LM4880 查看數據表（PDF） - Unisonic Technologies

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LM4880

DUAL 250mW AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE

Unisonic Technologies 

LM4880

„ AUTOMATIC SHUTDOWN CIRCUIT

CMOS IC

VDD

AUDIO

20kΩ

0.1μF

INPUT

+

0.33μF 20kΩ

2 - UTC 8 1

LM4880

3+

5

VDD

+

1μF

4

Rsd

100kΩ

100μF

+

RO

1kΩ

Rp

1MΩ

HEADPHONE JACK

Figure 2. Automatic Shutdown Circuit

TO CHANNEL B

OUTPUT(PIN 7)

VIA COUPLING

CAPACITOR

„ AUTOMATIC SWITCHING CIRCUIT

V DD

AUDIO

20kΩ

0.1μF

INPUT

20kΩ

+

0.33μF

2 - UTC 8 1

3

LM4880

+

5

VDD

+

4

1μF

Rsd

100kΩ

100µF

+

RO

Rp 1kΩ

1MΩ

20kΩ

V DD

0.1µF

20kΩ

+

0.33μF

+

1μF

6

4-

5

3 + LM4861 8

2 71

RL

8Ω

HEADPHONE JACK

TO UTC LM4880

CHANNEL B OUTPUT

(PIN 7) VIA COUPLING

CAPACITOR

Figure 3.Automatic Switching Circuit

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

5 of 11

QW-R502-033,B

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