LM4924 Datasheet | National Semiconductor

Description The LM4924 is a Output Capacitor-Less (OCL) stereo headphone amplifier, which when connected to a 3.0V supply, delivers 40m W per channel to a 16Ω load with less than 1% THD+N. With the LM4924 packaged in the MM and SD packages, the customer benefits include low profile and small size. These packages minimizes PCB area and maximizes output power. The LM4924 features circuitry that reduces output transients (“clicks” and “pops”) during device turn-on and turn-off, and Mute On and Off. An externally controlled, low-power consumption, active-low shutdown mode is also included in the LM4924. Boomer audio power amplifiers are designed specifically to use few external ponents and provide high quality output power in a surface mount packages. Key Specifications n n n n n OCL output power (RL = 16Ω, VDD = 3.0V, THD+N = 1%) 40m W (typ) Micropower shutdown current 0.1µA (typ) Supply voltage operating range 1.5V < VDD < 3.6V PSRR 100Hz, VDD = 3.0V, AV = 2.5 66d B (typ) Features 2-cell 1.5V to 3.6V battery operation OCL mode for stereo headphone operation Unity-gain stable “Click and pop” suppression circuitry for shutdown On and Off transients n Active low micropower shutdown n Thermal shutdown protection circuitry n n n n Applications n Portable two-cell audio products n Portable two-cell electronic devices Typical Application FIGURE 1. Block Diagram Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS201210 .national. Connection Diagrams MSOP Package MSOP Marking Top View Order Number LM4924MM See NS Package Number MUB10A for MSOP SD Package Z- Plant Code X - Date Code T - Die Traceability G - Boomer Family B7 - LM4924MM SD Marking - Plant Code X - Date Code T - Die Traceability Bottom Line - Part Number Top View Order Number LM4924SD See NS Package Number SDA10A .national. Typical Connections FIGURE 2....