NTE NTE7157

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:
POUT = 2.5W/Ch Typ (VCC = 9V, RL = 4Ω, f = 1kHz, THD = 10%)
POUT = 3.0W/Ch Typ (VCC = 9V, RL = 3Ω, f = 1kHz, THD = 10%)
D Voltage Gain:
GV = 45.0dB Typ (Rf = 120Ω, f = 1kHz)
GV = 56.5dB Typ (Rf = 0Ω, f = 1kHz)
D Small Quiescent Current: ICCQ = 21mA Typ (VCC = 9V, VIN = 0)
D Ripple Rejection Ratio: RR = –52dB Typ (VCC = 9V, fripple = 100Hz, Rg = 600Ω)
D Crosstalk: CT = –50dB Typ (VCC = 9V, f = 1kHz, Rg = 600Ω)
D Output Noise Voltage: Vno = 0.3mVrms Typ (VCC = 9V, Rg = 10kΩ, BW = 20Hz to 20kHz)
D Stand–By Switch
D Soft Clip
D Built–In Thermal Shut Down Protection Circuit
D Operating Supply Voltage Range: VCC(opr) = 5V to 12V (TA = +25°C)
D Low Popping Noise at Power ON
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Output Current (Peak/Ch), IO(peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5A
Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0W
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Note 1. Value for mounting on PC board.
Electrical Characteristics: (VCC = 9V, RL = 4Ω, Rg = 600Ω, f = 1kHz, TA = +25°C unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
–
21
45
mA
2.0
2.5
–
W
THD = 10%, RL = 3Ω
–
3.0
–
W
Pout = 0.4W/Ch
–
0.2
1.0
%
Rf = 120Ω, Vout = 0.775Vrms (0dBm)
43
45
47
dB
Rf = 0Ω, Vout = 0.775Vrms (0dBm)
–
56.5
–
dB
–
30
–
kΩ
Quiescent Current
ICCQ
Vin = 0
Output Power
Pout
THD = 10%
Total Harmonic Distortion
Voltage Gain
THD
GV
Input Resistance
RIN
Output Noise Voltage
Vno
Rg = 10kΩ, BW = 20Hz to 20kHz
–
0.3
1.0
mVrms
Ripple Rejection Ratio
RR
Rg = 600Ω, fripple = 100Hz
–
–52
–
dB
Crosstalk
CT
Rg = 600Ω, Vout = 0.775Vrms (0dBm)
–
–50
–
dB
–
30
60
mV
–
1
–
µA
Input Offset Voltage
Stand–By Current
V6, V7
Istb
SW1 → OFF
Pin Connection Diagram
VCC2 1
16 VCC1
Output 1 2
Bootstrap 1 3
Tab
Tab
PW–GND
15 Output 2
14 Bootstrap 2
Pre–GND 6
PW–GND
11 Ripple
NF 1 7
10 NF 2
Input 1 8
9 Input 2
.202 (5.12)
16
9
1
8
.770 (19.5)
Max
.254 (6.45)
.168 (4.26) Max
.100 (2.54)
.141
(3.6)
.700 (17.78)
.138
(3.5)
.300 (7.62)