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参数资料
| 型号： | LM4884MH/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封装： | TSSOP-20 |
| 文件页数： | 17/22页 |
| 文件大小： | 1189K |
| 代理商： | LM4884MH/NOPB |
Electrical Characteristics for LM4884 (Notes 2, 8) (Continued)
Note 1: An LM4884MH that has been properly mounted to a circuit board with a copper heatsink area of at least 2in2 will deliver 1.9W into 4
or 2.1W into 3.
Note 2: All voltages are measured with respect to the GND pin unless other wise specified.
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions that
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,
θJA, and the ambient temperature, TA. The maximum
allowable power dissipation is PDMAX =(TJMAX -TA/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4884, see power derating
currents for more information.
Note 5: Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 6: Machine Model, 220pF-240pF discharged through all pins.
Note 7: The given
θJA is for an LM4884 packaged in an MXA20A with the exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper. When
driving 4
loads from a 5V supply, the LM4884MH must be mounted to the circuit board and its exposed-DAP soldered to an exposed 2in2 area of 1oz PCB copper.
Note 8: Typicals are measured at 25C and represent the parametric norm.
Note 9: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10: Datasheet minimum and maximum specification limits are guaranteed by design, test, or statistical analysis.
Note 11: Output power is measured at the amplifier’s package pins.
Note 12: When driving 3
or 4 loads and operating on a 5V supply, the LM4884MH must be mounted to a circuit board that has a minimum of 2in2 of exposed,
uninterrupted copper area connected to the MH package’s exposed DAP.
External Components Description
See Figure 1.
Components
Functional Description
1.
C
i
The input coupling capacitor blocks DC voltage at the amplifier’s inverting input terminals. C
i, along with the
LM4884’s variable input resistance R
1 (See Table 1), creates a highpass filter with fC = 1/(2
πR
iCi). Both
inverting and noninverting inputs require a C
i. Refer to the Application Information section, SELECTING
EXTERNAL COMPONENTS, for an explanation of determining the value of C
i.
2.
C
S
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about
properly placing, and selecting the value of, this capacitor.
3.
C
B
The capacitor, C
B, filters the half-supply voltage present on the BYPASS pin. Refer to the Application
Information section, SELECTING EXTERNAL COMPONENTS, for information concerning proper placement
and selecting C
B’s value.
LM4884
www.national.com
4
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相关代理商/技术参数 |
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|---|---|
| LM4884MHX/NOPB | 功能描述:IC AMP AUDIO 2.6W STER 20TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM48860 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier |
| LM48860TL | 制造商:Texas Instruments 功能描述:Audio Amp Headphone 2-CH Stereo 0.05W Class-AB 12-Pin Micro SMD T/R 制造商:Texas Instruments 功能描述:CLASS D AMP, STERO, 0.04W, 12MICRO |
| LM48860TL/NOPB | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LM48860TLBD | 功能描述:音频 IC 开发工具 LM48860TL EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
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