LM4980 Datasheet | National Semiconductor

Description The LM4980 is a stereo headphone audio amplifier, which when connected to a 3.0V supply, delivers 42m W to a 16Ω load with less than 1% THD+N. With the LM4980 packaged in the SD package, the customer benefits include low profile and small size. This package minimizes PCB area and maximizes output power. The LM4980 features circuitry that significantly reduces output transients (“clicks” and “pops”) while driving headphones during device turn-on and turn-off without costly external additional circuitry. The LM4980 also includes 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 j Output power (RL = 16Ω, VDD = 3.0V, THD+N = 1%) j Quiescent current (VDD = 3V) j Micropower shutdown current j Supply voltage operating range j PSRR @ 1k Hz, VDD = 3.0V j PSRR @ 217Hz, VDD = 3.0V 42m W (typ) 1m A (typ) 0.1µA (typ) 1.5V < VDD < 3.3V 90d B (typ) 100d B (typ) Features n 2-cell 1.5V to 3.3V battery operation n Unity-gain stable n “Click and pop” suppression circuitry for shutdown and power on/off transient with headphone loads n Active low micro-power shutdown n Thermal shutdown protection circuitry Applications n Portable two-cell audio products n Portable two-cell electronic devices n Portable MP3 player/recorders Typical Application FIGURE 1. Block Diagram Boomer ® is a registered trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation DS201429 .national. Connection Diagram SD Package Top View Order Number LM4980SD See NS Package Number SDA10A .national. Typical Connection FIGURE 2. Typical Application Circuit .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor...