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參數(shù)資料
| 型號： | LM4835MTE |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain |
| 中文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | TSSOP-28 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 648K |
| 代理商： | LM4835MTE |
Application Information
(Continued)
At low frequencies the capacitor will be virtually an open cir-
cuit. At high frequencies the capacitor will be virtually a short
circuit. As a result of this, the gain of the bridge amplifier is
increased at low frequencies.Afirst order pole is formed with
a corner frequency at:
f
c
= 1/(2
π
R
LFE
C
LFE
)
The resulting low frequency differential gain of this bridged
amplifier becomes:
2(R
f
+ R
LFE
) / R
i
= A
vd
With R
= 20k
, R
= 20k
, and C
= 0.068 μF, a first
order pole is formed with a corner frequency of 120 Hz. At
low frequencies the differential gain will be 4, assuming R
S
=
20k
. The low frequency boost formulas assume that C
O
,
C
, f
, f
allow the appropriate low frequency response.
The bass boost feature is enabled/disable by toggling the
logic at pin 3.
DC VOLUME CONTROL
The DC voltage at the DC Volume Control pin (pin 7) deter-
mines the attenuation of output of the amplifiers. If the DC
potential of pin 7 is at 4V (or 80% V
) the internal amplifiers
are set at unity gain. The attenuator range is from 0dB (pin7
= 80% V
) to -81dB (pin7 = 0V). Any DC voltage greater
than 4V (or 80% V
) will result in a gain of unity. When the
mode pin is given a logic low,amplifiers will be fixed at a gain
of unity regardless of the voltage of pin 7. Refer to the
Typi-
cal Performance Characteristics
for detailed information of
the attenuation characteristics of the DC Volume Control pin.
DS100139-11
FIGURE 5. Low Frequency Enhancement
www.national.com
13
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM4835MTE/NOPB | 功能描述:IC AMP AUDIO PWR 2.2W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4835MTEX/NOPB | 功能描述:IC AMP AUDIO PWR 2.2W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4835MTX | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4835MTX/HALF | 功能描述:IC AMP AUDIO PWR 2.2W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 標準包裝:80 系列:- 類型:AB 類 輸出類型:1-通道（單聲道） 在某負載時最大輸出功率 x 通道數(shù)量:1.25W x 1 @ 8 歐姆 電源電壓:2.5 V ~ 5.5 V 特點:消除爆音，差分輸入，關閉，熱保護 安裝類型:表面貼裝 供應商設備封裝:8-MSOP-PowerPad 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:管件 配用:296-31419-ND - EVAL MODULE FOR TPA6205A1 其它名稱:296-34563-5TPA6205A1DGN-ND |
| LM4835MTX/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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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