NTE NTE1530

NTE1530
Integrated Circuit
Audio Power Amp w/ALC, 450mW
Description:
The NTE1530 is a silicon monolithic integrated circuit designed for audio power amplifier applications
at a 6 volt power supply.
This device contains a high gain low noise preamplifier, an automatic level control (ALC) and a high
gain low distortion power amplifier which makes this device the perfect audio circuit for use in cassette
tape recorders.
Features:
D All functions of a preamplifier, an ALC circuit and a power amplifier are encapsualated in a
14−Lead DIP package with heat sink TAB.
D Low noise, especially low pulsive noise
D Power amplifier stage has high gain, high output power and low distortion characteristics.
D Preamplifier stage has high gain and low distortion characteristics.
D Wide ALC range: output voltage change 1.8V TYP., ALC range 60dB TYP.
D Low spurious radiation when driven to output clipping level.
Absolute Maximum Ratings; (TA = +25°C unless otherwise specified)
Supply Voltage (DC), VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Supply Voltage (AC), VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10V
Circuit Current, ICC(peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA
Package Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4W
Operating Temperature Range, Topt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C
Note 1. Mounted and soldered on a 50mm x 50mm copper foil of a printed circuit board (XXX3 grade).
Recommended Conditions: (TA = +25°C unless otherwise specified)
Operating Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 to 10V
Electrical Characteristics: (TA = +25°C, VCC = 6V, f = 1kHz, NAB, RL (pre) = 10k2, RL(power) = 82
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Overall Characteristics
Circuit Current
ICC
No Signal
10
20
33
mA
Output Power
PO
VR − Max., THD = 10%
400
450
−
mW
T.H.D.
VR − Max, PO = 50mW
−
0.8
2.0
%
−
10
23
mVrms
−
1.8
9
dB
Total Harmonic Distortion
Output Noise Level
NL1
Using P. Head as an RG, VR − Max.
562
ALC Characteristics
ALC1
Vi = −70 − 40dBm, RL’ =
ALC Range
ALC2
THD 3%, RL ’ = 562
−
60
−
dB
Open Loop Voltage Gain
Av01
0 3Vrms
RL(pre) = 10k2, VO = 0.3V
55
65
−
dB
Voltage Gain
Av2
NAB VO = 0.3Vrms
−
30.8
−
dB
−
0.8
−
Vrms
20
−
−
k2
Preamplifier Stage
Maximum Output Voltage
VOM
Input Impedance
Ri1
RL(pre) =
10k2,
THD = 1%
Power Amplifier Stage
Open Loop Voltage Gain
Avo2
PO = 50mW
70
81
−
dB
Voltage Gain
AV2
PO = 50mW
−
46.8
−
dB
Output Noise Level
NL2
VR −MIN. (RG = 0)
−
0.4
2.0
mVrms
Input Impedance
Ri2
20
28
−
k2
Pin Connection Diagram
GND
1
14 Pre−Input
Pre−Feedback
2
13 ALC Input
Pre−Output
3
12 RP Head & Bias Filter
ALC Output
4
11 Filter
Erase Head Bias
5
10 Bootstrap
Power Input
6
9
VCC
Power Feedback
7
8
Power Output
Tab/GND
.968 (24.6) Max
.763 (19.4) Max
0.39
(0.99)
Dia
.300 (7.62)
.177 (4.5)
.256 (6.5)
.015
(0.38)
.026 (0.66)
.047 (1.2)
.126 (3.2)
.175 (4.4)
.195 (4.9)
.100 (2.54)
.330
(8.4)