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LM4924SD Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4924SD Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 16 page  LM4924 2 Cell Battery, 40mW Per Channel Output Capacitor-Less (OCL) Stereo Headphone Audio Amplifier General Description The LM4924 is a Output Capacitor-Less (OCL) stereo head- phone amplifier, which when connected to a 3.0V supply, delivers 40mW per channel to a 16 Ω 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 con- sumption, active-low shutdown mode is also included in the LM4924. Boomer audio power amplifiers are designed spe- cifically to use few external components and provide high quality output power in a surface mount packages. Key Specifications n OCL output power n (R L =16 Ω,V DD = 3.0V, THD+N = 1%) 40mW (typ) n Micropower shutdown current 0.1µA (typ) n Supply voltage operating range 1.5V < V DD < 3.6V n PSRR 100Hz, V DD = 3.0V, AV = 2.5 66dB (typ) Features n 2-cell 1.5V to 3.6V battery operation n OCL mode for stereo headphone operation n Unity-gain stable n “Click and pop” suppression circuitry for shutdown On and Off transients n Active low micropower shutdown n Thermal shutdown protection circuitry Applications n Portable two-cell audio products n Portable two-cell electronic devices Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. 20121057 FIGURE 1. Block Diagram October 2004 © 2004 National Semiconductor Corporation DS201210 www.national.com |
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