NTE NTE7157 Datasheet
NTE7157
Integrated Circuit
Low Frequency Power Amplifier
Description:
The NTE7157 is an audio power integrated circuit in a 16–Lead DIP type package with built–in two
channels designed for use in a portable radio cassette tape recorder with power ON/OFF switch.
Features:
D High Power:
P
= 2.5W/Ch Typ (VCC = 9V, RL = 4Ω, f = 1kHz, THD = 10%)
OUT
= 3.0W/Ch Typ (VCC = 9V, RL = 3Ω, f = 1kHz, THD = 10%)
P
OUT
D Voltage Gain:
G
= 45.0dB Typ (Rf = 120Ω, f = 1kHz)
V
G
= 56.5dB Typ (Rf = 0Ω, f = 1kHz)
V
D Small Quiescent Current: I
D Ripple Rejection Ratio: RR = –52dB Typ (V
D Crosstalk: CT = –50dB Typ (V
D Output Noise Voltage: V
no
D Stand–By Switch
D Soft Clip
D Built–In Thermal Shut Down Protection Circuit
D Operating Supply Voltage Range: V
D Low Popping Noise at Power ON
= 21mA Typ (VCC = 9V, VIN = 0)
CCQ
= 9V, f
= 9V, f = 1kHz, Rg = 600Ω)
CC
= 0.3mV
CC
Typ (VCC = 9V, Rg = 10kΩ, BW = 20Hz to 20kHz)
rms
CC(opr)
= 5V to 12V (TA = +25°C)
ripple
= 100Hz, Rg = 600Ω)
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
DC Supply Voltage, V
Output Current (Peak/Ch), I
Power Dissipation (Note 1), P
Operating Temperature Range, T
Storage Temperature Range, T
CC
O(peak)
D
opr
stg
Note 1. Value for mounting on PC board.
20V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.0W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–25° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (VCC = 9V, RL = 4Ω, Rg = 600Ω, f = 1kHz, TA = +25°C unless otherwise
specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Quiescent Current I
Output Power P
CCQ
out
Vin = 0 – 21 45 mA
THD = 10% 2.0 2.5 – W
THD = 10%, RL = 3Ω – 3.0 – W
Total Harmonic Distortion THD P
Voltage Gain G
Input Resistance R
Output Noise Voltage V
V
IN
no
= 0.4W/Ch – 0.2 1.0 %
out
Rf = 120Ω, V
Rf = 0Ω, V
out
Rg = 10kΩ, BW = 20Hz to 20kHz – 0.3 1.0 mV
Ripple Rejection Ratio RR Rg = 600Ω, f
Crosstalk CT Rg = 600Ω, V
Input Offset Voltage V6, V
Stand–By Current I
stb
7
SW1 → OFF – 1 – µA
Pin Connection Diagram
1
Output 1
Bootstrap 1
2
3
Tab
= 0.775V
out
= 0.775V
(0dBm) 43 45 47 dB
rms
(0dBm) – 56.5 – dB
rms
– 30 – kΩ
= 100Hz – –52 – dB
ripple
= 0.775V
out
(0dBm) – –50 – dB
rms
– 30 60 mV
16
VCC1VCC2
Output 2
15
Bootstrap 2
14
Tab
PW–GNDPW–GND
rms
.100 (2.54)
Pre–GND
NF 1
Input 1
16 9
18
.770 (19.5)
6
7
8
.202 (5.12)
Max
.141
(3.6)
Ripple
11
NF 2
10
Input 2
9
.254 (6.45)
.168 (4.26) Max
.138
(3.5)
.700 (17.78)
.300 (7.62)
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