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參數資料
| 型號： | TPA2036D1YZFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封裝： | 1.45 X 1.45 MM, LEAD FREE, BGA-9 |
| 文件頁數： | 13/24頁 |
| 文件大小： | 743K |
| 代理商： | TPA2036D1YZFT |
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
SLOS589 – OCTOBER 2008.............................................................................................................................................................................................. www.ti.com
The maximum efficiency of the TPA2036D1 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 TPA2036D1 without an output filter if the traces from amplifier to speaker are short. The TPA2036D1
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 37. Typical Ferrite Chip Bead Filter (Chip bead example: TDK: MPZ1608S221A)
Figure 38. Typical LC Output Filter, Cutoff Frequency of 27 kHz
20
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPA2036D1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA2036D1YZFT | 制造商:Texas Instruments 功能描述:2.5-W Mono Class-D Audio Power Amplifier |
| TPA2037D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Class-D Audio Power Amplifier With 6-dB Gain and Auto Short-Circuit Recovery |
| TPA2037D1YFFEVM | 功能描述:音頻 IC 開發工具 TPA2037D1YFFEVM Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA2037D1YFFR | 功能描述:音頻放大器 Fixed Gain 3.2 W Mono Class-D 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 |
| TPA2037D1YFFT | 功能描述:音頻放大器 Fixed Gain 3.2 W Mono Class-D 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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