S486 데이터 시트보기 (PDF) - Unisonic Technologies

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S486

DUAL 100mW AUDIO POWER AMPLIFIER WITH STANDBY MODE

Unisonic Technologies 

S486

 TYPICAL APPLICATION CIRCUIT

Stdby level

threshold=0.9V

Stdby ctrl

RFEED1

Right In CIN1

330nF

20K

RIN1

CB

20K 8

2

5 Stdby

VCC

1

3

BIAS UTC S486=Stdby

1µF

330nF

7

RIN2

6

Left In

CIN2

20K

GND

4

VCC

CS

1µF

220µF

COUT1

1K

COUT2

220µF 1K

20K

RFEED2

CMOS IC

ZL=32 Ω

ZL=32 Ω

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 xπx RL x COUT)).

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

8 of 12

QW-R502-074.D

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