BH3541F / BH3544F
Optical disc ICs
Headphone amplifier for CD-ROMs
BH3541F / BH3544F
The BH3541F and BH3544F are digital-source dual headphone amplifiers. The BH3541F has a fixed gain of 0dB and
the BH3544F has a fixed gain of 6dB so that external gain setting is unnecessary. Both the BH3541F and BH3544F have
internal mute functions so that prevention of the popping sound when power is turned on and off is greatly simplified.
Also, these ICs are equipped with thermal shutdown circuits to prevent damage from short circuits.

Product name
BH3541F
BH3544F
Fixed gain
0dB
6dB
!Applications
Devices that use the headphone output from CD-ROMs, CDs, MDs, personal computers, notebook computers,
camcorders, etc.
!Features
1) Internal mute function to prevent popping sounds when the power is turned on and off.
2) Built-in thermal shutdown circuit (150°C) to prevent damage to the IC if a short circuit occurs.
3) Compact SOP8 pin package.
!Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Applied voltage VMax 7.0 V
Power dissipation Pd 450 mW
Operating temperature Topr −25 ~ +75
Storage temperature Tstg −55 ~ +125 °C
°C
∗
∗Reduced by 4.5mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol Min. Typ. Max. Unit
VCC 2.8 − 6.5 V