NJM2149 Просмотр технического описания (PDF) - Japan Radio Corporation

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Компоненты Описание

производитель

NJM2149

LOW VOLTAGE AUDIO POWER AMPLIFIER

Japan Radio Corporation  

s APPLICATION CURCUIT

Rf 75kΩ

V+=+6V

10µF

6

Ci Ri

INPUT

4

0.1µF 3.0kΩ

3

C1

1.0µF

C2

2

4.7µF

50kΩ

145kΩ

50kΩ

BIAS

1

#A

5

#B

8

7

NJM2149

CD(POWER DOWN)

SPEAKER

32Ω

note:1.The CD terminal(1pin) should connect High level(>2.0V), when NJM2149 is active.

The standby mode, when the CD terminal is Low level(<0.8V).

2.To add the C1 and C2 capacitor, the power-supply-rejection-ratio will be improved.

When C1 is large value, C2 will be unnecessary.

3.The power-up time depend on the C1 and C2 capacitor.

4.The input current of CD terminal is as shown below figure.

V+

72kΩ

1pin

80kΩ

GND

5.No connect oscillation-protect RC required.

To connect oscillation-protect RC, if the NJM2149 oscillate with PC board/stray capacitor/long speaker wire

and others condition.

-3 -

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