LM3876T National Semiconductor, LM3876T Datasheet - Page 4

• Manufacturer Part Number: LM3876T
• Description: 92F296
• Manufacturer: National Semiconductor

Specifications of LM3876T

• Operational Class: Class-B
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 56x1@8OhmW
• Audio Amplifier Function: Speaker
• Input Offset Voltage: 15@±35VmV
• Input Bias Current: 1uA
• Total Harmonic Distortion: 0.06@8Ohm@40W%
• Single Supply Voltage (typ): 18V
• Dual Supply Voltage (typ): ±15/±18/±24/±28V
• Power Supply Requirement: Single/Dual
• Power Dissipation: 125W
• Unity Gain Bandwidth Product (typ): 8MHz
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 120dB
• Single Supply Voltage (min): 24V
• Single Supply Voltage (max): 84V
• Dual Supply Voltage (min): ±12V
• Dual Supply Voltage (max): ±42V
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 11 +Tab
• Package Type: TO-220
• Amplifier Class: AB
• No. Of Channels: 1
• Output Power: 56W
• Supply Voltage Range: 24V To 84V
• Load Impedance: 8ohm
• Operating Temperature Range: -20°C To +85°C
• Amplifier Case Style: TO-220
• Rohs Compliant: No
• Lead Free Status / Rohs Status: Not Compliant

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GBWP
e
SNR
IMD
IN
Electrical Characteristics
Symbol
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 pin (pin 7), 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
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee 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 θ
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 guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 11: The LM3876T package TA11B is a non-isolated package, setting the tab of the device and the heat sink at V
mounted to the heat sink using only thermal compound. If a mica washer is used in addition to thermal compound, θ
will be isolated from V
Note 12: The feedback compensation network limits the bandwidth of the closed-loop response and so the slew rate will be reduced due to the high frequency
roll-off. Without feedback compensation, the slew rate is typically 16V/µs.
Note 13: V
Note 14: The output dropout voltage is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs Supply Voltage graph in the Typical
Performance Characteristics section.
The following specifications apply for V
apply for T
(Note 3) Input Noise
JC
= 1.0 ˚C/W (junction to case). Refer to the Thermal Resistance figure in the Application Information section under Thermal Considerations.
−
must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled.
Gain-Bandwidth Product
Signal-to-Noise Ratio
Intermodulation Distortion Test
A
= 25˚C.
−
.
Parameter
+
= +35V, V
(Notes 4, 5) (Continued)
−
|V
f
IHF — A Weighting Filter
R
P
Measured at 1 kHz, R
P
Measured at 1 kHz, R
Ppk= 100W, A-Weighted,
Measured at 1 kHz, R
60 Hz, 7 kHz, 4:1 (SMPTE)
60 Hz, 7 kHz, 1:1 (SMPTE)
O
O
O
= −35V, I
IN
+
= 100 kHz, V
| = |V
= 1W, A-Weighted,
= 40W, A-Weighted,
= 600Ω (Input Referred)
−
| = 40V
4
MUTE
Conditions
IN
= −0.5 mA with R
= 50 mVrms
S
S
S
= 25Ω
= 25Ω
= 25Ω
L
= 8Ω unless otherwise specified. Limits
CS
(case to sink) is increased, but the heat sink
−
potential when the LM3876 is directly
(Note 9) (Note 10)
Typical
0.004
0.006
114
122
2.0
98
8
LM3876
Limit
2
8
MHz (min)
µV (max)
(Limits)
Units
dB
dB
dB
%