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LM4962 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM4962 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 23 page LM4962 www.ti.com SNAS300C – DECEMBER 2005 – REVISED MARCH 2006 LM4962 Ceramic Speaker Driver Check for Samples: LM4962 1 FEATURES 2 • Pop & click circuitry eliminates noise during • Space-saving micro SMD package (2mm x turn-on and turn-off transitions 2.5mm) • Low current shutdown mode APPLICATIONS • Low quiescent current • Smart phones • Mono 15Vp-p BTL output, RL = 2μF+9.4Ω, f = • Mobile Phones and Multimedia Terminals 1kHz, 1% THD+N • PDA's, Internet Appliances, and Portable • Over-current protection Gaming • Over-Voltage Protection • Portable DVD • Unity-gain stable • Digital still cameras/camcorders • External gain configuration capability • Including Band switch function • Leakage cut switch (SW-LEAK) • Soft-Start function DESCRIPTION The LM4962 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phones, Smart Phones, PDA's and other portable applications. It is capable of driving 15Vpp (typ) BTL with less than 1% THD+N from a 3.2VDC power supply. The LM4962 features and low power consumption shutdown mode, an internal thermal shutdown protection mechanism, along with over current protection (OCP) and over voltage protection (OVP). Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal number of external components. The LM4962 does not require bootstrap capacitors, or snubber circuits. The LM4962 also features a Band-Switch function which allows the user to use one amplifier device for both receiver (earpiece) mode and ringer/loudspeaker mode. The LM4962 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. Additionally, the internal boost converter features a soft-start function. The LM4962 is unity-gain stable and can be configured by external gain-setting resistors. Table 1. Key Specifications VALUE UNIT Quiescent Power Supply Current 9 mA (typ) (Boost Converter + Amplifier) Voltage Swing in BTL at 1% THD, 15 Vp-p (typ) f = 1kHz Shutdown Current 0.1 μA (typ) 8.5V < VAMP < OVP V 9.5 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2006, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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