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LM4950 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4950 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 25 page LM4950 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier General Description The LM4950 is a dual audio power amplifier primarily de- signed for demanding applications in flat panel monitors and TV’s. It is capable of delivering 3.1 watts per channel to a 4 Ω single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8 Ω load, with less than 10% THD+N from a 12V DC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4950 does not require boot- strap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and mini- mal size. The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an inter- nal thermal shutdown protection mechanism along with short circuit protection. The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Quiscent Power Supply Current 16mA (typ) j POUT (SE) V DD = 12V, RL =4 Ω, 1% THD+N 3.1W (typ) j POUT (BTL) V DD = 12V, RL =8 Ω, 10% THD+N 7.5W (typ) j Shutdown current 40µA (typ) Features n Pop & click circuitry eliminates noise during turn-on and turn-off transitions n Low current, active-low shutdown mode n Low quiescent current n Stereo 3.1W output, R L =4 Ω n Mono 7.5W BTL output, R L =8 Ω n Short circuit protection n Unity-gain stable n External gain configuration capability Applications n Flat Panel Monitors n Flat panel TV’s n Computer Sound Cards Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. 20047078 FIGURE 1. Typical Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit August 2004 © 2004 National Semiconductor Corporation DS200470 www.national.com |
Số phần tương tự - LM4950 |
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Mô tả tương tự - LM4950 |
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