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LM4673

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2.65W 单声道、模拟输入 D 类扬声器放大器

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LM4673

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产品详情

Audio input type Analog Input Architecture Class-D Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.4 Load (min) (Ω) 4 Output power (W) 2.65 SNR (dB) 97 THD + N at 1 kHz (%) 0.03 Iq (typ) (mA) 2.6 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.4 Analog supply voltage (max) (V) 5.5 PSRR (dB) 78 Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-D Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.4 Load (min) (Ω) 4 Output power (W) 2.65 SNR (dB) 97 THD + N at 1 kHz (%) 0.03 Iq (typ) (mA) 2.6 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.4 Analog supply voltage (max) (V) 5.5 PSRR (dB) 78 Operating temperature range (°C) -40 to 85
DSBGA (YFQ) 9 1.96000000000000028000000000000001 mm² 1.4000000000000001 x 1.4000000000000001 WSON (NGQ) 8 9 mm² 3 x 3
  • Mono Class D Operation
  • No Output Filter Required for Inductive Loads
  • Externally Configurable Gain
  • Very Fast Turn On Time: 17μs (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Available in Space-Saving 0.4mm Pitch DSBGA and WSON Packages

Key Specifications

  • Efficiency 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 Current
    0.01µA (typ)
  • Single Supply Range 2.4V to 5.5V
  • PSRR, f = 217Hz 78dB

All trademarks are the property of their respective owners.

  • Mono Class D Operation
  • No Output Filter Required for Inductive Loads
  • Externally Configurable Gain
  • Very Fast Turn On Time: 17μs (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Available in Space-Saving 0.4mm Pitch DSBGA and WSON Packages

Key Specifications

  • Efficiency 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 Current
    0.01µA (typ)
  • Single Supply Range 2.4V to 5.5V
  • PSRR, f = 217Hz 78dB

All trademarks are the property of their respective owners.

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.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM4673 Filterless, 2.65W, Mono, Class D Audio Power Amplifier 数据表 (Rev. D) 2013年 5月 1日
应用手册 Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 2019年 8月 26日
应用手册 AN-1849 An Audio Amplifier Power Supply Design (Rev. C) 2019年 6月 27日
应用手册 AN-1497 Filterless Class D Amplifiers (Rev. A) 2013年 5月 1日
应用手册 AN-1614 LM48510 Speaker AN- (Rev. B) 2013年 5月 1日
应用手册 AN-1737 Managing EMI in Class D Audio Applications (Rev. A) 2013年 5月 1日
应用手册 Application Note 1614 LM48510 Speaker Application Note (cn) 2007年 8月 14日
应用手册 Application Note 1497 Filterless Class D Amplifiers (cn) 最新英语版本 (Rev.A) 2006年 5月 24日

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评估板

LM4673TMBD — LM4673TMBD 免滤波、2.65W、单声道、D 类音频功率放大器评估板

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% (...)

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  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
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  • 持续可靠性监测
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