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LM4667

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具有可选增益的 1.3W 单声道、模拟输入 D 类音频放大器

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数据表

LM4667

正在供货
数据表 立即订购

产品详情

Audio input type Analog Input Architecture Class-D Speaker channels (max) Mono Rating Catalog Load (min) (Ω) 4 Output power (W) 1.3 SNR (dB) 83 THD + N at 1 kHz (%) 0.8 Iq (typ) (mA) 8 Control interface Hardware Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 65 Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-D Speaker channels (max) Mono Rating Catalog Load (min) (Ω) 4 Output power (W) 1.3 SNR (dB) 83 THD + N at 1 kHz (%) 0.8 Iq (typ) (mA) 8 Control interface Hardware Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 65 Operating temperature range (°C) -40 to 85
DSBGA (YZR) 9 3.0625 mm² 1.75 x 1.75 VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • No Output Filter Required for Inductive Transducers
  • Selectable Gain of 6dB or 12dB
  • Very Fast Turn on Time: 5ms (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Short Circuit Protection
  • Space-Saving DSBGA and VSSOP Packages

Key Specifications

  • Efficiency at 3V, 100mW into 8Ω Transducer 74% (typ)
  • Efficiency at 3V, 450mW into 8Ω Transducer 84% (typ)
  • Efficiency at 5V, 1W into 8Ω Transducer 86% (typ)
  • Total Quiescent Power Supply Current: 3.5mA (typ)
  • Total Shutdown Power Supply Current: 0.01μA (typ)
  • Single Supply Range: 2.7V to 5.5V

All trademarks are the property of their respective owners.

  • No Output Filter Required for Inductive Transducers
  • Selectable Gain of 6dB or 12dB
  • Very Fast Turn on Time: 5ms (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Short Circuit Protection
  • Space-Saving DSBGA and VSSOP Packages

Key Specifications

  • Efficiency at 3V, 100mW into 8Ω Transducer 74% (typ)
  • Efficiency at 3V, 450mW into 8Ω Transducer 84% (typ)
  • Efficiency at 5V, 1W into 8Ω Transducer 86% (typ)
  • Total Quiescent Power Supply Current: 3.5mA (typ)
  • Total Shutdown Power Supply Current: 0.01μA (typ)
  • Single Supply Range: 2.7V to 5.5V

All trademarks are the property of their respective owners.

The LM4667 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The LM4667 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4667 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is capable of driving 8Ω transducer loads at a continuous average output of 450mW with less than 1%THD+N. Its flexible power supply requirements allow operation from 2.7V to 5.5V.

The LM4667 has high efficiency with an 8Ω transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a 100mW power level is 74%, reaching 84% at 450mW output power.

The LM4667 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).

The LM4667 has fixed selectable gain of either 6dB or 12dB. The LM4667 has short circuit protection against a short from the outputs to VDD, GND, or across the outputs.

The LM4667 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The LM4667 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4667 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is capable of driving 8Ω transducer loads at a continuous average output of 450mW with less than 1%THD+N. Its flexible power supply requirements allow operation from 2.7V to 5.5V.

The LM4667 has high efficiency with an 8Ω transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a 100mW power level is 74%, reaching 84% at 450mW output power.

The LM4667 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).

The LM4667 has fixed selectable gain of either 6dB or 12dB. The LM4667 has short circuit protection against a short from the outputs to VDD, GND, or across the outputs.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM4667  Filterless High Efficiency 1.3W Switching Audio Amplifier 数据表 (Rev. C) 2013年 5月 2日

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DSBGA (YZR) 9 查看选项
VSSOP (DGS) 10 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 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
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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