BL4863

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 5VDC 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 eliminatin...