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參數(shù)資料
| 型號(hào)： | TPA2031D1YZFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| 封裝： | 1.45 X1.45 MM, LEAD FREE, WCSP-9 |
| 文件頁(yè)數(shù)： | 13/24頁(yè) |
| 文件大小： | 753K |
| 代理商： | TPA2031D1YZFT |
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P
SPKR +
P
SUP
–P
SUP THEORETICAL
(at max output power)
(19)
P
SPKR +
P
SUP
P
OUT
–
P
SUP THEORETICAL
P
OUT
(at max output power)
(20)
P
SPKR +
P
OUT
1
hMEASURED *
1
hTHEORETICAL
(at max output power)
(21)
hTHEORETICAL
+
R
L
R
L )
2r
DS(on)
(at max output power)
(22)
When to Use an Output Filter
1 nF
Ferrite
Chip Bead
OUTP
OUTN
Ferrite
Chip Bead
1 nF
1
F
1
F
33
H
33
H
OUTP
OUTN
SLOS546 – MAY 2008........................................................................................................................................................................................................ www.ti.com
The maximum efficiency of the TPA2031D1 with a 3.6 V supply and an 8-
load is 86% from Equation 22. Using
equation Equation 21 with the efficiency at maximum power (84%), we see that there is an additional 17 mW
dissipated in the speaker. The added power dissipated in the speaker is not an issue as long as it is taken into
account when choosing the speaker.
Design the TPA2031D1 without an output filter if the traces from amplifier to speaker are short. The TPA2031D1
passed FCC and CE radiated emissions with no shielding with speaker trace wires 100 mm long or less.
Wireless handsets and PDAs are great applications for class-D without a filter.
A ferrite bead filter can often be used if the design is failing radiated emissions without an LC filter, and the
frequency sensitive circuit is greater than 1 MHz. This is good for circuits that just have to pass FCC and CE
because FCC and CE only test radiated emissions greater than 30 MHz. If choosing a ferrite bead, choose one
with high impedance at high frequencies, but very low impedance at low frequencies.
Use an LC output filter if there are low frequency (< 1 MHz) EMI sensitive circuits and/or there are long leads
from amplifier to speaker.
Figure 38. Typical Ferrite Chip Bead Filter (Chip bead example: NEC/Tokin: N2012ZPS121)
Figure 39. Typical LC Output Filter, Cutoff Frequency of 27 kHz
20
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPA2031D1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA2031D1YZF | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| TPA2031D1YZFR | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| TPA2032D1YZFR | 2.75 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| TPA2032D1YZF | 2.75 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| TPA2034D1YZFR | 2.75 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA2032D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.75-W FIXED GAIN MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| TPA2032D1YZF | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.75-W FIXED GAIN MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| TPA2032D1YZFR | 功能描述:音頻放大器 2.75W Mon Fully Diff Class-D Aud Amp 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 |
| TPA2032D1YZFT | 功能描述:音頻放大器 2.75W Mon Fully Diff Class-D Aud Amp 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 |
| TPA2033D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.75-W FIXED GAIN MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
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