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參數(shù)資料
| 型號(hào)： | TPA0172PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數(shù)： | 8/36頁 |
| 文件大小： | 885K |
| 代理商： | TPA0172PWPR |
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TPA0172
2W STEREO AUDIO POWER AMPLIFIER
WITH I2C BUS
SLOS327C AUGUST 2000 REVISED MAY 2001
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output coupling capacitor, CC (continued)
Table 1. Common Load Impedances vs Low Frequency Output Characteristics in SE Mode
RL
CC
LOWEST FREQUENCY
3
330
F
161 Hz
4
330
F
120 Hz
8
330
F
60 Hz
32
330
F
15 Hz
10,000
330
F
0.05 Hz
47,000
330
F
0.01 Hz
As Table 1 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.
using low-ESR capacitors
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.
bridged-tied load versus single-ended mode
Figure 22 shows a linear audio power amplifier (APA) in a bridged-tied load (BTL) configuration. The TPA0172
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
× VO(PP) into the
power equation, where voltage is squared, yields 4
× the output power from the same supply rail and load
impedance (see equation 5).
Power
+
V
(rms)
2
R
L
(5)
V
(rms) +
V
O(PP)
22
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0172PWPRG4 | 功能描述:音頻放大器 Stereo Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA02 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Operational Amplifier |
| TPA0202 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER |
| TPA0202PWP | 功能描述:音頻放大器 2W Stereo A RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA0202PWPG4 | 功能描述:音頻放大器 2W Stereo A RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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