Available in space-saving 0.4mm pitch micro SMD and LLP
Tm packages
Description
The LM4673 is a single supply, high efficiency, 2.65W, mono, Class D audio amplifier. A low noise, filterless PWM architecture
eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.
The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single
5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.1W with less than 1% THD+N. Its
flexible power supply requirements allow operation from 2.4V to 5.5V.
The LM4673 has high efficiency with speaker loads compared to a typical Class AB amplifier. With a 3.6V supply driving an
8Ω speaker, the IC's efficiency for a 100mW power level is 80%, reaching 88% at 400mW output power.
The LM4673 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic
low (GND).
The gain of the LM4673 is externally configurable which allows independent gain control from multiple sources by summing the
signals. Output short circuit and thermal overload protection prevent the device from damage during fault conditions.
The LM4673 is a filterless 2.65W class D fully differential audio amplifier in a tiny 0.4mm pitch micro SMD package. The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. It is capable of delivering 1.24 Watts of average power to an 8 ohm load with less than 1% distortion (THD+N) from a 5V DC power supply.
The LM4673SDBD is an evaluation board designed to ease evaluation and effort during the development of a circuit using the LM4673SD. The evaluation board includes a measurement filter. It is an easy-to-use stand-alone board that requires power and GND, a differential input signal and anoutput load.
Features:
9-bump 0.4mm pitch micro SMD package
Very low iddq (2.6mA at 5V, 2.1mA at 3.6V)
PSRR 78dB at 217Hz
CMRR 70dB at 217Hz
SNR 97dB
THD+N 0.02% at 3.6V (Pout = 100mA)
Applications:
Mobile phones
PDAs
Portable electronic devices and accessories
Contents:
Fully Assembled LM4673SD Evaluation Board
Instructions for where to locate and download the datasheet
Please note: application information and board layout can be found in the LM4673SDdatasheet
The LM4673 is a filterless 2.65W class D fully differential audio amplifier in an 8 pin LLP package. The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. It is capable of delivering 1.24 Watts of average power to an 8 ohm load with less than 1% distortion (THD+N) from a 5V DC power supply.
The LM4673 is a filterless 2.65W class D fully differential audio amplifier in an 8 pin LLP package. The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. It is capable of delivering 1.24 Watts of average power to an 8 ohm load with less than 1% distortion (THD+N) from a 5V DC power supply.
The LM4673TMBD is an evaluation board designed to ease evaluation and effort during the development of a circuit using the LM4673TM. The evaluation board includes a measurement filter. It is an easy-to-use stand-alone board that requires power and GND, a differential input signal and an output load.
Features:
8-lead non-pullback Leadless Leadframe package
Very low iddq (2.6mA at 5V, 2.1mA at 3.6V)
PSRR 78dB at 217Hz
CMRR 70dB at 217Hz
SNR 97dB
THD+N 0.02% at 3.6V (Pout = 100mA)
Applications:
Mobile phones
PDAs
Portable electronic devices and accessories
Contents:
Fully Assembled LM4673TM Evaluation Board
Instructions for where to locate and download the datasheet
Please note: application information and board layout can be found in the LM4673TM datasheet
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
LM4673
