Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

LM3875 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM3875
Descripción Electrónicos  OverturTM Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3875 Datasheet(HTML) 6 Page - National Semiconductor (TI)

Back Button LM3875 Datasheet HTML 2Page - National Semiconductor (TI) LM3875 Datasheet HTML 3Page - National Semiconductor (TI) LM3875 Datasheet HTML 4Page - National Semiconductor (TI) LM3875 Datasheet HTML 5Page - National Semiconductor (TI) LM3875 Datasheet HTML 6Page - National Semiconductor (TI) LM3875 Datasheet HTML 7Page - National Semiconductor (TI) LM3875 Datasheet HTML 8Page - National Semiconductor (TI) LM3875 Datasheet HTML 9Page - National Semiconductor (TI) LM3875 Datasheet HTML 10Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 20 page
background image
External Components Description
(Figure 1 and Figure 2)
Components
Functional Description
1.
R
IN
Acts as a volume control by setting the voltage level allowed to the amplifier’s input terminals.
2.
R
A
Provides DC voltage biasing for the single supply operation and bias current for the positive input terminal.
3.
C
A
Provides bias filtering.
4.
C
Provides AC coupling at the input and output of the amplifier for single supply operation.
5.
R
B
Prevents currents from entering the amplifier’s non-inverting input which may be passed through to the load
upon power-down of the system due to the low input impedance of the circuitry when the under-voltage
circuitry is off. This phenomenon occurs when the supply voltages are below 1.5V.
6.
*C
C
Reduces the gain (bandwidth of the amplifier) at high frequencies to avoid quasi-saturation oscillations of the
output transistor. The capacitor also suppresses external electromagnetic switching noise created from
fluorescent lamps.
7.
Ri
Inverting input resistance to provide AC Gain in conjunction with R
f1.
8.
*Ci
Feedback capacitor. Ensures unity gain at DC. Also a low frequency pole (highpass roll-off) at:
f
c = 1/(2
π Ri Ci).
9.
R
f1
Feedback resistance to provide AC Gain in conjunction with Ri.
10.
*R
f2
At higher frequencies feedback resistance works with C
f to provide lower AC Gain in conjunction with Rf1 and
Ri. A high frequency pole (lowpass roll-off) exists at:
f
c =[Rf1 Rf2](s+1/Rf2 Cf]/[(Rf1 +Rf2)(s+1/Cf (Rf1 +Rf2))].
11.
*C
f
Compensation capacitor that works with R
f1 and Rf2 to reduce the AC Gain at higher frequencies.
12.
*R
SN
Works with C
SN to stabilize the output stage by creating a pole that eliminates high frequency oscillations.
13.
*C
SN
Works with R
SN to stabilize the output stage by creating a pole that eliminates high frequency oscillations.
f
c
= 1/(2
πR
SN CSN).
14.
*L
Provides high impedance at high frequencies so that R may decouple a highly capacitive load and reduce the
Q of the series resonant circuit due to capacitive load. Also provides a low impedance at low frequencies to
short out R and pass audio signals to the load.
15.
*R
16.
C
S
Provides power supply filtering and bypassing.
*Optional components dependent upon specific design requirements. Refer to the Application Information section for more information.
OPTIONAL EXTERNAL COMPONENT INTERACTION
Although the optional external components have specific
desired functions that are designed to reduce the bandwidth
and eliminate unwanted high frequency oscillations they may
cause certain undesirable effects when they interact. Inter-
action may occur for components whose reactances are in
close proximity to one another. One example would be the
coupling capacitor, C
C, and the compensation capacitor, Cf.
These two components act as low impedances to certain
frequencies which will couple signals from the input to the
output. Please take careful note of basic amplifier compo-
nent functionality when designing in these components.
The optional external components shown in Figure 2 and
described above are applicable in both single and split volt-
age supply configurations.
www.national.com
6


Número de pieza similar - LM3875

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
LM3875 TI1-LM3875 Datasheet
835Kb / 29P
[Old version datasheet]   LM3875 Overture??Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier
LM3875TF/NOPB TI1-LM3875TF/NOPB Datasheet
835Kb / 29P
[Old version datasheet]   LM3875 Overture??Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier
More results

Descripción similar - LM3875

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
LM3875 TI1-LM3875 Datasheet
835Kb / 29P
[Old version datasheet]   LM3875 Overture??Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier
logo
National Semiconductor ...
LM3876 NSC-LM3876_00 Datasheet
1Mb / 22P
   Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute
logo
Texas Instruments
LM3876 TI1-LM3876 Datasheet
937Kb / 29P
[Old version datasheet]   LM3876 Overture??Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute
logo
National Semiconductor ...
LM3876 NSC-LM3876 Datasheet
566Kb / 19P
   LM3876 Overture??Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute
logo
Texas Instruments
LM2876 TI1-LM2876 Datasheet
870Kb / 28P
[Old version datasheet]   Audio Power Amplifier Series High-Performance 40W Audio Power Amplifier
logo
National Semiconductor ...
LM2876 NSC-LM2876 Datasheet
565Kb / 19P
   Overture??Audio Power Amplifier Series High-Performance 40W Audio Power Amplifier w/Mute
LM2876 NSC-LM2876_00 Datasheet
658Kb / 22P
   Overture Audio Power Amplifier Series High-Performance 40W Audio Power Amplifier w/Mute
logo
Texas Instruments
LM3886 TI1-LM3886 Datasheet
1Mb / 31P
[Old version datasheet]   LM3886 Overture Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute
logo
National Semiconductor ...
LM3886 NSC-LM3886_03 Datasheet
846Kb / 24P
   Overture TM Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute
LM3886 NSC-LM3886 Datasheet
745Kb / 20P
   Overture TM Audio Power Amplifier Series High-Performance 68W Audio Power Amplifier w/Mute
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com