SNAS470D Datasheet, PDF (1/24 Pages) Texas Instruments – Output Fault Detection, I2C Volume and Mode Control, Input Mixer/Multiplexer

LM48100Q
www.ti.com
SNAS470D – OCTOBER 2008 – REVISED MARCH 2013
LM48100Q Boomer™ Mono, 1.3W Audio Power Amplifier with Output Fault Detection and
Volume Control
Check for Samples: LM48100Q
FEATURES
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•23 Output Fault Detection
• I²C Volume and Mode Control
• Input Mixer/Multiplexer
• High PSRR
• Individual 32-Step Volume Control
• Short Circuit and Thermal Protection
• Advanced Click-and-Pop Suppression
• Low Power Shutdown Mode
• Available in 14-pin HTSSOP Package
APPLICATIONS
• Automotive Instrument Clusters
• Hands-free Car Kits
• Medical
KEY SPECIFICATIONS
• Output Power at V_DD = 5V, R_L = 8Ω, THD+N ≤
1% 1.3W (typ)
• Quiescent Power Supply Current at 5V 6mA
(Typ)
• PSRR at 1kHz 74dB (Typ)
• Shutdown current 0.01μA (Typ)
DESCRIPTION
The LM48100Q is a single supply, mono, bridge-tied
load amplifier with I²C volume control, ideal for
automotive applications. A comprehensive output
fault detection system senses the load conditions,
protecting the device during short circuit events, as
well as detecting open circuit conditions.
Operating from a single 5V supply, the LM48100Q
delivers 1.3W of continuous output power to an 8Ω
load with < 1% THD+N. Flexible power supply
requirements allow operation from 3.0V to 5.5V. High
power supply rejection ratio (PSRR), 74dB at 1kHz,
allows the device to operate in noisy environments
without additional power supply conditioning.
The LM48100Q features dual audio inputs that can
be mixed/multiplexed to the device output. Each input
path has its own independent, 32-step volume
control. The mixer, volume control and device mode
select are controlled through an I²C compatible
interface. An open drain FAULT output indicates
when a fault has occurred. Comprehensive output
short circuit and thermal overload protection prevent
the device from being damaged during a fault
condition.
A low power shutdown mode reduces supply current
consumption to 0.01µA. Superior click and pop
suppression eliminates audible transients on power-
up/down and during shutdown. The LM48100Q is
available in an 14-pin HTSSOP 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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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