LM12CL PDF даташит
Спецификация LM12CL изготовлена «National Semiconductor» и имеет функцию, называемую «80W Operational Amplifier». |
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Детали детали
Номер произв | LM12CL |
Описание | 80W Operational Amplifier |
Производители | National Semiconductor |
логотип |
14 Pages
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May 1999
LM12CL
80W Operational Amplifier
General Description
The LM12 is a power op amp capable of driving ±25V at
±10A while operating from ±30V supplies. The monolithic IC
can deliver 80W of sine wave power into a 4Ω load with
0.01% distortion. Power bandwidth is 60 kHz. Further, a
peak dissipation capability of 800W allows it to handle reac-
tive loads such as transducers, actuators or small motors
without derating. Important features include:
• input protection
• controlled turn on
• thermal limiting
• overvoltage shutdown
• output-current limiting
• dynamic safe-area protection
The IC delivers ±10A output current at any output voltage
yet is completely protected against overloads, including
shorts to the supplies. The dynamic safe-area protection is
provided by instantaneous peak-temperature limiting within
the power transistor array.
The turn-on characteristics are controlled by keeping the
output open-circuited until the total supply voltage reaches
14V. The output is also opened as the case temperature ex-
ceeds 150˚C or as the supply voltage approaches the
BVCEO of the output transistors. The IC withstands overvolt-
ages to 80V.
This monolithic op amp is compensated for unity-gain feed-
back, with a small-signal bandwidth of 700 kHz. Slew rate is
9V/µs, even as a follower. Distortion and capacitive-load sta-
bility rival that of the best designs using complementary out-
put transistors. Further, the IC withstands large differential
input voltages and is well behaved should the
common-mode range be exceeded.
The LM12 establishes that monolithic ICs can deliver consid-
erable output power without resorting to complex switching
schemes. Devices can be paralleled or bridged for even
greater output capability. Applications include operational
power supplies, high-voltage regulators, high-quality audio
amplifiers, tape-head positioners, x-y plotters or other
servo-control systems.
The LM12 is supplied in a four-lead, TO-3 package with V−
on the case. A gold-eutectic die-attach to a molybdenum in-
terface is used to avoid thermal fatigue problems. The LM12
is specified for either military or commercial temperature
range.
Connection Diagram
Typical Application*
DS008704-1
4-pin glass epoxy TO-3
socket is available from
AUGAT INC.
Part number 8112-AG7
Bottom View
Order Number LM12CLK
See NS Package Number K04A
*Low distortion (0.01%) audio amplifier
DS008704-2
© 1999 National Semiconductor Corporation DS008704
www.national.com
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Total Supply Voltage (Note 1)
Input Voltage
Output Current
Junction Temperature
80V
(Note 2)
Internally Limited
(Note 3)
Storage Temperature Range
Lead Temperature
(Soldering, 10 seconds)
Operating Ratings
Total Supply Voltage
Case Temperature (Note 4)
−65˚C to 150˚C
300˚C
15V to 60V
0˚C to 70˚C
Electrical Characteristics (Note 4)
Parameter
Conditions
Typ LM12CL
Units
25˚C
Limits
Input Offset Voltage
Input Bias Current
Input Offset Current
Common Mode
Rejection
±10V ≤ VS ≤ ±0.5 VMAX, VCM = 0
V− + 4V ≤ VCM ≤ V+ −2V
V− +4V ≤ VCM ≤ V+ −2V
V− +4V ≤ VCM ≤ V+ −2V
2
0.15
0.03
86
15/20
0.7/1.0
0.2/0.3
70/65
mV (max)
µA (max)
µA (max)
dB (min)
Power Supply
Rejection
Output Saturation
Threshold
V+ = 0.5 VMAX,
−6V ≥ V− ≥ −0.5 VMAX
V− = −0.5 VMAX,
6V ≤ V+ ≤ 0.5 VMAX
tON = 1 ms,
∆VIN = 5 (10 ) mV,
IOUT = 1A
8A
90 70/65
110 75/70
1.8 2.2/2.5
4 5/7
dB (min)
dB (min)
V (max)
V (max)
10A 5 V (max)
Large Signal Voltage
Gain
Thermal Gradient
Feedback
tON = 2 ms,
VSAT = 2V, IOUT = 0
VSAT = 8V, RL = 4Ω
PDISS = 50W, tON = 65 ms
100
30/20
V/mV (min)
50
15/10
V/mV (min)
30 100 µV/W (max)
Output-Current Limit
tON = 10 ms, VDISS = 10V
tON = 100 ms, VDISS = 58V
13 16
1.5 0.9/0.6
1.5 1.7
A (max)
A (min)
A (max)
Power Dissipation
Rating
DC Thermal Resistance
AC Thermal Resistance
tON = 100 ms, VDISS = 20V
VDISS = 58V
(Note 5) VDISS = 20V
VDISS = 58V
(Note 5)
100 80/55
W (min)
80 52/35
W (min)
2.3 2.9 ˚C/W (max)
2.7 4.5 ˚C/W (max)
1.6 2.1 ˚C/W (max)
Supply Current
VOUT = 0, IOUT = 0
60 120/140 mA (max)
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. The maximum voltage for which the LM12 is guaranteed to operate
is given in the operating ratings and in Note 4. With inductive loads or output shorts, other restrictions described in applications section apply.
Note 2: Neither input should exceed the supply voltage by more than 50 volts nor should the voltage between one input and any other terminal exceed 60 volts.
Note 3: Operating junction temperature is internally limited near 225˚C within the power transistor and 160˚C for the control circuitry.
Note 4: The supply voltage is ±30V (VMAX = 60V), unless otherwise specified. The voltage across the conducting output transistor (supply to output) is VDISS and
internal power dissipation is PDISS. Temperature range is 0˚C ≤ TC ≤ 70˚C where TC is the case temperature. Standard typeface indicates limits at 25˚C while bold-
face type refers to limits or special conditions over full temperature range. With no heat sink, the package will heat at a rate of 35˚C/sec per 100W of internal
dissipation.
Note 5: This thermal resistance is based upon a peak temperature of 200˚C in the center of the power transistor and a case temperature of 25˚C measured at the
center of the package bottom. The maximum junction temperature of the control circuitry can be estimated based upon a dc thermal resistance of 0.9˚C/W or an ac
thermal resistance of 0.6˚C/W for any operating voltage.
Although the output and supply leads are resistant to electrostatic discharges from handling, the input leads are not.
The part should be treated accordingly.
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Output-Transistor Ratings (guaranteed)
Safe Area
DC Thermal Resistance
Pulse Thermal Resistance
DS008704-31
Typical Performance Characteristics
Pulse Power Limit
Pulse Power Limit
DS008704-32
DS008704-33
Peak Output Current
DS008704-34
Output Saturation Voltage
DS008704-35
Large Signal Response
DS008704-36
Follower Pulse Response
Large Signal Gain
DS008704-37
Thermal Response
DS008704-38
DS008704-39
Total Harmonic Distortion
DS008704-40
DS008704-41
3
DS008704-42
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