BL4863

http://www.belling.com.cn

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Dual 2.2W Audio Amplifier Plus Stereo Headphone Function

Features

 Stereo headphone amplifier mode

 Unity-gain stable

 Power output at 5.0V, 1% THD+N, 3Ω

2.50 W (typ.)

 Power output at 5.0V, 1% THD+N, 4Ω

2.20 W (typ.)

 Power output at 5.0V, 1% THD+N, 8Ω

1.25 W (typ.)

 Single-ended mode TND+N at 75mW into 32 Ω load

0.5% (max)

 Ultra-low shutdown current

0.1 uA (typ.)

 2.0V – 5.5V power operation range

 Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions

 Thermal shutdown protection circuitry

 External gain configuration capability

 Exposed-DAP TSSOP20 package , DIP16 package SOP16 package

General Description

The BL4863 is a dual BTL connected Class-AB audio power amplifier designed for multimedia

monitors and other portable applications. It is capable of delivering 2.5 watts of continuous

average power to a 3Ω BTL load or 2.2 watts to a 4Ω BTL load with less than 1% distortion

operate in single-ended mode and drive stereo headphones.

The BL4863 was designed specifically to provide high quality output power with a minimal

amount of external components. With dual bridge speaker amplifiers and stereo headphone

amplifiers on one chip, it simplifies audio system design.

The BL4863 features an externally controlled shutdown mode, a stereo headphone driver mode,

and thermal shutdown protection. With special pop-click eliminating circuit, the BL4863

provides perfect pop-click characteristic during turn-on and turn-off transitions.

The BL4863 is unity-gain stable and can be configured by external gain-setting resistors.

Applications

 Multimedia monitors

 Portable and desktop computers

 Portable televisions