Catalog
2.65-W, mono, analog input Class-D speaker amp
Key Features
• Mono Class D OperationNo Output Filter Required for Inductive LoadsExternally Configurable GainVery Fast Turn On Time: 17μs (typ)Minimum External Components"Click and Pop" Suppression CircuitryMicro-Power Shutdown ModeAvailable in Space-Saving 0.4mm Pitch DSBGA and WSON PackagesKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω Speaker 88% (typ)Efficiency at 3.6V, 100mW into 8Ω Speaker 80% (typ)Efficiency at 5V, 1W into 8Ω Speaker 86% (typ)Quiescent Current, 3.6V Supply 2.1mA (typ)Total Shutdown Power Supply Current0.01µA (typ)Single Supply Range 2.4V to 5.5VPSRR, f = 217Hz 78dBAll trademarks are the property of their respective owners.Mono Class D OperationNo Output Filter Required for Inductive LoadsExternally Configurable GainVery Fast Turn On Time: 17μs (typ)Minimum External Components"Click and Pop" Suppression CircuitryMicro-Power Shutdown ModeAvailable in Space-Saving 0.4mm Pitch DSBGA and WSON PackagesKey SpecificationsEfficiency at 3.6V, 400mW into 8Ω Speaker 88% (typ)Efficiency at 3.6V, 100mW into 8Ω Speaker 80% (typ)Efficiency at 5V, 1W into 8Ω Speaker 86% (typ)Quiescent Current, 3.6V Supply 2.1mA (typ)Total Shutdown Power Supply Current0.01µA (typ)Single Supply Range 2.4V to 5.5VPSRR, f = 217Hz 78dBAll trademarks are the property of their respective owners.
Description
AI
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 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.
