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LM4842MT bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4842MT bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 31 page  LM4842 Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive General Description The LM4842 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+N. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4842 incorporates a DC volume control, stereo bridged audio power amplifiers, new cap-less headphone driver circuit (patent pending), se- lectable gain or bass boost, and an input mux making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4842 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, the LM4842MH will deliver 2W into 4 Ω. The LM4842MT will deliver 1.1W into 8Ω. See the Application Information section for LM4842MH usage information. Note 2: An LM4842MH 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 (Shutdown Low) 0.2µA(typ) Features n Stereo headphone amplifier mode that eliminates the Output Coupling Capacitors (patent pending) n Advanced “click and pop” suppression circuitry n Acoustically Enhanced DC Volume Control Taper n 2 Channel Stereo Input MUX n System Beep Detect n Stereo switchable bridged/single-ended power amplifiers n Selectable internal/external gain and bass boost 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 20028102 Top View Order Number LM4842MT See NS Package Number MTC28 for TSSOP Order Number LM4842MH See NS Package Number MXA28A for Exposed-DAP TSSOP Boomer® is a registered trademark of NationalSemiconductor Corporation. September 2002 © 2002 National Semiconductor Corporation DS200281 www.national.com |
Số phần tương tự - LM4842MT |
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Mô tả tương tự - LM4842MT |
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