NTE NTE828 Datasheet

NTE828

Integrated Circuit

Audio Power Amp, 1.5W

Description:

The NTE828 is an audio amplifier in a 14–Lead DIP type package designed for use in medium power
consumer applications. The gain is internally set to 20 to keep external part count low , but the addition
of an external resi stor a nd capaci tor betw een Pi n2 and P in6 w ill increase the gain to any v alue u p to 200.

The i nputs a re g round r efer enced w hi le t he o utput i s a utomati cally b iased t o o ne h alf t he s upply v ol tage.

Features:

D Minimum External Parts
D Wide Supply Voltage Range
D Ground Referenced Input
D Excellent Supply Rejection
D Variable Voltage Gain
D Self–Centering Output Quiescent Voltage
D Low Distortion
D Low Voltage Operation, 4V

Applications:

D AM–FM Radio Amplifiers
D Intercoms
D TV Sound Systems
D Portable Tape Player Amplifiers
D Power Converters
D Lamp Drivers
D Ultrasonic Drivers
D Line Drivers
D Small Servo Drivers

Absolute Maximum Ratings:

Supply Voltage, V
Package Dissipation (Note 1), P
Input Voltage, V
Operating Junction Temperature, T
Operating Temperature Range, T
Storage Temperature Range, T

S

D

IN

J

opr

stg

Lead Temperature (During Soldering, 10sec), T

0° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L

22V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±0.4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Note 1 Pin3, Pin4, Pin5, Pin10, Pin11, and Pin12 at +25°C. Derate at 15°C/W above +25°C case.

Electrical Characterisitics: (TA = 25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Operating Supply Voltage V
Quiescent Current I
Output Power P

Voltage Gain A

Bandwidth BW VS = 12V, Pin2 and Pin6 Open – 300 – kHz
Total Harmonic Distortion THD VS = 12V, RL = 8Ω, P

Power Supply Rejection Ratio PSRR VS = 12V, f = 1kHz, C

Input Resistance R
Input Bias Current I

S

Q

OUT

V

IN

BIAS

VS = 16V, VIN = 0 – 20 35 mA
R1 = R2 = 180Ω,

THD = 10%, Note 2
VS = 12V, f = 1khz, 23 26 30 dB

10µF from Pin2 to Pin6 – 46 – dB

OUT

Pin2 and Pin6 Open

Pin2 and Pin6 Open, Referred to Output, Note 3

VS = 12V, Pin7 and Pin8 Open – 250 – nA

VS = 12V, RL = 8Ω 1.5 2.2 – W
VS = 6V, RL = 4Ω 0.6 0.8 – W

= 500mW, f = 1kHz,

BYPASS

= 10µF,

5 – 18 V

– 0.1 1.0 %

– 50 – dB

10 50 – kΩ

Note 2 The amplifier should be in high gain for full swing on higher supplies due to input voltage li-

mitations.

Note 3 If load and bypass capacitor are returned to VS rather than ground, PSRR is typically 30dB.

Pin Connection Diagram

Bypass

Gain

GND
GND
GND

14 8

17

.785 (19.95)

Max

1
2

3
4
5
6Gain
7(–) Input

14

V

13

V
GND

12
11 GND
10 GND

9 Bootstrap
8 (+) Input

.200 (5.08)

Max

S
out

.300

(7.62)

.100 (2.45)

.600 (15.24)

.099 (2.5) Min