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PDF LM3886T Data sheet ( Hoja de datos )
| Número de pieza | LM3886T | |
| Descripción | LM3886 Overture Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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May 1999
LM3886 Overture™ Audio Power Amplifier Series
High-Performance 68W Audio Power Amplifier w/Mute
General Description
The LM3886 is a high-performance audio power amplifier
capable of delivering 68W of continuous average power to a
4Ω load and 38W into 8Ω with 0.1% (THD + N) from
20 Hz–20 kHz.
The performance of the LM3886, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe™) Protection Cir-
cuitry, puts it in a class above discrete and hybrid amplifiers
by providing an inherently, dynamically protected Safe Oper-
ating Area (SOA). SPiKe Protection means that these parts
are completely safeguarded at the output against overvolt-
age, undervoltage, overloads, including shorts to the sup-
plies, thermal runaway, and instantaneous temperature
peaks.
The LM3886 maintains an excellent Signal-to-Noise Ratio of
greater than 92 dB with a typical low noise floor of 2.0 µV. It
exhibits extremely low (THD + N) values of 0.03% at the
rated output into the rated load over the audio spectrum, and
provides excellent linearity with an IMD (SMPTE) typical rat-
ing of 0.004%.
Features
n 68W cont. avg. output power into 4Ω at VCC = ±28V
n 38W cont. avg. output power into 8Ω at VCC = ±28V
n 50W cont. avg. output power into 8Ω at VCC = ±35V
n 135W instantaneous peak output power capability
n Signal-to-Noise Ratio ≥ 92 dB
n An input mute function
n Output protection from a short to ground or to the
supplies via internal current limiting circuitry
n Output over-voltage protection against transients from
inductive loads
n Supply under-voltage protection, not allowing internal
biasing to occur when |VEE| + |VCC| ≤ 12V, thus
eliminating turn-on and turn-off transients
n 11-lead TO-220 package
Applications
n Component stereo
n Compact stereo
n Self-powered speakers
n Surround-sound amplifiers
n High-end stereo TVs
Typical Application
DS011833-1
*Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional
description.
FIGURE 1. Typical Audio Amplifier Application Circuit
Overture™ and SPiKe ™ Protection are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS011833
www.national.com
1 page  
Test Circuit #2 (AC Electrical Test Circuit)
Single Supply Application Circuit
DS011833-4
DS011833-5
*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
5 www.national.com
5 Page 
Typical Performance Characteristics (Continued)
Max Heatsink Thermal Resistance (˚C/W)
at the Specified Ambient Temperature (˚C)
Maximum Power Dissipation vs Supply Voltage
DS011833-9
Note: The maximum heat sink thermal resistance values, øSA, in the table above were calculated using a øCS = 0.2˚C/W due to thermal compound.
Power Dissipation
vs Output Power
Power Dissipation
vs Output Power
Output Power
vs Supply Voltage
IMD 60 Hz, 4:1
DS011833-47
DS011833-48
IMD 60 Hz, 7 kHz, 4:1
DS011833-49
IMD 60 Hz, 7 kHz, 4:1
DS011833-50
DS011833-51
DS011833-52
11 www.national.com
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Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM3886 | High-Performance 68W Audio Power Amplifier w/Mute | National Semiconductor |
| LM3886 | LM3886 Overture Audio Pwr Amp Series High-Perf 68W Audio Pwr Amp w/Mute (Rev. C) |  Texas Instruments |
| LM3886T | LM3886 Overture Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute | National Semiconductor |
| LM3886TF | LM3886 Overture Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute | National Semiconductor |
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