LM2876T/NOPB National Semiconductor, LM2876T/NOPB Datasheet

IC AMP AUDIO PWR 40W AB TO220-11

LM2876T/NOPB

Manufacturer Part Number
LM2876T/NOPB
Description
IC AMP AUDIO PWR 40W AB TO220-11
Manufacturer
National Semiconductor
Series
Overture™r
Type
Class ABr
Datasheet

Specifications of LM2876T/NOPB

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
40W x1 @ 8 Ohm
Voltage - Supply
20 V ~ 60 V, ±10 V ~ 30 V
Features
Mute, Short-Circuit and Thermal Protection
Mounting Type
Through Hole
Package / Case
TO-220-11 (Bent and Staggered Leads)
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono
Output Power (typ)
40x1@8OhmW
Audio Amplifier Function
Speaker
Input Offset Voltage
10@±30VmV
Input Bias Current
1uA
Total Harmonic Distortion
0.06@8Ohm@25W%
Single Supply Voltage (typ)
18V
Dual Supply Voltage (typ)
±12/±15/±18/±24V
Power Supply Requirement
Single/Dual
Power Dissipation
125W
Unity Gain Bandwidth Product (typ)
8MHz
Rail/rail I/o Type
No
Power Supply Rejection Ratio
125dB
Single Supply Voltage (min)
20V
Single Supply Voltage (max)
60V
Dual Supply Voltage (min)
±10V
Dual Supply Voltage (max)
±30V
Operating Temp Range
-20C to 85C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
11 +Tab
Package Type
TO-220
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM2876T
*LM2876T/NOPB
LM2876T
© 2004 National Semiconductor Corporation
LM2876
Overture
High-Performance 40W Audio Power Amplifier w/Mute
General Description
The LM2876 is a high-performance audio power amplifier
capable of delivering 40W of continuous average power to
an 8Ω load with 0.1% THD+N from 20Hz–20kHz.
The performance of the LM2876, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe
cuitry, puts it in a class above discrete and hybrid amplifiers
by providing an inherently, dynamically protected Safe Op-
erating Area (SOA). SPiKe protection means that these
parts are completely safeguarded at the output against ov-
ervoltage, undervoltage, overloads, including shorts to the
supplies, thermal runaway, and instantaneous temperature
peaks.
The LM2876 maintains an excellent signal-to-noise ratio of
greater than 95dB (min) with a typical low noise floor of
2.0µV. It exhibits extremely low THD+N values of 0.06% at
the rated output into the rated load over the audio spectrum,
and provides excellent linearity with an IMD (SMPTE) typical
rating of 0.004%.
Typical Application
* Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional
description.
Overture
and SPiKe
Protection are trademarks of National Semiconductor Corporation.
Audio Power Amplifier Series
FIGURE 1. Typical Audio Amplifier Application Circuit
DS011775
) protection cir-
Features
n 40W continuous average output power into 8Ω
n 75W instantaneous peak output power capability
n Signal-to-Noise Ratio ≥ 95 dB(min)
n An input mute function
n Output protection from a short to ground or to the
n Output over-voltage protection against transients from
n Supply under-voltage protection, not allowing internal
n 11-lead TO-220 package
n Wide supply range 20V - 72V
Applications
n Component stereo
n Compact stereo
n Self-powered speakers
n Surround-sound amplifiers
n High-end stereo TVs
supplies via internal current limiting circuitry
inductive loads
biasing to occur when |V
eliminating turn-on and turn-off transients
01177501
EE
| + |V
CC
| ≤ 12V, thus
www.national.com
August 2000

Related parts for LM2876T/NOPB

LM2876T/NOPB Summary of contents

Page 1

... FIGURE 1. Typical Audio Amplifier Application Circuit Overture ™ and SPiKe ™ Protection are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Features n 40W continuous average output power into 8Ω n 75W instantaneous peak output power capability n Signal-to-Noise Ratio ≥ 95 dB(min input mute function ™ ...

Page 2

Connection Diagram + † Connect Pin for Compatibility with LM3886. *Preliminary: Call your local National sales rep. or distributor for availability. Top View Order Number LM2876Tor LM2876TFSee NS Package Number TA11B forStaggered Lead Non-IsolatedPackage or TF11B* forStaggered ...

Page 3

... Absolute Maximum Ratings 5) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. + − Supply Voltage |V |+|V | (No Signal) + − Supply Voltage |V |+|V | (Input Signal) Common Mode Input Voltage Differential Input Voltage Output Current ...

