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LM4666

現行

具可選增益的 1.2-W 立體聲道類比輸入 D 類音訊放大器

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產品規格表

LM4666

現行
產品規格表 立即訂購

產品詳細資料

Audio input type Analog Input Architecture Class-D Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.8 Load (min) (Ω) 4 Output power (W) 1.2 SNR (dB) 83 THD + N at 1 kHz (%) 0.65 Iq (typ) (mA) 15 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.8 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) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.8 Load (min) (Ω) 4 Output power (W) 1.2 SNR (dB) 83 THD + N at 1 kHz (%) 0.65 Iq (typ) (mA) 15 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.8 Analog supply voltage (max) (V) 5.5 PSRR (dB) 65 Operating temperature range (°C) -40 to 85
WSON (NHK) 14 12 mm² 4 x 3
  • No Output Filter Required for Inductive Transducers
  • Selectable Gain of 6dB or 12dB
  • Very Fast Turn On Time: 6ms (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Short Circuit Protection
  • Available in Space-Saving NHK0014A Package

Key Specifications

  • Efficiency at 3V, 100mW into 8Ω Transducer: 79% (typ)
  • Efficiency at 3V, 450mW into 8Ω Transducer: 84% (typ)
  • Efficiency at 5V, 1W into 8Ω Transducer: 85% (typ)
  • Total Quiescent Power Supply Current: 7.0mA (typ)
  • Total Shutdown Power Supply Current: 0.02µA (typ)
  • Single supply range: 2.8V 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: 6ms (typ)
  • Minimum External Components
  • "Click and Pop" Suppression Circuitry
  • Micro-Power Shutdown Mode
  • Short Circuit Protection
  • Available in Space-Saving NHK0014A Package

Key Specifications

  • Efficiency at 3V, 100mW into 8Ω Transducer: 79% (typ)
  • Efficiency at 3V, 450mW into 8Ω Transducer: 84% (typ)
  • Efficiency at 5V, 1W into 8Ω Transducer: 85% (typ)
  • Total Quiescent Power Supply Current: 7.0mA (typ)
  • Total Shutdown Power Supply Current: 0.02µA (typ)
  • Single supply range: 2.8V to 5.5V

All trademarks are the property of their respective owners.

The LM4666 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 LM4666 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4666 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 2.8V to 5.5V.

The LM4666 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 79%, reaching 84% at 450mW output power.

The LM4666 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).

The LM4666 has fixed selectable gain of either 6dB or 12dB. The LM4666 has short circuit protection against a short from the outputs to VDD or GND.

The LM4666 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 LM4666 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4666 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 2.8V to 5.5V.

The LM4666 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 79%, reaching 84% at 450mW output power.

The LM4666 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).

The LM4666 has fixed selectable gain of either 6dB or 12dB. The LM4666 has short circuit protection against a short from the outputs to VDD or GND.
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類型 標題 日期
* Data sheet LM4666  Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier datasheet (Rev. A) 2013年 5月 2日
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 2019年 8月 26日
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) 2019年 6月 27日
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) 2013年 5月 1日

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LM4666SD Design Package

SNAC017.ZIP (316 KB)
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