Part # LM4802B datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4802B Boomer ® Audio Power Amplifier Series Audio Power Amplifier with Boost Converter to Drive Ceramic Speakers

Part Details:

Audio March 2005 Power LM4802BAudio Power Amplifier with Boost Converter to Drive Amplifier Ceramic SpeakersGeneral Description Key Specifications The LM4802B integrates a Boost Converter with an Audio j Quiescent Power Supply Current 12mA (typ) Power Amplifier to drive Ceramic Speakers in portable ap- with plications. When powered by a 3V supply, it is capable of j BTL Voltage Swing forcing 12Vp-p across a 2µF + 30 bridge-tied-load (BTL) (2µF + 30 load, 1% THD+N, with less than 1% THD+N. V = 3V) 12Vp-p (typ) DD Boomer audio power amplifiers were designed specifically to j Shutdown Current 2µA (max) Boost provide high quality output power with a minimal amount ofexternal components. The LM4802B does not require boot-strap capacitors, or snubber circuits. Therefore it is ideally Features suited for portable applications requiring high output voltage n Pop & click circuitry eliminates noise during turn-on and Converter and minimal size. turn-off transitions The LM4802B features a low-power consumption shutdown n Low, 2µA (max) shutdown current mode. Additionally, the LM4802B features an internal ther- n Low, 12mA (typ) quiescent current mal shutdown protection mechanism. n 12Vp-p mono BTL output, load = 2µF + 30, V = 3V DD The LM4802B contains advanced pop & click circuitry that n Short circuit protection eliminates noises which would otherwise occur during n Unity-gain stable turn-on and turn-off transitions. n External gain configuration capability to The LM4802B is unity-gain stable. Its gain is set by externalresistors. Applications Drive n Cellphone n PDA Ceramic Connection Diagram LM4802BLQ (5x5)

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LM4802B.pdf Datasheet