NTE7143
Integrated Circuit
Audio Power Amplifier, 20W
Description:
The NTE7143 is a monolithic power amplifier in a 5Lead TO220 type package offering very low
distortion and high quality performance for consumer audio applications.
This device delivers 20W into a 4
or 8
load on
25V supplies. Using an 8
load and
30V supplies,
over 30W of power may be delivered. The amplifier is designed to operate with a minimum of external
components. Device overload protection consists of both internal current limit and thermal shutdown.
The NTE7143 design takes advantage of advanced circuit techniques and processing to achieve ex-
tremely low distortion levels even at high output power levels. Other outstanding features include high
gain, fast slew rate and a wide power bandwidth, large output voltage swing, high current capability,
and a very wide supply range. The amplifier is internally compensated and stable for gains of 10 or
greater.
Features:
D
Up to 30W Output Power
D
A
VO
Typically 90dB
D
Low Distortion: 0.015%, 1kHz, 20W
D
Wide Power Bandwidth: 70kHz
D Protection for AC and DC Short Circuits to GND
D
Thermal Protection with Parole Circuit
D
High Current Capability: 4A
D
Wide Supply Range: 16V 60V
D
Internal Output Protection Diodes
D
94dB Ripple Rejection
Applications:
D
High Performance Audio Systems
D
Bridge Amplifiers
D
Stereo Phonographs
D
Servo Amplifiers
D
Instrument Systems
Absolute Maximum Ratings: (Note 1)
Supply Voltage, V
CC
60V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
I
V
EE
to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Note 2), P
D
30W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature, T
J
150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec), T
L
+260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoCase, R
thJC
3
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoAmbient, R
thJA
73
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. "Absolute Maximum Ratings" indicate limits beyond which damage to the device may occur.
Operating ratings indicate conditions for which the device is functional, but do not guarantee
specific performance limits.
Note 2. Assumes T
TAB
equals 60
C max. For operation at higher tab temperature and at ambient
temperatures greater than 25
C, the NTE7143 must be derated based on a maximum 150
C
junction temperatur. Thermal resistance depends upon device mounting techniques. R
thJC
is typically 2
C/W.
Electrical Characteristics: V
CC
= +25V, V
EE
= 25V, T
A
= +25
C, R
L
= 8
, A
V
= 20 (26dB),
f
o
= 1kHz unless otherwise specified)
Parameter
Test Conditions
Typ
Tested Limits
Unit
Supply Current
P
OUT
= 0W
70
100
mA
Output Power
THD = 1%, Note 3
25
W
Total Harmonic Distortion
P
OUT
= 20W, f
o
= 1kHz, Note 3
0.015
%
P
OUT
= 20W, f
o
= 20kHz, Note 3
0.05
0.4
%
P
OUT
= 20W, R
L
= 4
, f
o
= 1kHz, Note 3
0.022
%
P
OUT
= 20W, R
L
= 4
, f
o
= 20kHz, Note 3
0.07
0.6
%
Offset Voltage
1
15
mV
Input Bias Current
0.2
2
A
Input Offset Current
0
0.5
A
GainBandwidth Product
f
o
= 20kHz
5.5
MHz
Open Loop gain
DC
90
dB
PSRR
V
CC
, 1kHz, 1V
rms
95
52
dB
V
EE
, 1kHz, 1V
rms
83
52
dB
Max. Slew rate
20W, 8
, 70kHz BW
8
V/
s
Current Limit
V
OUT
= V
SUPPLY
10V
4
3
A
Equivalent Input Noise Voltage
R
S
= 600
, CCIR
3
V
rms
Note 3. Assumes the use of a heat sink having a thermal resistance of 1
C/W and no insulator with
an ambient temperature of 25
C. Because the output limiting circuitry has a negative temper-
ature coefficient, the maximum output power delivered to a 4
load may be slightly reduced
when the tab temperature exceeds 55
C.
V
EE
Output
V
CC
() Input
(+) Input
.364
(9.25)
Max
.850
(21.6)
Max
.619
(15.72)
Max
1
2
3
4
5
.896
(22.76)
Max
.408 (10.37
Max
.182 (4.62) Max
.114 (2.9)
.135 (3.45)
.150 (3.81)
0.45 (1.37)
Max
.182
(4.62)
Pin Connection Diagram
(Front View)
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