PA4863L-N20-R datasheet(5/11 Pages) UTC

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PA4863

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 11

www.unisonic.com.tw

QW-R502-120.C

TYPICAL APPLICATION CIRCUIT

SLEEVE

AMP 1A

VDD

0.1µF

TANT

20KΩ

Audio

Input

1μF

20KΩ

-OUT A 5

+OUT A

8Ω

100µF

1kΩ

To HP-IN Circuit

50KΩ

VDD/2

-IN A

+IN A

Bypass

-IN B

+IN B

Shutdown

GND 2,7,15

100KΩ

20KΩ

1μF

Audio

Input

100kΩ

VDD

To Control Pin on

Headphone jack

20KΩ

-OUT B

+OUT B

8Ω

1kΩ

CONTROL PIN

HEADPHONE JACK

TIP

4,13

AMP 1B

AMP 2A

AMP 2B

HP-IN

RING

(CB size)

0.33μF

100µF

Note: Pin out shown for DIP-16. Refer to the PIN CONFIGURATION for the pin out of other packages.

Figure 1.Typical Audio Amplifier Application Circuit

EXTERNAL COMPONENTS DESCRIPTION

Components

Functional Description

The inverting input resistance, along with RF, set the closed-loop gain. RI, along with CI form a high

pass filter with fc=1/(2πRICI)

The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. CI, along with RI,

create a high pass filter with fc=1/(2πRICI). Refer to the section. Selecting Proper External

Components, for an explanation of determine the value of CI.

The feedback resistance, along with RI, set the closed-Ioop gain.

The supply bypass capacitor. Refer to the Power Supply Bypassing section for information about

properly placing and selecting the value of, this capacitor.

The capacitor, CB, filters the half-supply voltage present on the Bypass pin. Refer to the Selecting

Proper External Components section for information concerning proper placement and selecting

CB’S value.

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