BL4863TS Datasheet, PDF (1/11 Pages) SHANGHAI BELLING CO., LTD. – Stereo headphone amplifier mode

BL4863
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
(THD+N) from a 5V_DC power supply. In addition, the HP-IN input pin allows the BL4863 to
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
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Total 11 Pages