MS6863TGTR datasheet(10/14 Pages) MOSA

Numer części	MS6863TGTR

Szczegółowy opis	Dual 2W Power Amplifiers / Stereo Headphone Low Voltage, Pop Noise Free Function

PDF	14 Pages

Scroll/Zoom	100%

Producent	MOSA [MOSA ELECTRONICS]

Strona internetowa	http://www.mosanalog.com

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10 / 14 page

MOSA

MS6863

Dual 2W Power Amplifiers with Stereo Headphone

REV 4

10/14

www.mosanalog.com

HP-IN VOLTAGE (V)

Quiescent current vs. HP-IN voltage

BTL mode

SE mode

VDD=5V

APPLICATION INFORMATION

Application example

MS6863

8Ω

100uF

Headphone Jack

8Ω

HP-IN

1uF

20k

20K

-INA

-INB

-OUTB

+OUTB

-OUTA

+OUTA

1uF

GND

VDD

2,7,19

4,17

MCU

4.7uF

+INA

BYPASS

+INB

1uF

20k

100k

0.1uF

9,10,11,12

DC Gain = -RF / RIN = -1

Fig.1

A audio amplifier application circuit.

SE mode and BTL mode operation

As shown in block diagram and Fig.1, in the SE mode, the MS6863 operates as high current output dual operational

amplifiers. Amplifiers A1 and B1 are independent amplifiers with an externally configured gain of AV = - RF/RIN. As

amplifiers A2 and B2 are shutdown, then the amplifiers will be a high output impedance state.

In BTL mode, the audio signal from the -INA (-INB) pin is directed to the inverting input of A1(B1). The A2(B2) is

then activated with a closed-loop gain of AV = -1 fixed by two internal resistors. The outputs of A1(B1) and A2(B2) are

then used to drive the bridged-tied load.

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