MOSA

MS6544/6541

Class AB Stereo Headphone Driver with Mute

REV 2

1/9

www.mosanalog.com

Stereo Headphone Driver, 0dB / 6dB Gain

Low Voltage, Internal Mute Function

No Popping Noise When Power On / Off

FEATURES

‧Low supply voltage 2.7 to 6.5V

‧Internal mute function

‧No popping noise

‧Fixed gain of 6 dB for MS6544

Fixed gain of 0 dB for MS6541

‧High SNR , Slew rate

‧Low distortion

‧Excellent power supply ripple rejection

‧Low power consumption

‧Large output voltage swing

APPLICATIONS

‧MP3, PDA

‧Portable Digital Audio.

‧CD-ROM, DVD-ROM, CD-RW, DVD-RW

‧Cross-reference :

6dB: BH3544F, NJM2169

0dB: BH3541F, NJM2168

DESCRIPTION

The MS6544 is an integrated class AB stereo headphone

driver contained in an SO8 package. The MS6544 has

fixed gain of 6dB and the MS6541 has fixed gain of

0dB. The mute function to prevent popping sounds when

the power is turned on and off. It has good performance

at low voltage operation, the MS6544/41 ideally suited

for use in portable digital audio equipment.

BLOCK DIAGRAM

7

6

5

8

2

3

4

1

INB

OutB

OutA

MUTE

INA

MUTE

BIAS

90k

(180k)

90k

(180k)

6dB

(0dB)

6dB

(0dB)

PIN CONFIGURATION

Symbol

Pin

Description

OutA

1

Output A

Mute

2

Mute control

(Low: mute on, High: mute off)

INA

3

Input A

4

Negative supply

INB

5

Input B

6

Reference volatge

OutB

7

Output B

8

Positive supply

7

6

5

8

2

3

4

1

MS6544

MS6541

OUTB

INB

OUTA

MUTE

INA