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參數資料
| 型號： | LM4915LQ/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.4 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC8 |
| 封裝： | LLP-8 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 516K |
| 代理商： | LM4915LQ/NOPB |
LM4915
Pseudo-Differential Mono Headphone Amplifier with
Fixed 6dB Gain
General Description
The LM4915 is a pseudo-differential audio power amplifier
primarily designed for demanding applications in mobile
phones and other portable audio device applications with
mono headphones. It is capable of delivering 90 miliwatts of
continuous average power to a 32
BTL load with less than
1% distortion (THD+N) from a 3V
DC power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4915 does not require output
coupling capacitors or bootstrap capacitors, and therefore is
ideally suited for mobile phone and other low voltage appli-
cations where minimal power consumption is a primary re-
quirement.
The LM4915 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by driving
the shutdown pin low. Additionally, the LM4915 features an
internal thermal shutdown protection mechanism.
The LM4915 contains advanced pop & click circuitry which
virtually eliminates noises which would otherwise occur dur-
ing turn-on and turn-off transitions.
The LM4915 has an internally fixed gain of 6dB.
Key Specifications
n
Improved PSRR at 217Hz and 1kHz
75dB (typ)
n
Power Output at 5.0V & 1% THD into 32
280mW (typ)
n
Power Output at 3.0V & 1% THD into 32
90mW (typ)
n
Output Noise, A-weighted
20V (typ)
Features
n
Pseudo-differential amplification
n
Internal gain-setting resistors
n
Available in space-saving LLP package
n
Ultra low current shutdown mode
n
Can drive capacitive loads up to 500pF
n
Improved pop & click circuitry virtually eliminates noises
during turn-on and turn-off transitions
n
2.2 - 5.5V operation
n
No output coupling capacitors, snubber networks,
bootstrap capacitors or gain-setting resistors required
n
Ultra low noise
Applications
n
Mobile phones
n
PDAs
n
Portable electronics devices
Typical Application
Boomer is a registered trademark of National Semiconductor Corporation.
200482B4
FIGURE 1. Typical Audio Amplifier Application Circuit
May 2003
LM4915
Pseudo-Differential
Mono
Headphone
Amplifier
with
Fixed
6dB
Gain
2003 National Semiconductor Corporation
DS200482
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4915LQX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4915LQX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4916 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier |
| LM4916LD | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4916LD/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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