LM48560_13 Datasheet, PDF (1/26 Pages) Texas Instruments – Audio Power Amplifier Series High Voltage Class H Ceramic Speaker Driver with Automatic Level Control

LM48560
www.ti.com
SNAS513E – AUGUST 2011 – REVISED MAY 2013
LM48560 Boomer™ Audio Power Amplifier Series High Voltage Class H Ceramic Speaker
Driver with Automatic Level Control
Check for Samples: LM48560
FEATURES
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•23 Class H Topology
• Integrated Boost Converter
• Bridge-Tied Load (BTL) Output
• Selectable Differential Inputs
• Selectable Control Interfaces
– (Hardware or Software mode)
• I²C Programmable ALC
• Low Supply Current
• Minimum External Components
• Micro-Power Shutdown
• Available in Space-Saving DSBGA Package
APPLICATIONS
• Touch screen Smart Phones
• Tablet PCs
• Portable Electronic Devices
• MP3 Players
KEY SPECIFICATIONS
• Output Voltage at V_DD = 3.6V,
R_L = 1.5μF+10Ω, THD+N ≤ 1%
– 30V_P-P (Typ)
• Quiescent Power Supply Current
at 3.6V (ALC Enabled)
– 4mA (Typ)
• Power Dissipation at 25V_P-P, 1W (Typ)
• Shutdown Current, 0.1μA (Typ)
DESCRIPTION
The LM48560 is a high voltage, high efficiency, Class
H driver for ceramic speakers and piezo actuators.
The LM48560’s Class H architecture offers significant
power savings compared to traditional Class AB
amplifiers. The device provides 30V_P-P output drive
while consuming just 4mA of quiescent current from a
3.6V supply.
The LM48560 features TI’s unique automatic level
control (ALC) that provides output limiter functionality.
The LM48560 features two fully differential inputs with
separate gain settings, and a selectable control
interface. In software control mode, the gain control
and device modes are configured through the I²C
interface. In hardware control mode, the gain and
input mux are configured through a pair of logic
inputs.
The LM48560 has a low power shutdown mode that
reduces quiescent current consumption to 0.1μA. The
LM48560 is a available in an ultra-small 16–bump
DSBGA package (1.97mm x 1.97mm).
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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 © 2011–2013, Texas Instruments Incorporated