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PDF LM2005 Data sheet ( Hoja de datos )
| Número de pieza | LM2005 | |
| Descripción | LM2005 20 Watt Automotive Power Amplifier | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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April 1989
LM2005 20 Watt Automotive Power Amplifier
General Description
The LM2005 is a dual high power amplifier designed to
deliver optimum performance and reliability for automotive
applications High current capability (3 5A) enables the de-
vice to deliver 10W channel into 2X (LM2005T-S) or 20W
bridged monaural (LM2005T-M) into 4X with low distortion
Features
Y Wide supply range (8V – 18V)
Y Externally programmable gain
Y With or without bootstrap
Y Low distortion
Y Low noise
Y High peak current capability
Y POe20W bridge
Y High voltage protection
Y AC and DC output short circuit protection to ground or
across load
Y Thermal protection
Y Inductive load protection
Y Accidental open ground protection
Y Immunity to 40V power supply transients
Y 3 C W device dissipation
Y Pin for pin compatible with TDA2005
Connection Diagram Typical Application
Plastic Package
TL H 5129–1
Order Number LM2005T-S
or LM2005T-M
See NS Package Number TA11A
TL H 5129 – 2
FIGURE 1 20W Bridge Amplifier Application and Test Circuit
C1995 National Semiconductor Corporation TL H 5129
RRD-B30M115 Printed in U S A
1 page  
External Components (Figure 2)
Components
1 R1 R2
R5 R4
Comments
Sets voltage gain
R
AVj1aR1 for one channel
R
AV
e
1a
R5
for
the
other
Where R’ is the equivalent resistance
of R2 in parallel with an internal 10k
resistor
10k R2
Re
R2a10k
If R2 m 10k then
R2
AVj1aR1
2 R3
Adjusts output symmetry for maximum
power output
3 RO CO
Works to stabilize internal output
stage Necessary for stability CO
should be ceramic disc or equivalently
good high frequency capacitor
4 C1 C9
Input coupling capacitor Low
frequency pole set by
1
FL1e2qZ (non-inverting) C1
Decreasing capacitor value will also
increase noise
Typical Applications (Continued)
Components
5 C4 C5
6 C3
7 C2 C6
8 CC
9 CS
Comments
Bootstrap capacitors used to increase
drive to output stage
Improves power supply rejection
Increasing C3 increases turn-on delay
(approximately 2 ms per mF)
Inverting input DC decouple Low
frequency pole
1
FL2e2qZ(inverting)C2
Z (inverting) 10 kX
Output coupling capacitor Isolates
pins 10 and 8 from load Low
frequency pole
1
FL3e2qRLCC
Power supply filtering
FIGURE 2 10W Channel Stereo Amplifier Application and Test Circuit
TL H 5129 – 4
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM2005.PDF ] | |
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