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LM4781 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4781
Description  Overture™ Audio Power Amplifier Series 3 Channel 35W Audio Power Amplifier with Mute
Download  25 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4781 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage |V
+|+|V-|
(No Signal)
72V
Supply Voltage |V
+|+|V-|
(Input Signal)
70V
Common Mode Input Voltage
(V
+ or V-) and
|V
+|+|V-|
≤ 60V
Differential Input Voltage (Note 13)
60V
Output Current
Internally Limited
Power Dissipation (Note 3)
125W
ESD Susceptability (Note 4)
2.0kV
ESD Susceptability (Note 5)
200V
Junction Temperature (T
JMAX) (Note 9)
150˚C
Soldering Information
TA Package (10 seconds)
260˚C
Storage Temperature
-40˚C to +150˚C
Thermal Resistance
θ
JA
30˚C/W
θ
JC
0.9˚C/W
Operating Ratings (Notes 1, 2)
Temperature Range
T
MIN
≤ T
A
≤ T
MAX
−20˚C
≤ T
A
≤ +85˚C
Supply Voltage |V
+|+|V-|
20V
≤ V
TOTAL
≤ 70V
Note: Operation is guaranteed up to 70V; however, distor-
tion may be introduced from SPiKe protection circuitry if
proper thermal considerations are not taken into account.
Refer to the Thermal Considerations section for more
information.
Electrical Characteristics (Notes 1, 2)
The following specifications apply for V
+ = +28V, V- = −28V, I
MUTE = -1mA/channel and RL =8
Ω unless otherwise specified.
Limits apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4781
Units
(Limits)
Typical
Limit
(Note 6)
(Notes 7, 8)
|V
+|+|V-|
Power Supply Voltage (Note
10)
GND−V
-
≥ 9V
18
20
70
V (min)
V (max)
A
M
Mute Attenuation
I
MUTE = 0mA
110
80
dB (min)
P
O
Output Power (RMS)
THD+N = 0.5% (max)
f = 1kHz
|V
+|=|V-| = 20V, R
L =4
|V
+|=|V-| = 24V, R
L =6
|V
+|=|V-| = 28V, R
L =8
25
30
35
20
25
30
W (min)
W (min)
W (min)
THD+N
Total Harmonic Distortion +
Noise
P
O = 20W, f = 20Hz - 20kHz
A
V = 26dB
|V
+|=|V-| = 20V, R
L =4
|V
+|=|V-| = 24V, R
L =6
|V
+|=|V-| = 28V, R
L =8
0.5
0.3
0.2
%
%
%
X
talk
Channel Separation (Note 11)
P
O = 10W, f = 1kHz
70
dB
P
O = 10W, f = 10kHz
66
dB
SR
Slew Rate
V
IN = 1.2VRMS, f = 10kHz square
Wave.R
L =2k
9
5
V/µs (min)
I
DD
Total Quiescent Power
V
CM = 0V
75
150
mA (max)
Supply Current
V
O = 0V, IO =0A
V
OS
Input Offset Voltage
V
CM = 0V, IO = 0mA
1
10
mV (max)
I
B
Input Bias Current
V
CM = 0V, IO = 0mA
0.2
1
µA (max)
I
O
Output Current Limit
|V
+|=|V-| = 20V, t
ON = 10ms
4
3
A (min)
V
OD
Output Dropout Voltage (Note
12)
|V
+ -V
O|, V
+ = 20V, I
O = +100mA
|V
O -V
-|, V- = -20V, I
O = -100mA
1.5
2.5
4
4
V (max)
V (max)
PSRR
Power Supply Rejection Ratio
(Note 15)
V
+ = 30V to 10V, V- = -30V
V
CM = 0V, IO = 0mA
125
85
dB (min)
V
+ = 30V, V- = -30V to -10V
V
CM = 0V, IO = 0mA
110
85
dB (min)
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