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LM4841LQ bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4841LQ bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 31 page LM4841 Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive General Description The LM4841 is a monolithic integrated circuit that provides DC volume control and stereo bridged audio power amplifi- ers capable of producing 2W into 4 Ω (Note 1) or 2.2W into 3 Ω (Note 2) with less than 1.0% THD. The LM4841 uses advanced, latest generation circuitry to eliminate all traces of clicks and pops when the supply voltages is first applied. The amplifier has a headphone- amplifier-select input pin that is used to switch the amplifiers from bridge to single-ended mode for driving headphones. A new circuit topology eliminates headphone output coupling capacitors (patent pending). Boomer® audio integrated circuits are designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4841 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4841 features an externally controlled, low-power consumption shutdown mode (Shutdown Low), and both a power amplifier and headphone mute for maximum system flexibility and performance. Note 1: When properly mounted to the circuit board, LM4841MH and LM4841LQ will deliver 2W into 4 Ω. The LM4841MT will deliver 1.1W into 8Ω. See the Application Information section for LM4841MH usage information. Note 2: An LM4841MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3 Ω. Key Specifications n P O at 1% THD+N n into 3 Ω (MH and LQ) 2.2W (typ) n into 4 Ω ( MH and LQ) 2.0W (typ) n into 8 Ω (MT, MH, and LQ) 1.1W (typ) n Single-ended THD+N at 85mW into 32 Ω 1.0%(typ) n Shutdown current 0.7µA (typ) Features n Stereo headphone amplifier mode that eliminates the Output Coupling Capacitors (patent pending) n Acoustically Enhanced DC Volume Control Taper n System Beep Detect n Stereo switchable bridged/single-ended power amplifiers n Selectable internal/external gain and bass boost n Advanced “click and pop” suppression circuitry n Thermal shutdown protection circuitry Applications n Portable and Desktop Computers n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Connection Diagrams TSSOP Package 20028002 Top View Order Number LM4841MT or LM4841MH See NS Package Number MTC28 for TSSOP and MXA28A for Exposed-DAP TSSOP Boomer® is a registered trademark of National Semiconductor Corporation. August 2002 © 2002 National Semiconductor Corporation DS200280 www.national.com |
Số phần tương tự - LM4841LQ |
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Mô tả tương tự - LM4841LQ |
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