Features: ·40W continuous average output power into 8W
·75W instantaneous peak output power capability
·Signal-to-Noise Ratio ³ 95 dB(min)
·An input mute function
·Output protection from a short to ground or to the supplies via internal current limiting circuitry
·Output over-voltage protection against transients from inductive loads
·Supply under-voltage protection, not allowing internal biasing to occur when |VEE| + |VCC| £ 12V, thus eliminating
turn-on and turn-off transients
·11-lead TO-220 packageApplication·Component stereo
·Compact stereo
·Self-powered speakers
·Surround-sound amplifiers
·High-end stereo TVsPinout
Specifications
| Power@ 8Ohms, 1% THD |
45 Watt |
| Power@ 8Ohms, 10% THD |
50 Watt |
| THD |
0.06 % |
| PSRR |
125 dB |
| SNR |
98 dB |
| Channels |
1 Channels |
| THD Conditions |
Po=25W @ Vs=±30V |
| PSRR Conditions |
V+=30V to 10V, V-=-30V |
| SNR Conditions |
Po=1W, Rs=25 Ohms |
| User Supply |
30 Volt |
| Supply Range |
+20 - +60V |
| Mute/Shutdown |
Mute |
| Mono/Stereo |
Mono |
| Gain Bandwidth |
8 MHz |
| Slew Rate |
9 Volts/usec |
| Temperature Min |
-20 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
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)..................... 72V
Supply Voltage |V+|+|V−| (Input Signal)................. 70V
Common Mode Input Voltage................. (V+ or V−) and
...............V+| + |V−| 60V
Differential Input Voltage......................................... 60V
Output Current................................... Internally Limited
Power Dissipation (Note 6).................................... 125W
ESD Susceptibility (Note 7) ...................................3000V
Junction Temperature (Note 8)........................... 150°C
Soldering Information
T Package (10 seconds) ......................................260°C
Storage Temperature .......................−40°C to +150°C
Thermal Resistance
JC..................................................................... 1°C/W
JA ...................................................................43°C/WDescriptionThe LM2876 is a high-performance audio power amplifier capable of delivering 40W of continuous average power to an 8 load with 0.1% THD+N from 20Hz-20kHz.
The performance of the LM2876, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, 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%.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM2876T |
HV700 |
0 |
13580 |
0 |
0 |
1222500 |
3 |
346887713 |
| LM2876TF |
HV700 |
0 |
13580 |
0 |
0 |
1222500 |
3 |
346887713 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-147: AN-147 Low Cost IC Stereo Receiver |
140 Kbytes |
4-Oct-04 |
Download |
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|
LM2876 Data Sheet
