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參數(shù)資料
| 型號： | TPA6021A4NE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS001-AD, DIP-20 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 1823K |
| 代理商： | TPA6021A4NE4 |
www.ti.com
USING LOW-ESR CAPACITORS
BRIDGE-TIED LOAD vs SINGLE-ENDED LOAD
Power +
V
(rms)
2
R
L
V
(rms) +
V
O(PP)
2 2
(5)
RL
2x VO(PP)
VO(PP)
-VO(PP)
VDD
TPA6021A4
SLOS465 – JUNE 2005
As Table 2 indicates, most of the bass response is attenuated into a 4-
load, an 8- load is adequate,
headphone response is good, and drive into line level inputs (a home stereo for example) is exceptional.
Low-ESR capacitors are recommended throughout this applications section. A real (as opposed to ideal)
capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this
resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this
resistance, the more the real capacitor behaves like an ideal capacitor.
Figure 26 shows a Class-AB audio power amplifier (APA) in a BTL configuration. The TPA6021A4 BTL amplifier
consists of two Class-AB amplifiers driving both ends of the load. There are several potential benefits to this
differential drive configuration, but, initially consider power to the load. The differential drive to the speaker
means that as one side is slewing up, the other side is slewing down, and vice versa. This in effect doubles the
voltage swing on the load as compared to a ground referenced load. Plugging 2 x VO(PP) into the power equation,
where voltage is squared, yields 4x the output power from the same supply rail and load impedance (see
Equation 5).
Figure 26. Bridge-Tied Load Configuration
18
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| TPA6030A4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-W Stereo Audio Power Amplifier with Advanced DC Volume Control |
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| TPA6030A4PWPG4 | 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB 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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