LM4902 Datasheet | National Semiconductor

Description The LM4902 is a bridged audio power amplifier capable of delivering 265m W of continuous average power into an 8Ω load with 1% THD+N from a 3.3V power supply. Boomer ® audio power amplifiers were designed specifically to provide high quality output power from a low supply voltage while requiring a minimal amount of external ponents. Since the LM4902 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications. The LM4902 features an externally controlled, low power consumption shutdown mode, and thermal shutdown protection. The closed loop response of the unity-gain stable LM4902 can be configured by external gain-setting resistors. j THD+N at 1k Hz for 675m W continuous average output power into 8Ω, VDD = 5V j Shutdown current 1.0% (max) 0.1µA (typ) Features n MSOP and LLP packaging n No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary n Thermal shutdown protection circuitry n Unity-gain stable n External gain configuration capability n Latest generation ’click and pop’ suppression circuitry Key Specifications j THD+N at 1k Hz for 265m W continuous Applications n Cellular phones n PDA’s n Any portable audio application 1.0% (max) average output power into 8Ω, VDD = 3.3V Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 2002 National Semiconductor Corporation DS200298 .national. Connection Diagrams MSOP MSOP Marking 20029878 20029802 Top View Order Number LM4902MM See NS Package Number MUA08A LLP Top View G - Boomer Family C3 - LM4902MM LLP Marking Top View Order Number LM4902LD See NS Package Number LDA08B Top View XY - Date Code TT - Die Traceability G - Boomer Family A3 - LM4902LD .national. Absolute Maximum Ratings (Note 2) Infrared (15 sec.) 220˚C If Military/Aerosp...