LM4929 Datasheet | National Semiconductor

Description The LM4929 is an stereo audio power amplifier capable of delivering 40m W per channel of continuous average power into a 16Ω load or 25m W per channel into a 32Ω load at 1% THD+N from a 3V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. Since the LM4929 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4929 is configured for OCL (Output Capacitor-Less) outputs, operating with no DC blocking capacitors on the outputs. The LM4929 features a low-power consumption shutdown mode with a faster turn on time. Additionally, the LM4929 features an internal thermal shutdown protection mechanism. The LM4929 is unity gain stable and may be configured with external gain-setting resistors. Key Specifications j PSRR at 217Hz and 1k Hz j Output Power at 1k Hz with VDD = 2.4V, 65d B (typ) 25m W (typ) 40m W (typ) 2.0µA (max) 1m V (max) 1% THD+N into a 16Ω load j Output Power at 1k Hz with VDD = 3V, 1% THD+N into a 16Ω load j Shutdown current j Output Voltage change on release from Shutdown VDD = 2.4V, RL = 16Ω Features n n n n n n OCL outputs - No DC Blocking Capacitors External gain-setting capability Available in space-saving MSOP package Ultra low current shutdown mode 2V - 5.5V operation Ultra low noise Applications n Portable CD players n PDAs n Portable electronics devices Block Diagram FIGURE 1. Block Diagram Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS201324 .national. Typical Application FIGURE 2. Typical OCL Output Configuration Circuit Connection Diagram MSOP Package Top View (Note 10) Order Number LM4929MM See NS Package Number MUB10A .national. Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National...