- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30754 > LM4875MMX/NOPB (NATIONAL SEMICONDUCTOR CORP) 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | LM4875MMX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8 |
| 封裝： | 0.118 INCH, MSOP-8 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 664K |
| 代理商： | LM4875MMX/NOPB |
Typical Performance Characteristics (Continued)
Application Information
BRIDGE CONFIGURATION EXPLANATION
As shown in
Figure 1, the LM4875 consists of two opera-
tional amplifiers internally. An external DC voltage sets the
closed-loop gain of the first amplifier, whereas two internal
20k
resistors set the second amplifier’s gain at -1. The
LM4875 can be used to drive a speaker connected between
the two amplifier outputs or a monaural headphone con-
nected between V
O1 and GND.
Figure 1 shows that the output of Amp1 serves as the input
to Amp2. This results in both amplifiers producing signals
that are identical in magnitude, but 180 out of phase.
Taking advantage of this phase difference, a load placed
between V
O1 and VO2 is driven differentially (commonly
referred to as “bridge mode“ ). This mode is different from
single-ended driven loads that are connected between a
single amplifier’s output and ground.
Bridge mode has a distinct advantage over the single-ended
configuration: its differential drive to the load doubles the
output swing for a specified supply voltage. This results in
four times the output power when compared to a
single-ended amplifier under the same conditions. This in-
crease in attainable output assumes that the amplifier is not
current limited or the output signal is not clipped. To ensure
minimum output signal clipping when choosing an amplifier’s
closed-loop gain, refer to the Audio Power Amplifier De-
sign section.
THD+N vs Output Power
DS101042-24
THD+N vs Output Power
DS101042-28
Output Power vs Load Resistance
DS101042-29
Clipping Voltage vs Supply Voltage
DS101042-30
Output Power vs Supply Voltage
DS101042-31
Output Power vs Supply Voltage
DS101042-32
Supply Current vs Supply Voltage
DS101042-33
LM4875
www.national.com
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4876MDC | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4876MWC | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| LM4877IBPX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4877IBP/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4878IBPX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4875MX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875MX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4876 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1W Audio Power Amplifier with Logic Low Shutdown |
| LM4876_03 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1W Audio Power Amplifier with Logic Low Shutdown |
| LM4876M | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。