LM4919 Datasheet | National Semiconductor

Description The unity gain stable LM4919 is both a mono-BTL audio power amplifier and a Single Ended (SE) stereo headphone amplifier. Operating on a single 1.5V supply, the mono BTL mode delivers 85m W into an 8Ω load at 1% THD+N. In Single Ended stereo headphone mode, the amplifier delivers 14m W per channel into a 16Ω load at 1% THD+N. With the LM4919 packaged in the MM package, the customer benefits include low profile and small size. This package minimizes PCB area and maximizes output power. The LM4919 features circuitry that reduces output transients ("clicks" and "pops") during device turn-on and turn-off, an externally controlled, low-power consumption, active-low shutdown mode, and thermal shutdown. Boomer audio power amplifiers are designed specifically to use few external ponents and provide high quality output power in a surface mount package. Key Specifications n n n n n n n Mono-BTL output power (RL = 8Ω, VDD = 1.5V, THD+N = 1%) 85m W (typ) Stereo Headphone output power (RL = 16Ω, VDD = 1.5V, THD+N = 1%) 14m W (typ) Micropower shutdown current 0.02µA (typ) Supply voltage operating range 0.9V < VDD < 2.5V PSRR 1k Hz, VDD = 1.5V, RL = 16Ω 72d B (typ) Features n Single-cell 0.9V to 2.5V battery operation n BTL mode for mono speaker n Single ended headphone operation with coupling capacitors n Unity-gain stable n "Click and pop" suppression circuitry n Active low micropower shutdown n Low current, active-low mute mode n Thermal shutdown protection circuitry Applications n Portable one-cell audio products n Portable one-cell electronic devices Typical Application FIGURE 1. Block Diagram Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200821 .national. Connection Diagrams MSOP Package Top View Order Number LM4919MM See NS Package Number MUB10A for MSOP MSOP Marking 200821F9 - Plant Code X - Date Code T - Die Traceability G - Boomer Family B6 -...