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LM4962TL Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4962TL Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 22 page  LM4962 Ceramic Speaker Driver General 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 3.2V DC 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 boot- strap 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. Key Specifications n Quiescent Power Supply Current (Boost Converter + Amplifier) 9mA (typ) n Voltage Swing in BTL at 1% THD, f=1KHz 15Vp-p (typ) n Shutdown current 0.1µA (typ) n OVP 8.5V < V AMP < 9.5V Features n Pop & click circuitry eliminates noise during turn-on and turn-off transitions n Low current shutdown mode n Low quiescent current n Mono 15Vp-p BTL output, R L = 2µF+9.4 Ω, f = 1kHz, 1% THD+N n Over-current protection n Over-Voltage Protection n Unity-gain stable n External gain configuration capability n Including Band switch function n Leakage cut switch (SW-LEAK) n Soft-Start function n Space-saving micro SMD package (2mm x 2.5mm) Applications n Smart phones n Mobile Phones and Multimedia Terminals n PDA’s, Internet Appliances, and Portable Gaming n Portable DVD n Digital still cameras/camcorders Boomer® is a registered trademark of National Semiconductor Corporation. January 2006 © 2006 National Semiconductor Corporation DS201422 www.national.com |
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