LM48556 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – Fully Differential, Mono, Ceramic Speaker Driver

LM48556
www.ti.com
SNAS452B – JUNE 2008 – REVISED MAY 2013
LM48556 Boomer™ Fully Differential, Mono, Ceramic Speaker Driver
Check for Samples: LM48556
FEATURES
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•23 Fully Differential Amplifier
• Externally Configurable Gain
• Integrated Charge Pump
• Low Power Shutdown Mode
• Soft Start Function
APPLICATIONS
• Mobile Phones
• PDA's
• Digital Cameras
KEY SPECIFICATIONS
• Output Voltage Swing
– V_DD = 3.6V, 1kHz 14.2V_PP (typ)
– V_DD = 4.5V, 1kHz 17.5V_PP (typ)
• Power Supply Rejection Ratio
– f = 217Hz, V_DD = 3.6V 80dB (typ)
• I_DD at V_DD = 3.6V 4.8mA (typ)
• Wake-Up Time 0.5ms (typ)
DESCRIPTION
The LM48556 is a single supply, mono, ceramic
speaker driver with an integrated charge-pump,
designed for portable devices, such as cell phones,
where board space is at a premium. The LM48556
charge pump allows the device to deliver 17.5V_PP
(typ) from a single 4.5V supply. Additionally, the
charge pump features a soft start function that
minimizes transient current during power-up.
The LM48556 features high power supply rejection
ratio (PSRR) of 80dB at 217Hz, allowing the device to
operate in noisy environments without additional
power supply conditioning. Flexible power supply
requirements allow operation from 2.7V to 5.0V.
Additionally, the LM48556 features a differential input
function and an externally configurable gain. A low
power shutdown mode reduces supply current
consumption to 0.1μA.
Superior click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
The LM48556 is available in an ultra-small 12-bump
DSBGA package (2mm x 1.5mm).
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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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All other trademarks are the property of their respective owners.
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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.
Copyright © 2008–2013, Texas Instruments Incorporated