case
Temperature.
P MAX = (I LIMIT )2 R SC
10
8
6
4
Output Current (A)
The current limit resistors can be chosen from a variety of
types. Most wire-wound types are satisfactory, although
some physically large resistors may have excessive inductance which can cause instability.
SAFE OPERATING AREA
Stress on the output transistor is determined by the output
current and the voltage across the conducting output transistor. The power dissipated by the output transistor is equal to
the product of the output current and the voltage across the
conducting transistor, VCE. The Safe Operating Area (SOA),
2
0.5ms
5ms
Maximum
Specified
Current
1ms
DC
1.0
0.8
TCASE = +125°C
TJUNCTION = +200°C
0.6 θ = 2.2°C/W
JC
Maximum RM, AM
0.4
Specified
0.2
Voltage
SM, BM
0.1
1
2
4
6 8 10
20
40
60 80100
Voltage Across Output Transistor (V)
FIGURE 3. Transistor Safe Operating Area at +125°C Case
Temperature.
®
OPA501
6
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