Page 4

Electrical Characteristics The following specifications apply for V apply for T = 25˚C. A Symbol Parameter GBWP Gain-Bandwidth Product eIN Input Noise (Note 3) SNR Signal-to-Noise Ratio IMD Intermodulation Distortion Test Note 2: DC Electrical Test; refer to Test Circuit ...

Page 5

Test Circuit #2 (AC Electrical Test Circuit) Single Supply Application Circuit *Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional description. FIGURE 2. Typical Single Supply Audio Amplifier Application Circuit 01177504 ...

Page 6

Equivalent Schematic www.national.com (excluding active protection circuitry) 6 01177506 ...

Page 7

External Components Description (Figures 1, 2) Components 1. R Acts as a volume control by setting the voltage level allowed to the amplifier’s input terminals Provides DC voltage biasing for the single supply operation and bias current ...

Page 8

Typical Performance Characteristics Safe Area Supply Current vs Supply Voltage Pulse Thermal Resistance www.national.com 01177517 01177519 01177521 8 SPiKe Protection Response 01177518 Pulse Thermal Resistance 01177520 Supply Current vs Output Voltage 01177522 ...

Page 9

Typical Performance Characteristics Pulse Power Limit Supply Current vs Case Temperature Input Bias Current vs Case Temperature (Continued) 01177523 01177525 01177527 9 Pulse Power Limit 01177524 Pulse Response 01177526 Clipping Voltage vs Supply Voltage 01177528 www.national.com ...

Page 10

Typical Performance Characteristics THD + N vs Frequency THD + N vs Output Power THD + N Distribution www.national.com (Continued) 01177529 01177531 01177533 10 THD + N vs Output Power 01177530 THD + N Distribution 01177532 Output Power vs Load ...

Page 11

Typical Performance Characteristics Maximum Power Dissipation vs Supply Voltage Note: The maximum heat sink thermal resistance values, ø Power Dissipation vs Output Power Output Power vs Supply Voltage (Continued) Max Heatsink Thermal Resistance (˚C/W) at the Specified Ambient Temperature (˚C) ...

Page 12

Typical Performance Characteristics IMD 60 Hz, 7 kHz, 4:1 IMD 60 Hz, 1:1 IMD 60 Hz, 7 kHz, 1:1 www.national.com (Continued) IMD 60 Hz, 7 kHz, 4:1 01177539 IMD 60 Hz, 7 kHz 1:1 01177541 01177543 12 01177540 01177542 Mute ...

Page 13

Typical Performance Characteristics Mute Attenuation vs Mute Current Power Supply Rejection Ratio Open Loop Frequency Response (Continued) Large Signal Response 01177545 01177547 01177549 13 01177546 Common-Mode Rejection Ratio 01177548 www.national.com ...

Page 14

... These parameters are in addition to knowing the maximum junction temperature and the thermal resistance of the IC, both of which are provided by National Semiconductor benefit to the system designer we have provided Maxi- mum Power Dissipation vs Supply Voltages curves for vari- ...

Page 15

Application Information mal compound on both faces. Two-mil mica washers are most common, giving about 0.4˚C/W interface resistance with the compound. Silicone-rubber washers are also available. A 0.5˚C/W ther- mal resistance is claimed without thermal compound. Expe- rience has shown ...

Page 16

Application Information human ear’s sensitivity to the frequency spectra. The weight- ing filters at the same time provide the bandwidth limiting as discussed in the previous paragraph. Note 16: CCIR/ARM: A Practical Noise Measurement Method; by Ray Dolby, David Robinson ...

Page 17

Application Information The load current I will be much larger than input bias current thus V will follow the output voltage directly, i.e. in phase Therefore the voltage appearing at the non-inverting input is effectively ...

Page 18

Application Information spond quickly enough to nonlinearities. This decreased abil- ity to respond to nonlinearities increases the THD + N speci- fication. The desired input impedance is set by R can cause board layout problems and DC offsets at the ...

Page 19

Definition of Terms (Continued) Peak Power: Most commonly referred to as the power out- put capability of an amplifier that can be delivered to the load; specified by the part’s maximum voltage swing. Headroom: The margin between an actual signal ...

Page 20

Definition of Terms (Continued) www.national.com 01177516 20 ...

Page 21

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM2876T NS Package Number TA11B Order Number LM2876TF NS Package Number TF11B 21 www.national.com ...

Page 22

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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