Part # LM4919 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4919 Boomer ® Audio Power Amplifier Series 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier

Part Details:

LM4919 May 2004 1.5V LM49191.5V, Mono 85mW BTL Output, 14mW Stereo Headphone ,Mono Audio AmplifierGeneral Description Key Specifications 85mW The unity gain stable LM4919 is both a mono-BTL audio n Mono-BTL output power power amplifier and a Single Ended (SE) stereo headphone n (R = 8, V = 1.5V, THD+N = 1%) 85mW (typ) L DD amplifier. Operating on a single 1.5V supply, the mono BTL n Stereo Headphone output power mode delivers 85mW into an 8 load at 1% THD+N. In n (R = 16, V = 1.5V, THD+N = 1%) 14mW (typ) L DD Single Ended stereo headphone mode, the amplifier delivers BTL n Micropower shutdown current 0.02µA (typ) 14mW per channel into a 16 load at 1% THD+N. n Supply voltage operating range 0.9V < V < 2.5V DD With the LM4919 packaged in the MM package, the cus- n PSRR 1kHz, V = 1.5V, R = 16 72dB (typ) DD L tomer benefits include low profile and small size. This pack- Output, age minimizes PCB area and maximizes output power. Features The LM4919 features circuitry that reduces output transients("clicks" and "pops") during device turn-on and turn-off, an n Single-cell 0.9V to 2.5V battery operation externally controlled, low-power consumption, active-low n BTL mode for mono speaker shutdown mode, and thermal shutdown. Boomer audio n Single ended headphone operation with coupling power amplifiers are designed specifically to use few exter- capacitors 14mW nal components and provide high quality output power in a

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LM4919.pdf Datasheet