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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM4873 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4873 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  LM4873 Dual 2.1W Audio Amplifier Plus Stereo Headphone Function General Description The LM4873 is a dual bridge-connected audio power ampli- fier which, when connected to a 5V supply, will deliver 2.1W toa4 Ω load (Note 1) or 2.4W to a 3Ω load (Note 2)with less than 1.0% THD+N. In addition, the headphone input pin al- lows the amplifiers to operate in single-ended mode to drive stereo headphones. A Mux Control pin toggles between the two stereo sets of amplifier inputs, allowing for two select- able amplifier closed-loop responses. Boomer audio power amplifiers were designed specifically to provide high quality output power from a surface mount package while requiring few external components. To sim- plify audio system design, the LM4873 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4873 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes cir- cuitry to reduce “clicks and pops” during device turn-on. Note 1: An LM4873MTE-1 which has been properly mounted to the circuit board will deliver 2.1W into 4 Ω. The other package options for the LM4873 will deliver 1.1W into 8 Ω. See the Application Information section for LM4873MTE-1 usage information. Note 2: An LM4873MTE-1 which has been properly mounted to the circuit board and forced-air cooled will deliver 2.4W into 3 Ω. Key Specifications n P O at 1% THD+N into 3 Ω (LM4873MTE-1) 2.4W(typ) into 4 Ω (LM4873MTE-1) 2.1W(typ) into 4 Ω (LM4873MTE) 1.9W(typ) into 8 Ω (LM4873) 1.1W(typ) n Single-ended mode - THD+N at 75mW into 32 Ω 0.5%(max) n Shutdown current 0.7µA(typ) Features n Input mux control and two separate inputs per channel n Stereo headphone amplifier mode n “Click and pop” suppression circuitry n Thermal shutdown protection circuitry n Exposed-DAP TSSOP and TSSOP packaging available Applications n Multimedia monitors n Portable and desktop computers n Portable audio systems Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. DS100993-31 * Refer to the section Proper Selection of External Components, for a detailed discussion of CB size. FIGURE 1. Typical Audio Amplifier Application Circuit April 2000 © 2000 National Semiconductor Corporation DS100993 www.national.com |
Số phần tương tự - LM4873 |
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Mô tả tương tự - LM4873 |
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