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LM4929MM bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4929MM bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 13 page LM4929 Stereo 40mW Low Noise Headphone Amplifier with OCL Output General Description The LM4929 is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16 Ω load or 25mW 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 components. Since the LM4929 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4929 is con- figured 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 mecha- nism. The LM4929 is unity gain stable and may be configured with external gain-setting resistors. Key Specifications j PSRR at 217Hz and 1kHz 65dB (typ) j Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16 Ω load 25mW (typ) j Output Power at 1kHz with VDD = 3V, 1% THD+N into a 16 Ω load 40mW (typ) j Shutdown current 2.0µA (max) j Output Voltage change on release from Shutdown V DD = 2.4V, RL =16 Ω 1mV (max) Features n OCL outputs — No DC Blocking Capacitors n External gain-setting capability n Available in space-saving MSOP package n Ultra low current shutdown mode n 2V - 5.5V operation n Ultra low noise Applications n Portable CD players n PDAs n Portable electronics devices Block Diagram Boomer® is a registered trademark of National Semiconductor Corporation. 20132441 FIGURE 1. Block Diagram December 2004 © 2004 National Semiconductor Corporation DS201324 www.national.com |
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Mô tả tương tự - LM4929MM |
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