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參數資料
| 型號： | TPA005D02DCAR |
| 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： | 9/25頁 |
| 文件大小： | 373K |
| 代理商： | TPA005D02DCAR |
TPA005D02
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS227C – AUGUST 1998 – REVISED MARCH 2000
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
losses in a real-world class D amplifier
Losses make class D amplifiers nonideal, and reduce the efficiency below 100%. These losses are due to the
output transistors having a nonzero RDS(on), and rise and fall times that are greater than zero.
The loss due to a nonzero RDS(on) is called conduction loss, and is the power lost in the output transistors at
nonswitching times, when the transistor is ON (saturated). Any RDS(on) above 0 causes conduction loss.
Figure 17 shows an H-bridge output circuit simplified for conduction loss analysis and can be used to determine
new efficiencies with conduction losses included.
VDD = 5 V
RL
4
0.31
0.31
RDS(on)
RDS(off)
RDS(on)
5 M
5 M
Figure 17. Output Transistor Simplification for Conduction Loss Calculation
The power supplied, PSUP, is determined to be the power output to the load plus the power lost in the transistors,
assuming that there are always two transistors on.
Efficiency
+ h +
I2R
L
I2 2R
DS(on) )
I2R
L
Efficiency
+ h +
P
L
P
SUP
Efficiency
+ h +
R
L
2R
DS(on) )
R
L
Efficiency
+ h + 95% at all output levels R
DS(on) +
0.1, R
L +
4
Efficiency
+ h + 87% at all output levels R
DS(on) +
0.31, R
L +
4
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA005D12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA005D12DCA | 功能描述:音頻放大器 2W Stereo P RoHS:否 制造商:STMicroelectronics 產品: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 |
| TPA005D12DCAR | 制造商:Rochester Electronics LLC 功能描述:CLASS-D STEREO AUDIO POWER AMPLIFIER - Bulk |
| TPA005D14 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA005D14DCA | 功能描述:音頻放大器 2W Stereo P RoHS:否 制造商:STMicroelectronics 產品: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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