LM1876TF PDF даташит
Спецификация LM1876TF изготовлена «National Semiconductor» и имеет функцию, называемую «Overturebb Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes». |
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Детали детали
Номер произв | LM1876TF |
Описание | Overturebb Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes |
Производители | National Semiconductor |
логотип |
16 Pages
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February 1998
LM1876 Overture™ Audio Power Amplifier Series
Dual 20W Audio Power Amplifier with Mute and Standby
Modes
General Description
The LM1876 is a stereo audio amplifier capable of delivering
typically 20W per channel of continuous average output
power into a 4Ω or 8Ω load with less than 0.1% (THD + N).
Each amplifier has an independent smooth transition fade-in/
out mute and a power conserving standby mode which can
be controlled by external logic.
The performance of the LM1876, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe™) Protection Cir-
cuitry, places it in a class above discrete and hybrid amplifi-
ers by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe Protection means that these
parts are safeguarded at the output against overvoltage, un-
dervoltage, overloads, including thermal runaway and in-
stantaneous temperature peaks.
Key Specifications
j THD+N at 1 kHz at 2 x 15W continuous average
output power into 4Ω or 8Ω:
0.1% (max)
j THD+N at 1 kHz at continuous average
output power of 2 x 20W into 8Ω:
0.009% (typ)
j Standby current:
4.2 mA (typ)
Features
n SPiKe Protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute mode
n Standby-mode
n Isolated 15-lead TO-220 package
n Non-Isolated 15-lead TO-220 package
Applications
n High-end stereo TVs
n Component stereo
n Compact stereo
Typical Application
Connection Diagram
Plastic Package
DS012072-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Note: Numbers in parentheses represent pinout for amplifier B.
*Optional component dependent upon specific design requirements.
SPiKe™ Protection and Overture™ are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012072
DS012072-2
Top View
Isolated Package
Order Number LM1876TF
See NS Package Number TF15B
Non-Isolated Package
Order Number LM1876T
See NS Package Number TA15A
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Absolute Maximum Ratings (Notes 4, 5)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage |VCC| + |VEE|
(No Input)
Supply Voltage |VCC| + |VEE|
(with Input)
Common Mode Input Voltage
Differential Input Voltage
Output Current
Power Dissipation (Note 6)
ESD Susceptability (Note 7)
Junction Temperature (Note 8)
64V
64V
(VCC or VEE) and
|VCC| + |VEE| ≤ 54V
54V
Internally Limited
62.5W
2000V
150˚C
Thermal Resistance
Isolated TF-Package
θJC
Non-Isolated T-Package
θJC
Soldering Information
TF Package (10 sec.)
Storage Temperature
2˚C/W
1˚C/W
260˚C
−40˚C to +150˚C
Operating Ratings (Notes 4, 5)
Temperature Range
TMIN ≤ TA ≤ TMAX
Supply Voltage |VCC| + |VEE| (Note 1)
−20˚C ≤ TA ≤ +85˚C
20V to 64V
Electrical Characteristics (Notes 4, 5)
The following specifications apply for VCC = +22V, VEE = −22V with RL = 8Ω unless otherwise specified. Limits apply for TA =
25˚C.
Symbol
Parameter
Conditions
LM1876
Typical
Limit
Units
(Limits)
(Note 9) (Note 10)
|VCC| +
|VEE|
PO
(Note 3)
Power Supply Voltage
(Note 11)
Output Power
(Continuous Average)
THD + N Total Harmonic Distortion
Plus Noise
Xtalk
SR
(Note 3)
Itotal
(Note 2)
Channel Separation
Slew Rate
Total Quiescent Power
Supply Current
GND − VEE ≥ 9V
THD + N = 0.1% (max),
f = 1 kHz
|VCC| = |VEE| = 22V, RL = 8Ω
|VCC| = |VEE| = 20V, RL = 4Ω (Note 13)
15 W/ch, RL = 8Ω
15 W/ch, RL = 4Ω, |VCC| = |VEE| = 20V
20 Hz ≤ f ≤ 20 kHz, AV = 26 dB
f = 1 kHz, VO = 10.9 Vrms
VIN = 1.414 Vrms, trise = 2 ns
Both Amplifiers VCM = 0V,
VO = 0V, IO = 0 mA
Standby: Off
20
22
0.08
0.1
80
18
50
20 V (min)
64 V (max)
15 W/ch (min)
15 W/ch (min)
%
%
dB
12 V/µs (min)
80 mA (max)
VOS
(Note 2)
IB
IOS
IO
VOD
(Note 2)
PSRR
(Note 2)
CMRR
(Note 2)
Input Offset Voltage
Standby: On
VCM = 0V, IO = 0 mA
4.2
2.0
