S486(2005) 查看數據表（PDF） - Unisonic Technologies

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S486
(Rev.:2005)

DUAL 100mW AUDIO POWER AMPLIFIER WITH STANDBY MODE

Unisonic Technologies 

S486

CMOS IC

TYPICAL APPLICATION CIRCUIT

Stdby level

threshold=0.9V

Stdby ctrl

Right In CIN1

330nF

330nF

Left In

CIN2

20K

RIN1

CB

1µF

RIN2

20K

VCC

RFEED 1

20K 8

2

5 Stdby

VCC

1

3

BIAS UTC S486=Stdby

7

3

GND

4

220µF

COUT1

COUT2

220µF

CS

1µF

1K

1K

20K

ZL=32 Ω

ZL=32 Ω

RFEED 2

COMPONENTS INFORMATION

Components

RIN1, 2

CIN1, 2

RFEED1, 2

CS

CB

COUT1, 2

Functional Description

Inverting input resistor which sets the closed loop gain in conjunction with RFEED. This resistor

also forms a high pass filter with CIN (fc = 1 / (2 xπx RIN x CIN) .

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal.

Feedback resistor which sets the closed loop gain in conjunction with RIN.

AV= Closed Loop Gain= -RFEED/RIN.

Supply Bypass capacitor which provides power supply filtering.

Bypass capacitor which provides half supply filtering.

Output coupling capacitor which blocks the DC voltage at the load input terminal.

This capacitor also forms a high pass filter with RL (fc = 1 / (2 x π x RL x COUT)).

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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QW-R107-052,A

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