LM49153_15 Datasheet, PDF (1/31 Pages) Texas Instruments – Mono Audio Subsystem with Class G Headphone Amplifier, Class D Speaker Amplifier, Noise Gate and Speaker Protection

LM49153
www.ti.com
SNAS496C – JANUARY 2011 – REVISED MAY 2013
LM49153 Boomer™ Mono Audio Subsystem with Class G Headphone Amplifier, Class D
Speaker Amplifier, Noise Gate and Speaker Protection
Check for Samples: LM49153
FEATURES
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•23 Class G Ground Referenced Headphone
Outputs
• High Efficiency Class D Amplifier with Spread
Spectrum
• No Clip
• Speaker Protection
• Noise Gate
• I²C Volume and Mode Control
• Advanced Click-and-Pop Suppression
• Micro-Power Shutdown
APPLICATIONS
• Feature Phones
• Smart Phones
KEY SPECIFICATIONS
• Class G Headphone Amplifier,
HPV_DD = 1.8V, R_L = 32Ω
– IDDQ_HP, 1.2mA (Typ)
– P_OUT, THD+N ≤ 1%, 25mW (Typ)
– HP V_OS, 0.5mV (Typ)
• Mono Class D Speaker Amplifier,
R_L = 8Ω, THD+N < 1%
– P_OUT, LSV_DD = 5.0V, 1.35W (Typ)
– P_OUT, LSV_DD = 3.6V, 680mW (Typ)
– Efficiency 88% (Typ)
DESCRIPTION
The LM49153 is a fully integrated audio subsystem
designed for portable handheld applications such as
cellular phones. Part of Texas Instruments'
PowerWise family of products, the LM49153
combines an earpiece switch, a high efficiency 25mW
class G headphone amplifier, and a high efficiency
1.35W class D loudspeaker into a single device.
The headphone amplifiers feature Texas Instruments'
class G ground referenced architecture that creates a
ground-referenced output with dynamic supply rails
for optimum efficiency. The class D amplifier features
an ALC (Automatic Level Control) with a noise gate
that provides both no-clip and speaker protection.
Mode selection, shutdown control, and volume are
controlled through an I²C compatible interface.
Click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
The LM49153 is available in an ultra-small 25-bump
0.4mm pitch DSBGA package (2.30mm x 2.42mm).
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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