Input Bias Current
Input Offset Current
Output Current Limit
Output Dropout Voltage
(Note 12)
Power Supply Rejection Ratio
Common Mode Rejection Ratio
VCM = 0V, IO = 0 mA
VCM = 0V, IO = 0 mA
|VCC| = |VEE| = 10V, tON = 10 ms,
VO = 0V
|VCC–VO|, VCC = 20V, IO = +100 mA
|VO–VEE|, VEE = −20V, IO = −100 mA
VCC = 25V to 10V, VEE = −25V,
VCM = 0V, IO = 0 mA
VCC = 25V, VEE = −25V to −10V
VCM = 0V, IO = 0 mA
VCC = 35V to 10V, VEE = −10V to −35V,
VCM = 10V to −10V, IO = 0 mA
0.2
0.002
3.5
1.8
2.5
115
110
110
6
15
0.5
0.2
2.9
2.3
3.2
85
85
80
mA (max)
mV (max)
µA (max)
µA (max)
Apk (min)
V (max)
V (max)
dB (min)
dB (min)
dB (min)
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Electrical Characteristics (Notes 4, 5) (Continued)
The following specifications apply for VCC = +22V, VEE = −22V with RL = 8Ω unless otherwise specified. Limits apply for TA =
25˚C.
Symbol
Parameter
Conditions
LM1876
Typical
Limit
Units
(Limits)
AVOL
(Note 2)
GBWP
eIN
(Note 3)
SNR
Open Loop Voltage Gain
Gain Bandwidth Product
Input Noise
Signal-to-Noise Ratio
AM
Standby
Pin
Mute Attenuation
RL = 2 kΩ, ∆ VO = 20 V
fO = 100 kHz, VIN = 50 mVrms
IHF — A Weighting Filter
RIN = 600Ω (Input Referred)
PO = 1W, A — Weighted,
Measured at 1 kHz, RS = 25Ω
PO = 15W, A — Weighted
Measured at 1 kHz, RS = 25Ω
Pin 6,11 at 2.5V
(Note 9) (Note 10)
110 90
7.5 5
2.0 8
dB (min)
MHz (min)
µV (max)
98 dB
108 dB
115 80 dB (min)
VIL
VIH
Mute pin
Standby Low Input Voltage
Standby High Input Voltage
Not in Standby Mode
In Standby Mode
0.8 V (max)
2.0 2.5
V (min)
VIL Mute Low Input Voltage
VIH Mute High Input Voltage
Outputs Not Muted
Outputs Muted
0.8 V (max)
2.0 2.5
V (min)
Note 1: Operation is guaranteed up to 64V, however, distortion may be introduced from SPiKe Protection Circuitry if proper thermal considerations are not taken into
account. Refer to the Application Information section for a complete explanation.
Note 2: DC Electrical Test; Refer to Test Circuit #1.
Note 3: AC Electrical Test; Refer to Test Circuit #2.
Note 4: All voltages are measured with respect to the GND pins (5, 10), unless otherwise specified.
Note 5: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is
given, however, the typical value is a good indication of device performance.
Note 6: For operating at case temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance of
θJC = 2˚C/W (junction to case) for the TF package and θJC = 1˚C/W for the T package. Refer to the section Determining the Correct Heat Sink in the Application In-
formation section.
Note 7: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 8: The operating junction temperature maximum is 150˚C, however, the instantaneous Safe Operating Area temperature is 250˚C.
Note 9: Typicals are measured at 25˚C and represent the parametric norm.
Note 10: Limits are guarantees that all parts are tested in production to meet the stated values.
Note 11: VEE must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled. In addition, the voltage dif-
ferential between VCC and VEE must be greater than 14V.
Note 12: The output dropout voltage, VOD, is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical Per-
formance Characteristics section.
Note 13: For a 4Ω load, and with ±20V supplies, the LM1876 can deliver typically 22W of continuous average output power with less than 0.1% (THD + N). With
supplies above ±20V, the LM1876 cannot deliver more than 22W into a 4Ω due to current limiting of the output transistors. Thus, increasing the power supply above
±20V will only increase the internal power dissipation, not the possible output power. Increased power dissipation will require a larger heat sink as explained in the
Application Information section.
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Номер в каталоге | Описание | Производители |
LM1876T | Overturebb Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes | National Semiconductor |
LM1876TF | Overturebb Audio Power Amplifier Series Dual 20W Audio Power Amplifier with Mute and Standby Modes | National Semiconductor |
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