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LM4990ITL bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4990ITL bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  LM4990 2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level General Description The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other por- table communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8 Ω BTL load and 2 watts of continuous average power (LD and MH only) to a 4 Ω BTL load with less than 1% distortion (THD+N+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 LM4990 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 LM4990 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown. The LM4990 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4990 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Improved PSRR at 217Hz & 1KHz 62dB j Power Output at 5.0V, 1% THD+N, 4 Ω (LD and MH only) 2W (typ) j Power Output at 5.0V, 1% THD+N, 8 Ω 1.25W (typ) j Power Output at 3.0V, 1% THD+N, 4 Ω 600mW (typ) j Power Output at 3.0V, 1% THD+N, 8 Ω 425mW (typ) j Shutdown Current 0.1µA (typ) Features n Available in space-saving packages: LLP, Exposed-DAP TSSOP, MSOP, and ITL n Ultra low current shutdown mode n Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions n 2.2 - 5.5V operation n No output coupling capacitors, snubber networks or bootstrap capacitors required n Unity-gain stable n External gain configuration capability n User selectable shutdown High or Low logic Level Applications n Mobile Phones n PDAs n Portable electronic devices Connection Diagrams Mini Small Outline (MSOP) Package MSOP Marking 200510B9 Top View Order Number LM4990MM See NS Package Number MUA08A 20051071 Top View Z - Plant Code X - Date Code TT - Die Traceability G - Boomer Family A5 - LM4990MM Boomer® is a registered trademark of National Semiconductor Corporation. January 2004 © 2004 National Semiconductor Corporation DS200510 www.national.com |
Số phần tương tự - LM4990ITL |
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Mô tả tương tự - LM4990ITL |
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