1378

NTE1378
Integrated Circuit
Audio Power Amplifier, 10W
Description:
The NTE1378 is a monolithic integrated circuit in a 5–Lead TO220 type package intended for use as
an audio class AB amplifier. Typically, it provides 12W output power (THD = 10%) at VS = ±12V/4Ω.
This device provides high output current and has very low harmonic and cross–over distortion. Further, the NTE1378 incorporates a short circuit protection system comprising an arrangement for automatically limiting the dissipated power so as to keep the working point of the output transistors within
their safe operating area. A thermal shut–down system is also included.
Absolute Maximum Ratings:
Supply Voltage, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V
Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS
Differential Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±12V
Output Peak Current (Internally Limited), IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A
Power Dissipation (TC = +90°C), Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20W
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3°C/W
Min. Thermal Shut–Down Junction Temperature (VS = ±12V, Ptot = 9W, TA = +25°C), Tsd . +110°C
Electrical Characteristics: (VS = ±12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
±6
–
±15
V
Supply Voltage
VS
Quiescent Drain Current
Id
VS = ±15V
–
40
80
mA
Input Bias Current
Ib
VS = ±15V
–
0.2
3.0
µA
Input Offset Voltage
VOS
VS = ±15V
–
±8
–
mV
Input Offset Current
IOS
VS = ±15V
–
±80
–
nA
Output Offset Voltage
VOS
VS = ±15V
–
±10
±100
mV
Output Power
PO
THD = 10%, f = 1kHz, RL = 4Ω
–
12
–
W
THD = 10%, f = 1kHz, RL = 8Ω
6
8
–
W
Electrical Characteristics (Cont’d): (VS = ±12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Frequency Response (–3dB)
B
PO = 8W, RL = 4Ω
Input Sensitivity
Vi
f = 1kHz, PO = 10W, RL = 4Ω
–
200
–
mV
f = 1kHz, PO = 6W, RL = 8Ω
–
220
–
mV
f = 1kHz, Open Loop
–
75
–
dB
29.5
30.0
30.5
dB
PO = 0.1 to 8W, RL = 4Ω, f = 1kHz
–
0.2
–
%
PO = 0.1 to 4W, RL = 8Ω, f = 1kHz
–
0.1
1.0
%
Voltage Gain
GV
Test Conditions
THD
Typ
Max
10 to 140,000
f = 1kHz, Closed Loop
Total Harmonic Distortion
Min
Unit
Hz
Input Noise Voltage
eN
B = 22Hz to 22kHz, RL = 4Ω
–
3
10
µV
Input Noise Current
IN
B = 22Hz to 22kHz, RL = 4Ω
–
80
200
pA
Input Resistance (Pin1)
RI
f = 1kHz
0.5
5.0
–
MΩ
RL = 4Ω, Rg = 22kΩ, fripple = 100Hz
40
50
–
dB
PO = 12W, RL = 4Ω
–
850
–
mA
PO = 8W, RL = 8Ω
–
500
–
mA
Supply Voltage Rejection
Drain Current
SVR
Id
Pin Connection Diagram
(Front View)
Non–Inverting Input
Inverting Input
(+) VS
Output
(–) VS/Tab
.408
(10.37)
Max
.182 (4.62) Max
.054
(1.37)
Max
.114 (2.9)
.619
(15.72)
Max
.364
(9.25)
Max
.896
(22.76)
Max
1
2
3
4
5
.850
(21.6)
Max
.135 (3.45)
.150 (3.81)
.182
(4.62)
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