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LM49250

生産中止品

2.4-W, mono, analog input Class-AB audio amplifier with 45-mW stereo & mono earpiece driver

ご注文はこちら
データシート

LM49250

生産中止品
データシート ご注文はこちら

製品詳細

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) 2.7 Load (min) (Ω) 4 Output power (W) 1.23 THD + N at 1 kHz (%) 0.015 Iq (typ) (mA) 5.6 Control interface I2C Closed/open loop Open Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 95 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) 2.7 Load (min) (Ω) 4 Output power (W) 1.23 THD + N at 1 kHz (%) 0.015 Iq (typ) (mA) 5.6 Control interface I2C Closed/open loop Open Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 PSRR (dB) 95 Operating temperature range (°C) -40 to 85
DSBGA (YPG) 36 10.5625 mm² 3.25 x 3.25
  • Output Short Circuit Protection
  • Thermal Overload Protection
  • Stereo Filterless Class D Operation
  • Spread Spectrum Modulation
  • Ground Referenced Headphone Drivers
  • I2C Control Interface
  • 32-Step Input Volume Control
  • Output Volume Control
  • Minimum External Components
  • Click and Pop Suppression
  • Micro-Power Shutdown
  • Available in Space-Saving 36–Bump DSBGA Package
  • Single Supply Operation
  • RF Suppression

Key Specifications

  • Power Output at VDD = 5V Speaker:
    • RL = 4Ω, THD+N ≤ 1%: 1.97W/Ch
    • RL = 4Ω, THD+N ≤ 10%: 2.4W/Ch
    • RL =8Ω, THD+N ≤ 1%: 1.2W/Ch
  • Headphone:
    • RL = 16Ω, THD+N ≤ 1%: 41mW/Ch
    • RL = 32Ω, THD+N ≤ 1%: 45mW/Ch
  • Earpiece:
    • RL = 16Ω, THD+N ≤ 1%: 170mW
    • RL = 32Ω, THD+N ≤ 1%: 90mW
  • Shutdown Current: 0.1μA
  • Efficiency at 5V, 1W into 8Ω: 87%
  • Efficiency at 3.6V, 500mW into 8Ω: 85%

All trademarks are the property of their respective owners.

  • Output Short Circuit Protection
  • Thermal Overload Protection
  • Stereo Filterless Class D Operation
  • Spread Spectrum Modulation
  • Ground Referenced Headphone Drivers
  • I2C Control Interface
  • 32-Step Input Volume Control
  • Output Volume Control
  • Minimum External Components
  • Click and Pop Suppression
  • Micro-Power Shutdown
  • Available in Space-Saving 36–Bump DSBGA Package
  • Single Supply Operation
  • RF Suppression

Key Specifications

  • Power Output at VDD = 5V Speaker:
    • RL = 4Ω, THD+N ≤ 1%: 1.97W/Ch
    • RL = 4Ω, THD+N ≤ 10%: 2.4W/Ch
    • RL =8Ω, THD+N ≤ 1%: 1.2W/Ch
  • Headphone:
    • RL = 16Ω, THD+N ≤ 1%: 41mW/Ch
    • RL = 32Ω, THD+N ≤ 1%: 45mW/Ch
  • Earpiece:
    • RL = 16Ω, THD+N ≤ 1%: 170mW
    • RL = 32Ω, THD+N ≤ 1%: 90mW
  • Shutdown Current: 0.1μA
  • Efficiency at 5V, 1W into 8Ω: 87%
  • Efficiency at 3.6V, 500mW into 8Ω: 85%

All trademarks are the property of their respective owners.

The LM49250 is a fully integrated audio subsystem designed for stereo cell phone applications. The LM49250 combines a 2.4W/Ch stereo class D speaker amplifiers with a 45mW/Ch stereo ground referenced headphone amplifier, a class AB earpiece amplifier, TI 3D enhancement, volume control, and an input mixer into a single device. The filterless class D amplifiers deliver 1.2W/Ch into an 8Ω load with <1% THD+N from a 5V supply.

The LM49250 features a new circuit technology that utilizes a charge pump to generate a negative supply voltage. This allows the headphone outputs to be biased about ground, thereby eliminating the output-coupling capacitors.

For improved noise immunity, the LM49250 features fully differential left, right and mono inputs. The three inputs can be mixed/multiplexed to any output combination of the loudspeaker, headphone or earpiece amplifiers. The left and right differential inputs can be used as separate single-ended inputs, mixing multiple stereo audio sources. The mixer, volume control, and device mode select are controlled through an I2C compatible interface.

Output short circuit and thermal overload protection prevent the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown.

The LM49250 is a fully integrated audio subsystem designed for stereo cell phone applications. The LM49250 combines a 2.4W/Ch stereo class D speaker amplifiers with a 45mW/Ch stereo ground referenced headphone amplifier, a class AB earpiece amplifier, TI 3D enhancement, volume control, and an input mixer into a single device. The filterless class D amplifiers deliver 1.2W/Ch into an 8Ω load with <1% THD+N from a 5V supply.

The LM49250 features a new circuit technology that utilizes a charge pump to generate a negative supply voltage. This allows the headphone outputs to be biased about ground, thereby eliminating the output-coupling capacitors.

For improved noise immunity, the LM49250 features fully differential left, right and mono inputs. The three inputs can be mixed/multiplexed to any output combination of the loudspeaker, headphone or earpiece amplifiers. The left and right differential inputs can be used as separate single-ended inputs, mixing multiple stereo audio sources. The mixer, volume control, and device mode select are controlled through an I2C compatible interface.

Output short circuit and thermal overload protection prevent 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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種類 タイトル 最新の英語版をダウンロード 日付
* データシート Emission Supprssion Stereo Class D Audio w/Gnd Ref Headphone Amp & Mono Earpiece データシート (Rev. C) 2013年 5月 1日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点