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LM4673SDBD bảng dữ liệu(PDF) 1 Page - Texas Instruments

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LM4673SDBD bảng dữ liệu(HTML) 1 Page - Texas Instruments

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LM4673, LM4673SDBD, LM4673TMBD
www.ti.com
SNAS317D – DECEMBER 2005 – REVISED MAY 2013
LM4673
Filterless, 2.65W, Mono, Class D Audio Power
Amplifier
Check for Samples: LM4673, LM4673SDBD, LM4673TMBD
1
FEATURES
DESCRIPTION
The LM4673 is a single supply, high efficiency,
2
Mono Class D Operation
2.65W, mono, Class D audio amplifier. A low noise,
No Output Filter Required for Inductive Loads
filterless PWM architecture eliminates the output filter,
Externally Configurable Gain
reducing external component count, board area
consumption, system cost, and simplifying design.
Very Fast Turn On Time: 17
μs (typ)
Minimum External Components
The LM4673 is designed to meet the demands of
mobile phones and other portable communication
"Click and Pop" Suppression Circuitry
devices. Operating on a single 5V supply, it is
Micro-Power Shutdown Mode
capable of driving a 4
Ω speaker load at a continuous
Available in Space-Saving 0.4mm Pitch
average output of 2.1W with less than 1% THD+N. Its
DSBGA and WSON Packages
flexible power supply requirements allow operation
from 2.4V to 5.5V.
APPLICATIONS
The LM4673 has high efficiency with speaker loads
compared to a typical Class AB amplifier. With a 3.6V
Mobile Phones
supply driving an 8
Ω speaker, the IC's efficiency for a
PDAs
100mW power level is 80%, reaching 88% at 400mW
Portable Electronic Devices
output power.
The LM4673 features a low-power consumption
KEY SPECIFICATIONS
shutdown mode. Shutdown may be enabled by
Efficiency at 3.6V, 400mW into 8
Ω Speaker
driving the Shutdown pin to a logic low (GND).
88% (typ)
The gain of the LM4673 is externally configurable
Efficiency at 3.6V, 100mW into 8
Ω Speaker
which allows independent gain control from multiple
80% (typ)
sources by summing the signals. Output short circuit
and thermal overload protection prevent the device
Efficiency at 5V, 1W into 8
Ω Speaker 86% (typ)
from damage during fault conditions.
Quiescent Current, 3.6V Supply 2.1mA (typ)
Total Shutdown Power Supply Current
0.01µA (typ)
Single Supply Range 2.4V to 5.5V
PSRR, f = 217Hz 78dB
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
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2013, 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.


Số phần tương tự - LM4673SDBD

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[Old version datasheet]   Filterless, 2.65W, Mono, Class D Audio Power Amplifier
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