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LM4962 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM4962
Spiegazioni elettronici  Ceramic Speaker Driver
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Homepage  http://www.ti.com
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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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