- 您現在的位置：買賣IC網 > PDF目錄98267 > TPA005D14DCAR (TEXAS INSTRUMENTS INC) 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 PDF資料下載
參數資料
| 型號： | TPA005D14DCAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| 封裝： | PLASTIC, HTSSOP-48 |
| 文件頁數： | 16/30頁 |
| 文件大?。?/td> | 492K |
| 代理商： | TPA005D14DCAR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
class-D effect on power supply (continued)
There is a minor power supply savings with a class-D amplifier versus a linear amplifier when amplifying sine
waves. The difference is much larger when the amplifier is used strictly for music. This is because music has
much lower RMS output power levels, given the same peak output power (Figure 27); and although linear
devices are relatively efficient at high RMS output levels, they are very inefficient at mid-to-low RMS power
levels. The standard method of comparing the peak power to RMS power for a given signal is crest factor, whose
equation is shown below. The lower RMS power for a set peak power results in a higher crest factor
Crest Factor
+ 10 log
P
PK
Prms
Time
PPK
Power
PRMS
Figure 27. Audio Signal Showing Peak and RMS Power
Figure 28 is a comparison of a 5-V class-D amplifier to a similar linear amplifier playing music that has a 13.76-dB
crest factor. From the plot, the power supply draw from a stereo amplifier that is playing music with a 13.76 dB
crest factor is 1.02 W, while a class-D amplifier draws 420 mW under the same conditions. This means that just
under 2.5 times the power supply is required for a linear amplifier over a class-D amplifier.
600
500
300
200
100
0
400
1
1.5
2
2.5
Power
Supplied
(mW)
POWER SUPPLIED
vs
PEAK OUTPUT VOLTAGE AND PEAK OUTPUT POWER
4
4.5
3
3.5
0.25
0.56
1
1.56
4
5.06
2.25
3.06
Peak Output Voltage (V)
Peak Output Power (W)
TPA0202
TPA005D14
Figure 28. Audio Signal Showing Peak and RMS Power (With Music Applied)
相關PDF資料 |
PDF描述 |
|---|---|
| TPA005D14DCA | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| TPA0102PWP | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TPA0102PWPLE | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TPA0102PWPR | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TPA0102PWPRG4 | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA00NBNF10 | 制造商:GREATECS 制造商全稱:GREATECS 功能描述:SPST SMT Tactile Switches with LED |
| TPA00NBNG10 | 制造商:GREATECS 制造商全稱:GREATECS 功能描述:SPST SMT Tactile Switches with LED |
| TPA00NBRB10 | 制造商:GREATECS 制造商全稱:GREATECS 功能描述:SPST SMT Tactile Switches with LED |
| TPA00NBRF10 | 制造商:GREATECS 制造商全稱:GREATECS 功能描述:SPST SMT Tactile Switches with LED |
| TPA00NBRG10 | 制造商:GREATECS 制造商全稱:GREATECS 功能描述:SPST SMT Tactile Switches with LED |
發布緊急采購，3分鐘左右您將得到回復。