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LM4780 Datasheet(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4780
Description  Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute
PDF  24 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4780 Datasheet(HTML) 9 Page - National Semiconductor (TI)

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OPTIONAL EXTERNAL
COMPONENT INTERACTION
The optional external components have specific desired
functions. Their values are chosen to reduce the bandwidth
and eliminate unwanted high frequency oscillation. They
may, however, cause certain undesirable effects when they
interact. Interaction may occur when the components pro-
duce reactions that are nearly equal to one another. One
example is the coupling capacitor, C
C, and the compensa-
tion capacitor, C
f. These two components are low imped-
ances at certain 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 4 and
Figure 5, and described above, are applicable in both single
and split supply voltage configurations.
Typical Performance Characteristics
THD+N vs Frequency
± 25V, P
OUT = 1W & 30W/Channel
R
L=4
Ω, 80kHz BW
THD+N vs Frequency
± 30V, P
OUT = 1W & 30W/Channel
R
L=6
Ω, 80kHz BW
200586E3
200586E4
THD+N vs Frequency
± 35V, P
OUT = 1W & 30W/Channel
R
L=8
Ω, 80kHz BW
THD+N vs Output Power/Channel
± 25V, R
L=4
Ω, 80kHz BW
200586E5
200586E8
www.national.com
9



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