NSC LM2005T-S Datasheet
LM2005 20 Watt Automotive Power Amplifier
LM2005 20 Watt Automotive Power Amplifier
April 1989
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 device 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
Connection Diagram
Plastic Package
Typical Application
Y
High peak current capability
Y
e
P
20W bridge
O
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
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
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/H/5129
LM2005T-M and LM2005T-S
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Operating Supply Voltage 18V
DC Supply Voltage (Note 1) 28V
Peak Supply Voltage (50 ms) 40V
Output Current
Repetitive (Note 2) 3.5A
Non-Repetitive 4.5A
Power Dissipation 30W
Operating Temperature
Storage Temperature
b
40§Ctoa85§C
b
60§Ctoa150§C
Lead Temp. (Soldering, 10 seconds) 260
C
§
LM2005T-M
Electrical Characteristics
R
th (heatsink)
e
4§C/W, unless otherwise specified
Refer to the bridge application circuit,
Figure 1
,T
amb
e
Parameter Test Conditions Min Typ Max Units
Supply Voltage 818V
Output Offset Voltage (Note 3) V
(between Pin 8 and 10) V
Total Quiescent Drain Current V
Includes Current in Feedback Resistors V
e
14.4V
S
e
13.2V
S
e
14.4V R
S
e
13.2V R
S
g
e
4X 75 150 mA
L
e
3.2X 70 160 mA
L
Output Power de10% fe1 kHz
e
V
S
e
V
S
14.4V R
13.2V R
e
4X 18 20 W
L
e
R
3.2X 20 22 W
L
e
3.2X 17 19 W
L
THD fe1 kHz
e
V
14.4V R
S
e
P
50 mW to 15W 1 %
O
e
V
13.2V R
S
e
P
50 mW to 13W 1 %
O
e
4X
L
e
3.2X
L
Input Sensitivity fe1 kHz
e
P
2W R
O
e
P
2W R
O
e
4X 9mV
L
e
3.2X 8mV
L
Input Resistance fe1 kHz 70 kX
Low Frequency Roll Off (b3 dB) R
High Frequency Roll Off (b3 dB) R
e
3.2X 40 Hz
L
e
3.2X 20 kHz
L
Closed Loop Voltage Gain fe1 kHz 45 50 dB
Total Input Noise Voltage R
Supply Voltage Rejection R
Efficiency V
Output Voltage with One Side V
of the Speaker Shorted to Ground V
Note 1: Internal voltage limit. Shuts down above 20V.
Note 2: Internal current limit.
Note 3: For LM2005T-M only.
Note 4: Bandwidth filter: 22 Hz to 22 kHz.
e
10 kX (Note 4) 3 10 mV
g
e
10 kX f
g
e
C
10 mFV
4
e
14.4V fe1 kHz
S
e
P
20W R
O
e
P
22W R
O
e
V
13.2V fe1 kHz
S
e
P
19W R
O
e
14.4V R
S
e
13.2V R
S
e
100 Hz
ripple
e
0.5V
ripple
e
4X 60 %
L
e
3.2X 60 %
L
e
3.2X 58 %
L
e
4X
L
e
3.2V
L
45 55 dB
25§C, A
20
e
50 dB,
V
g
150 mV
g
150 mV
2V
2
LM2005T-S
Electrical Characteristics
R
th (heatsink)
e
4§C/W, unless otherwise specified
Refer to the stereo application circuit,
Figure 2,
e
T
amb
Parameter Test Conditions Min Typ Max Units
Supply Voltage 818V
Quiescent Output Voltage V
Total Quiescent Drain Current V
Includes Current in Feedback Resistors V
e
14.4V 6.6 7.2 7.8 V
S
e
V
13.2V 6 6.6 7.2 V
S
e
14.4V 65 120 mA
S
e
13.2V 62 120 mA
S
Output Power fe1 kHz de10%
(Each Channel) V
e
14.4V R
S
e
V
13.2V R
S
e
V
16V R
S
e
4X 6 6.5 W
L
e
R
3.2X 78 W
L
e
R
2X 910 W
L
e
R
1.6X 10 11 W
L
e
3.2X 6 6.5 W
L
e
R
1.6X 910 W
L
e
2X 12 W
L
THD fe1 kHz
(Each Channel) V
Cross Talk V
(Note 5) R
e
14.4V R
S
e
P
50 mW to 4W 0.2 1 %
O
e
V
14.4V R
S
e
P
50 mW to 6W 0.3 1 %
O
e
V
13.2V R
S
e
P
50 mW to 3W 0.2 1 %
O
e
V
13.2V R
S
e
P
40 mW to 6W 0.3 1 %
O
e
14.4V
S
e
4X
L
e
V
4V
O
rms
e
R
5kX
g
e
4X
L
e
2X
L
e
3.2X
L
e
1.6X
L
e
f
1 kHz 40 60 dB
fe10 kHz 40 dB
Input Saturation Voltage 300 mV
Input Sensitivity fe1 kHz P
e
1W
O
e
R
4X 6
L
e
R
3.2X 5.5
L
Input Resistance fe1 kHz Non-Inverting Input 70 200 kX
Inverting Input 10 kX
Low Frequency Roll Off (b3 dB) R
High Frequency Roll Off (b3 dB) R
e
2X 50 Hz
L
e
2X 15 kHz
L
Voltage Gain (Open Loop) fe1 kHz 90 dB
Voltage Gain (Closed Loop) fe1 kHz 48 50 51 dB
Closed Loop Gain Matching 0.5 dB
Total Input Noise Voltage R
Supply Voltage Rejection R
Efficiency V
Note 5: For LM2005T-S only.
Note 6: Bandwidth filter: 22 Hz to 22 kHz.
e
10 kX (Note 6) 1.5 5 mV
g
e
10 kX f
g
e
C
10 mFV
3
e
14.4V fe1 kHz
S
e
R
4X P
L
e
R
2X P
L
e
V
13.2V fe1 kHz
S
e
R
3.2X P
L
e
R
1.6X P
L
e
100 Hz
ripple
e
0.5V
ripple
e
6.5W 70 %
O
e
10W 60 %
O
e
6.5W 70 %
O
e
10W 60 %
O
35 45 dB
25§C, G
e
50 dB,
v
mV
3
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