參數(shù)資料
型號： LM4781TA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： Overture⑩ Audio Power Amplifier Series 3 Channel 35W Audio Power Amplifier with Mute
中文描述： 35 W, 3 CHANNEL, AUDIO AMPLIFIER, PZFM27
封裝： PLASTIC, TO-220, 27 PIN
文件頁數(shù)： 3/25頁
文件大小： 1125K
代理商： LM4781TA
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)
Supply Voltage |V
+
| + |V
-
|
(Input Signal)
Common Mode Input Voltage
72V
70V
(V
+
or V
-
) and
|V
+
| + |V
-
|
≤
60V
Differential Input Voltage (Note 13)
Output Current
Power Dissipation (Note 3)
ESD Susceptability (Note 4)
ESD Susceptability (Note 5)
Junction Temperature (T
JMAX
) (Note 9)
60V
Internally Limited
125W
2.0kV
200V
150C
Soldering Information
TA Package (10 seconds)
Storage Temperature
Thermal Resistance
θ
JA
θ
JC
260C
-40C to +150C
30C/W
0.9C/W
Operating Ratings
(Notes 1, 2)
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage |V
+
| + |V
-
|
20C
≤
T
A
≤
+85C
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 R
L
= 8
unless otherwise specified.
Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4781
Units
(Limits)
Typical
(Note 6)
18
Limit
(Notes 7, 8)
20
70
80
|V
+
| + |V
-
|
Power Supply Voltage (Note
10)
Mute Attenuation
GND V
-
≥
9V
V (min)
V (max)
dB (min)
A
M
I
MUTE
= 0mA
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
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
P
O
= 10W, f = 1kHz
P
O
= 10W, f = 10kHz
V
IN
= 1.2V
RMS
, f = 10kHz square
Wave.R
L
= 2k
V
CM
= 0V
V
O
= 0V, I
O
= 0A
V
CM
= 0V, I
O
= 0mA
V
CM
= 0V, I
O
= 0mA
|V
+
| = |V
-
| = 20V, t
ON
= 10ms
|V
+
- V
O
|, V
+
= 20V, I
O
= +100mA
|V
O
- V
-
|, V
-
= -20V, I
O
= -100mA
V
+
= 30V to 10V, V
-
= -30V
V
CM
= 0V, I
O
= 0mA
V
+
= 30V, V
-
= -30V to -10V
V
CM
= 0V, I
O
= 0mA
110
P
O
Output Power (RMS)
25
30
35
20
25
30
W (min)
W (min)
W (min)
THD+N
Total Harmonic Distortion +
Noise
0.5
0.3
0.2
70
66
9
%
%
%
dB
dB
X
talk
Channel Separation (Note 11)
SR
Slew Rate
5
V/μs (min)
I
DD
Total Quiescent Power
Supply Current
Input Offset Voltage
Input Bias Current
Output Current Limit
Output Dropout Voltage (Note
12)
75
150
mA (max)
V
OS
I
B
I
O
1
10
1
3
4
4
mV (max)
μA (max)
A (min)
V (max)
V (max)
0.2
4
1.5
2.5
V
OD
PSRR
Power Supply Rejection Ratio
(Note 15)
125
85
dB (min)
110
85
dB (min)
L
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