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LM4923 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4923 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page LM4923 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select General Description The LM4923 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applica- tions. It is capable of delivering 1.1 watt of continuous aver- age power to an 8 Ω BTL load with less than 1% distortion (THD+N) from a 5V DC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4923 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage appli- cations where minimal power consumption is a primary re- quirement. The LM4923 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by logic low. Additionally, the LM4923 features an internal thermal shutdown protection mechanism. The LM4923 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions. Key Specifications j Improved PSRR at 217Hz 85dB(typ) j Power Output at 5.0V @ 1% THD+N 1.1W(typ) j Power Output at 3.3V @ 1% THD+N 400mW(typ) j Shutdown Current 0.1µA(typ) Features n Fully differential amplification n Available in space-saving LLP package n Ultra low current shutdown mode n Can drive capacitive loads up to 100pF n Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions n 2.4 - 5.5V operation n No output coupling capacitors, snubber networks or bootstrap capacitors required Applications n Mobile phones n PDAs n Portable electronic devices Connection Diagrams LQ Package 8 Pin LQ Marking 20071330 Top View Order Number LM4923LQ See NS Package Number LQB08A 20071302 X − Date Code TT − Die Traceability G − Boomer B2 − LM4923LQ Boomer® is a registered trademark of National Semiconductor Corporation. July 2004 © 2004 National Semiconductor Corporation DS200713 www.national.com |
Số phần tương tự - LM4923 |
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Mô tả tương tự - LM4923 |
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