NTE1273
Integrated Circuit
Dual, Audio Power Amp, 5W/Ch
Description:
The NTE1273 is a bipolar monolithic integrated circuit in a 20−Lead DIP type package. This 2 channel
audio power amplifier is ideal for use in high power car radio applications.
Features:
DLow Distortion
DSelf centering Bias
DHigh Peak Output Current
DDual Channel/BTL Amp Use
DLow Offset Voltage (Between Ch1 and Ch2 DC Voltage)
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC 18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Peak Current (Per Channel), IO(Peak) 4A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, PD20W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topr −20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg −55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (TA = +25°C, VCC = 13.2V, RL = 4Ω, Rg = 600Ω, Rf = 68Ω, f = 1kHz,
Dual channel operation, GV = 54dB unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Quiescent Current ICCQ 20 36 70 mA
Output Power POTHD = 10%, Note 1 4.2 4.8 −W
BTL, THD = 10%, Note 1 −15 −W
THD = 10%, RL = 2Ω−7.5 −W
Maximum Output Power POM Dual −6−W
BTL −20 −W
Total Harmonic Distortion THD Dual, PO = 1W −0.2 0.8 %
Output Noise Voltage VNO Rg = 10kΩ−1.2 3.0 mV
BW = 50Hz to 20kHz −1.2 3.0 mV
Note 1. GV = 47kΩ/Rf (GVmax = 70dB)
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 13.2V, RL = 4Ω, Rg = 600Ω, Rf = 68Ω,
f = 1kHz, Dual channel operation, GV = 54dB unless otherwise
specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Channel Separation CSR Rg = 10kΩ, PO = +10dBm − −58 −dB
Ripple Rejection RR VIN = 0dBm, 100Hz, Rg = 0Ω− −48 −dB
Input Resistance RIN −40 −kΩ
Voltage Gain GVO Rf = 0Ω70 75 −dB
VIN = −.245mVrms 70 75 −dB
Pin Connection Diagram
VCC
High Freq Comp 2
GND
High Freq Comp 1
Bypass 2
1
2
3
4
Bypass 1
Input 1
Feedback 1
5Bypass 1
6High Freq Comp 1
7Bypass 1
8GND
20
19
18
17
Bypass 2
Input 2
Feedback 2
High Freq Comp 2
16
15 Bypass 2
14
13
GND9Output 1 12
Output 210 11
.945 (24.0)
.602 (15.3)
.700 (17.78)
.335 (8.5)
.142 (3.6)
1.062 (26.9)
.197
(5.0)
.020 (.508) .118 (2.9) Typ
110
11
20
.161 (4.0)
1.200 (30.5) Max
