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參數(shù)資料
| 型號： | TMPA420DS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 15W/Ch STEREO CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 15W/Ch立體聲D類音頻功率放大器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 348K |
| 代理商： | TMPA420DS |
Preliminary
www.taimec.com.tw
/
www.class-d.com.tw
TMPA420DS
Rev.3.0 August 15, 2007
t
ai'mec
1-e
-t/RC
=0.5
or
e
-t/RC
=0.5
that is
t = - RC In
（
0.5
）
=
（
320k
×
1u
）（
0.693
）
= 0.22 seconds
Copyright
2005,Tai-1 Microelectronics Corp.
8
Differential input VS single ended input
Differential input offers better noise immunity over single ended input. A differential input
amplifier suppresses common noise and amplifies the difference voltage at the inputs. For
single ended applications just tie the negative input end of the balanced input structure to
ground. If external input resistors are used, the negative input has to be grounded with a
series resistor of the same value as the positive input to reduce common noise.
Voltage gain
The voltage gain can be set through gain0/gain1 control or by external input resistors
connecting to input pins. If external resistors are used they should be well matched. Well
matched resistors are also required even for single ended input configuration for low noise.
Suppose the external input resistors Rext are used then the voltage gain is roughly
Av=750k ohms / (Rext+15k ohms) for gain0=gain1=High
Where 15k ohms is the internal resistance of the input pins. For other gain0/gain1 states
please refer to DC CHARACTERISTICS for different input resistance.
Input filter
AC coupling capacitors are required to block the DC voltage from the device. They also define
the
–
3db frequency at the low frequency side.
The
–
3db frequency of the low frequency side is
f-3db = 1/ (2
π
R C)
where C is the AC coupling capacitance and R is the total resistance in series with C.
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|---|---|
| TMPA421DS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:15W + 6W x2 2.1 Channel CLASS-D AUDIO POWER AMPLIFIER |
| TMPA8700CHF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TMPA8700CHN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TMPA8700CKF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TMPA8700CKN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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