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LM4960 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM4960
Spiegazioni elettronici  Piezoelectric Speaker Driver
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Homepage  http://www.ti.com
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LM4960
www.ti.com
SNAS221C – OCTOBER 2004 – REVISED MAY 2013
LM4960
Piezoelectric Speaker Driver
Check for Samples: LM4960
1
FEATURES
DESCRIPTION
The LM4960 utilizes a switching regulator to drive a
23
Low Current Shutdown Mode
dual audio power amplifier. It delivers 24VP-P mono-
"Click and Pop" Suppression Circuitry
BTL to a ceramic speaker with less than 1.0%
Low Quiescent Current
THD+N while operating on a 3.0V power supply.
Unity-Gain Stable Audio Amplifiers
The LM4960's switching regulator is a current-mode
External Gain Configuration Capability
boost converter operating at a fixed frequency of
1.6MHz.
Thermal Shutdown Protection Circuitry
Boomer™ audio power amplifiers were designed
Wide Input Voltage Range (3.0V - 7V)
specifically to provide high quality output power with a
1.6MHz Switching Frequency
minimal
amount
of
external
components.
The
LM4960 does not require output coupling capacitors
APPLICATIONS
or bootstrap capacitors, and therefore is ideally suited
Mobile Phone
for mobile phone and other low voltage applications
where minimal power consumption is a primary
PDA's
requirement.
KEY SPECIFICATIONS
The LM4960 features a low-power consumption
externally controlled micropower shutdown mode.
VOUT @ VDD = 3.0 THD+N ≤ 1%: 24 VP-P (typ)
Additionally,
the
LM4960
features
and
internal
Power Supply Range: 3.0 to 7 V
thermal shutdown protection mechanism along with a
short circuit protection.
Switching Frequency: 1.6 MHz (typ)
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
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
Boomer is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2013, 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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