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)