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LM48311

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具有 6dB 固定增益的 2.6W 单声道模拟输入 D 级音频放大器

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LM48311

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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) 2.6 SNR (dB) 97 THD + N at 1 kHz (%) 0.03 Iq (typ) (mA) 3.1 Control interface Hardware 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 Load (min) (Ω) 4 Output power (W) 2.6 SNR (dB) 97 THD + N at 1 kHz (%) 0.03 Iq (typ) (mA) 3.1 Control interface Hardware Analog supply (min) (V) 2.4 Analog supply voltage (max) (V) 5.5 PSRR (dB) 78 Operating temperature range (°C) -40 to 85
DSBGA (YZR) 9 3.0625 mm² 1.75 x 1.75
  • Passes FCC Class B Radiated Emissions with 20 Inches of Cable
  • E2S System Reduces EMI while Preserving Audio Quality and Efficiency
  • Output Short Circuit Protection with Auto-Recovery
  • No output Filter Required
  • Internally Configured Gain (6dB)
  • Low power Shutdown Mode
  • Minimum External Components
  • "Click and Pop" Suppression
  • Micro-Power Shutdown
  • Available in Space-Saving DSBGA Package

Key Specifications

  • Efficiency at 3.6V, 400mW into 8Ω 85% (Typ)
  • Efficiency at 5V, 1W into 8Ω 88% (Typ)
  • Quiescent Power Supply Current at 5V 3.1mA
  • Power Output at VDD = 5V, RL = 4Ω
    • THD+N ≤ 10% 2.6W (Typ)
    • THD+N ≤ 1% 2.1W (Typ)
  • Power Output at VDD = 5V, RL = 8Ω
    • THD+N ≤ 10% 1.6W (Typ)
    • THD+N ≤ 1% 1.3W (Typ)
  •  Shutdown Current 0.01μA (Typ)

Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

  • Passes FCC Class B Radiated Emissions with 20 Inches of Cable
  • E2S System Reduces EMI while Preserving Audio Quality and Efficiency
  • Output Short Circuit Protection with Auto-Recovery
  • No output Filter Required
  • Internally Configured Gain (6dB)
  • Low power Shutdown Mode
  • Minimum External Components
  • "Click and Pop" Suppression
  • Micro-Power Shutdown
  • Available in Space-Saving DSBGA Package

Key Specifications

  • Efficiency at 3.6V, 400mW into 8Ω 85% (Typ)
  • Efficiency at 5V, 1W into 8Ω 88% (Typ)
  • Quiescent Power Supply Current at 5V 3.1mA
  • Power Output at VDD = 5V, RL = 4Ω
    • THD+N ≤ 10% 2.6W (Typ)
    • THD+N ≤ 1% 2.1W (Typ)
  • Power Output at VDD = 5V, RL = 8Ω
    • THD+N ≤ 10% 1.6W (Typ)
    • THD+N ≤ 1% 1.3W (Typ)
  •  Shutdown Current 0.01μA (Typ)

Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LM48311 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48311 features Texas Instruments' Enhanced Emissions Suppression (E2S) system, that features a unique patent-pending ultra low EMI, spread spectrum, PWM architecture, that significantly reduces RF emissions while preserving audio quality and efficiency. The E2S system improves battery life, reduces external component count, board area consumption, system cost, and simplifying design.

The LM48311 is designed to meet the demands of portable multimedia devices. Operating from a single 5V supply, the device is capable of delivering 2.6W of continuous output power to a 4Ω load with less than 10% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48311 features both a spread spectrum modulation scheme, and an advanced, patented edge rate control (ERC) architecture that significantly reduces emissions, while maintaining high quality audio reproduction (THD+N = 0.03%) and high efficiency (η = 88%).

The LM48311 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving and 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO = 1W. The gain of the LM48311 is internally set to 6dB, further reducing external component count. A low power shutdown mode reduces supply current consumption to 0.01µA.

Advanced output short circuit protection with auto-recovery prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown.

The LM48311 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48311 features Texas Instruments' Enhanced Emissions Suppression (E2S) system, that features a unique patent-pending ultra low EMI, spread spectrum, PWM architecture, that significantly reduces RF emissions while preserving audio quality and efficiency. The E2S system improves battery life, reduces external component count, board area consumption, system cost, and simplifying design.

The LM48311 is designed to meet the demands of portable multimedia devices. Operating from a single 5V supply, the device is capable of delivering 2.6W of continuous output power to a 4Ω load with less than 10% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48311 features both a spread spectrum modulation scheme, and an advanced, patented edge rate control (ERC) architecture that significantly reduces emissions, while maintaining high quality audio reproduction (THD+N = 0.03%) and high efficiency (η = 88%).

The LM48311 features high efficiency compared to conventional Class AB amplifiers, and other low EMI Class D amplifiers. When driving and 8Ω speaker from a 5V supply, the device operates with 88% efficiency at PO = 1W. The gain of the LM48311 is internally set to 6dB, further reducing external component count. A low power shutdown mode reduces supply current consumption to 0.01µA.

Advanced output short circuit protection with auto-recovery prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown.

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类型 标题 下载最新的英语版本 日期
* 数据表 Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier with E2S 数据表 (Rev. B) 2013年 5月 1日

设计和开发

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仿真模型

LM48311 TINA-TI Reference Design

SNAM115.TSC (46 KB) - TINA-TI Reference Design
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仿真模型

LM48311 TINA-TI Spice Model

SNAM116.ZIP (17 KB) - TINA-TI Spice Model
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仿真模型

LM48311 Unencrypted PSpice Model Package (Rev. A)

SNAM114A.ZIP (18 KB) - PSpice Model
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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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