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參數資料
| 型號： | TPA032D04DCARG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| 封裝： | PLASTIC, HTSSOP-48 |
| 文件頁數： | 10/26頁 |
| 文件大小： | 439K |
| 代理商： | TPA032D04DCARG4 |
TPA032D04
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS203B DECEMBER 1999 REVISED JUNE 2000
19
TI.COM
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 (see Figure 11); 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 11. Audio Signal Showing Peak and RMS Power
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| TPA032D04EVM | 制造商:Texas Instruments 功能描述:EVAL KIT FOR 10-W STEREO CLS-D AUD PWR AMP - Bulk |
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