LM4780TA National Semiconductor, LM4780TA Datasheet - Page 9

• Manufacturer Part Number: LM4780TA
• Description: Audio Power Amplifier IC
• Manufacturer: National Semiconductor

Specifications of LM4780TA

• Amplifier Case Style: TO-220
• Peak Reflow Compatible (260 C): No
• Termination Type: Through Hole
• Leaded Process Compatible: No
• Package / Case: 27-TO-220
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono/2-Channel Stereo
• Output Power (typ): 120x1/60x2@8OhmW
• Audio Amplifier Function: Speaker
• Input Offset Voltage: 10mV
• Input Bias Current: 1uA
• Total Harmonic Distortion: 0.03@4Ohm@30W%
• Single Supply Voltage (typ): 18V
• Dual Supply Voltage (typ): ±12/±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): 20V
• Single Supply Voltage (max): 84V
• Dual Supply Voltage (min): ±10V
• Dual Supply Voltage (max): ±42V
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 27 +Tab
• Package Type: TO-220
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Optional External Component
Interaction
The optional external components have specific desired func-
tions. Their values are chosen to reduce the bandwidth and
eliminate unwanted high frequency oscillation. They may,
however, cause certain undesirable effects when they inter-
act. Interaction may occur when the components produce
reactions that are nearly equal to one another. One example
Typical Performance Characteristics
± 25V, P
± 35V, P
THD+N vs Frequency
THD+N vs Frequency
R
R
OUT
OUT
L
L
= 4Ω, 80kHz BW
= 8Ω, 80kHz BW
= 1W & 30W/Channel
= 1W & 30W/Channel
200586e3
200586e5
9
is the coupling capacitor, C
tor, C
frequencies. They may couple signals from the input to the
output. Please take careful note of basic amplifier component
functionality when selecting the value of these components
and their placement on a printed circuit board (PCB).
The optional external components shown in
Figure
and split supply voltage configurations.
f
. These two components are low impedances at certain
5, and described above, are applicable in both single
THD+N vs Output Power/Channel
± 30V, P
± 25V, R
THD+N vs Frequency
R
OUT
L
= 6Ω, 80kHz BW
= 1W & 30W/Channel
L
= 4Ω, 80kHz BW
C
, and the compensation capaci-
Figure 4
www.national.com
200586e8
200586e4
and