LM4962_14 Datasheet, PDF (1/23 Pages) Texas Instruments – Ceramic Speaker Driver

LM4962
www.ti.com
SNAS300C – DECEMBER 2005 – REVISED MARCH 2006
LM4962
Ceramic Speaker Driver
Check for Samples: LM4962
FEATURES
1
•2 Pop & click circuitry eliminates noise during
turn-on and turn-off transitions
• Low current shutdown mode
• Low quiescent current
• Mono 15Vp-p BTL output, R_L = 2μF+9.4Ω, f =
1kHz, 1% THD+N
• Over-current protection
• Over-Voltage Protection
• Unity-gain stable
• External gain configuration capability
• Including Band switch function
• Leakage cut switch (SW-LEAK)
• Soft-Start function
• Space-saving micro SMD package (2mm x
2.5mm)
APPLICATIONS
• Smart phones
• Mobile Phones and Multimedia Terminals
• PDA's, Internet Appliances, and Portable
Gaming
• Portable DVD
• Digital still cameras/camcorders
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 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.
Quiescent Power Supply Current
(Boost Converter + Amplifier)
Voltage Swing in BTL at 1% THD,
f = 1kHz
Shutdown Current
OVP
Table 1. Key Specifications
VALUE
9
UNIT
mA (typ)
15
0.1
8.5V < V_AMP <
9.5
Vp-p (typ)
μA (typ)
V
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2006, Texas Instruments Incorporated