LM4781TA National Semiconductor, LM4781TA Datasheet - Page 3

• Manufacturer Part Number: LM4781TA
• Description: Audio Power Amplifier IC
• Manufacturer: National Semiconductor

Specifications of LM4781TA

• Amplifier Case Style: TO-220
• Peak Reflow Compatible (260 C): No
• Termination Type: Through Hole
• Supply Voltage Max: 56V
• Leaded Process Compatible: No
• Package / Case: 27-TO-220
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 3-Channel Stereo
• Output Power (typ): 35x3@8OhmW
• Audio Amplifier Function: Speaker
• Input Offset Voltage: 10@±28VmV
• Input Bias Current: 1uA
• Total Harmonic Distortion: 0.2@8Ohm@20W%
• Single Supply Voltage (typ): 18V
• Dual Supply Voltage (typ): ±12/±15/±18/±24/±28V
• Power Supply Requirement: Single/Dual
• Power Dissipation: 125W
• Unity Gain Bandwidth Product (typ): 8MHz
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 125dB
• Single Supply Voltage (min): 20V
• Single Supply Voltage (max): 70V
• Dual Supply Voltage (min): ±10V
• Dual Supply Voltage (max): ±35V
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 27 +Tab
• Package Type: TO-220
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

|V
A
P
THD+N
X
SR
I
V
I
I
V
PSRR
DD
B
O
M
O
talk
OS
OD
+
Absolute Maximum Ratings
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
The following specifications apply for V
Limits apply for T
Supply Voltage |V
(No Signal)
Supply Voltage |V
Common Mode Input Voltage
Differential Input Voltage (Note 13)
Output Current
Power Dissipation (Note 3)
ESD Susceptability (Note 4)
ESD Susceptability (Note 5)
Junction Temperature (T
| + |V
Symbol
(Input Signal)
-
|
Power Supply Voltage (Note
10)
Mute Attenuation
Output Power (RMS)
Total Harmonic Distortion +
Noise
Channel Separation (Note 11)
Slew Rate
Total Quiescent Power
Supply Current
Input Offset Voltage
Input Bias Current
Output Current Limit
Output Dropout Voltage (Note
12)
Power Supply Rejection Ratio
(Note 15)
A
+
+
= 25˚C.
| + |V
| + |V
-
-
JMAX
Parameter
|
|
) (Note 9)
+
= +28V, V
Internally Limited
|V
(Notes 1, 2)
+
(V
| + |V
+
(Notes 1,
GND − V
I
THD+N = 0.5% (max)
f = 1kHz
|V
|V
|V
P
A
|V
|V
|V
P
P
V
Wave.R
V
V
V
V
|V
|V
|V
V
V
V
V
MUTE
or V
O
V
O
O
IN
CM
O
CM
CM
+
CM
+
CM
+
+
+
+
+
+
+
+
O
-
| = |V
| = |V
| = |V
| = |V
| = |V
| = |V
| = |V
= 30V to 10V, V
= 30V, V
| ≤ 60V
-
= 26dB
= 20W, f = 20Hz - 20kHz
= 10W, f = 1kHz
= 10W, f = 10kHz
= 0V, I
- V
= 1.2V
- V
150˚C
= −28V, I
-
125W
2.0kV
= 0V, I
= 0V, I
= 0V
= 0V, I
= 0V, I
) and
200V
= 0mA
72V
70V
60V
O
-
|, V
L
|, V
-
-
-
-
-
-
-
| = 20V, R
| = 24V, R
| = 28V, R
| = 20V, R
| = 24V, R
| = 28V, R
| = 20V, t
-
= 2kΩ
≥ 9V
O
RMS
-
+
O
O
O
O
-
= -20V, I
= 0A
= 20V, I
= -30V to -10V
= 0mA
= 0mA
MUTE
= 0mA
= 0mA
, f = 10kHz square
3
Conditions
ON
Operating Ratings
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.
L
L
L
L
L
L
-
Soldering Information
Storage Temperature
Thermal Resistance
Temperature Range
Supply Voltage |V
= -1mA/channel and R
= -30V
= 4Ω
= 6Ω
= 8Ω
= 4Ω
= 6Ω
= 8Ω
O
O
= 10ms
TA Package (10 seconds)
θ
θ
T
JA
JC
= -100mA
= +100mA
MIN
≤ T
A
≤ T
MAX
+
| + |V
L
(Note 6) (Notes 7, 8)
-
Typical
= 8Ω unless otherwise specified.
|
110
125
110
0.5
0.3
0.2
0.2
1.5
2.5
18
25
30
35
70
66
75
9
1
4
(Notes 1, 2)
LM4781
20V ≤ V
−20˚C ≤ T
Limit
150
20
70
80
20
25
30
10
85
85
5
1
3
4
4
-40˚C to +150˚C
TOTAL
www.national.com
A
V/µs (min)
mA (max)
mV (max)
0.9˚C/W
≤ +85˚C
µA (max)
dB (min)
dB (min)
dB (min)
30˚C/W
(Limits)
V (max)
W (min)
W (min)
W (min)
V (max)
V (max)
V (min)
A (min)
Units
260˚C
≤ 70V
dB
dB
%
%
%