參數(shù)資料
型號(hào)： LM4671
廠商： National Semiconductor Corporation
元件分類： 音頻放大器
英文描述： Filterless High Efficiency 2.5W Switching Audio Amplifier
中文描述： 濾波2.5W的高效率開關(guān)音頻放大器
文件頁(yè)數(shù)： 5/18頁(yè)
文件大?。?/td> 969K
代理商： LM4671
Note 1:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2:
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 andAC electrical specifications under particular test conditions which
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 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4671, T
JMAX
= 150C.
The typical
θ
JA
is 220C/W for the microSMD package.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF–240pF discharged through all pins.
Note 6:
Typical specifications are specified at 25C and represent the parametric norm.
Note 7:
Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
Shutdown current is measured in a normal room environment. Exposure to direct sunlight will increase I
SD
by a maximum of 2μA. The Shutdown pin should
be driven as close as possible to GND for minimal shutdown current and to V
DD
for the best THD performance in PLAY mode. See the
Application Information
section under SHUTDOWN FUNCTION for more information.
Note 10:
The performance graphs were taken using the Audio Precision AUX-0025 Switching Amplifier measurement Filter in series with the LC filter on the demo
board.
External Components Description
(
Figure 1
)
Components
1.
Functional Description
C
S
Supply bypass capacitor which provides power supply filtering. Refer to the
Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Input AC coupling capacitor which blocks the DC voltage at the amplifier’s input terminals.
2.
C
I
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4671_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Filterless High Efficiency 2.5W Switching Audio Amplifier
LM4671_08 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Filterless High Efficiency 2.5W Switching Audio Amplifier
LM4671ITL 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 2.5W Class-AB 9-Pin uSMD T/R 制造商:Texas Instruments 功能描述:IC AMP FILTERLESS 2.5W SMD 4671
LM4671ITL/NOPB 功能描述:音頻放大器 Filterless Hi Eff 2.5W Swtch Audio Amp 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
LM4671ITLBD 功能描述:BOARD EVALUATION LM4671ITL RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:-
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