LM4960 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – Piezoelectric Speaker Driver

LM4960
www.ti.com
SNAS221C – OCTOBER 2004 – REVISED MAY 2013
LM4960
Piezoelectric Speaker Driver
Check for Samples: LM4960
FEATURES
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•23 Low Current Shutdown Mode
• "Click and Pop" Suppression Circuitry
• Low Quiescent Current
• Unity-Gain Stable Audio Amplifiers
• External Gain Configuration Capability
• Thermal Shutdown Protection Circuitry
• Wide Input Voltage Range (3.0V - 7V)
• 1.6MHz Switching Frequency
APPLICATIONS
• Mobile Phone
• PDA's
KEY SPECIFICATIONS
• V_OUT @ V_DD = 3.0 THD+N ≤ 1%: 24 V_P-P (typ)
• Power Supply Range: 3.0 to 7 V
• Switching Frequency: 1.6 MHz (typ)
DESCRIPTION
The LM4960 utilizes a switching regulator to drive a
dual audio power amplifier. It delivers 24V_P-P mono-
BTL to a ceramic speaker with less than 1.0%
THD+N while operating on a 3.0V power supply.
The LM4960's switching regulator is a current-mode
boost converter operating at a fixed frequency of
1.6MHz.
Boomer™ audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. The
LM4960 does not require output coupling capacitors
or bootstrap capacitors, and therefore is ideally suited
for mobile phone and other low voltage applications
where minimal power consumption is a primary
requirement.
The LM4960 features a low-power consumption
externally controlled micropower shutdown mode.
Additionally, the LM4960 features and internal
thermal shutdown protection mechanism along with a
short circuit protection.
The LM4960 is unity-gain stable and can be
configured by external gain-setting resistors.
Connection Diagram
Figure 1. 28-Pin WQFN (Top View)
See RSG0028A Package
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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.
Boomer is a trademark of Texas Instruments.
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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.
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