參數(shù)資料
型號(hào)： TPA2006D1DRB
廠商： Texas Instruments, Inc.
英文描述： 1.45-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER WITH 1.8-V COMPATIBLE INPUT THRESHOLDS
中文描述： 1.45單聲道無(wú)濾波器D類音頻功率放大器，1.8 - V兼容輸入閾值
文件頁(yè)數(shù)： 17/23頁(yè)
文件大?。?/td> 750K
代理商： TPA2006D1DRB
www.ti.com
Effects of Applying a Square Wave Into a Speaker
PSPKR
PSUP–PSUP THEORETICAL(at max output power)
PSUP
POUT
1
MEASURED
THEORETICAL
RL
RL
(19)
PSPKR
–
PSUP THEORETICAL
POUT
(at max output power)
(20)
PSPKR
POUT
1
(at max output power)
(21)
THEORETICAL
2rDS(on)
(at max output power)
(22)
TPA2006D1
SLOS498–SEPTEMBER 2006
If the amplitude of a square wave is high enough and the frequency of the square wave is within the bandwidth
of the speaker, a square wave could cause the voice coil to jump out of the air gap and/or scar the voice coil. A
250-kHz switching frequency, however, is not significant because the speaker cone movement is proportional to
1/f
2
for frequencies beyond the audio band. Therefore, the amount of cone movement at the switching frequency
is very small. However, damage could occur to the speaker if the voice coil is not designed to handle the
additional power. To size the speaker for added power, the ripple current dissipated in the load needs to be
calculated by subtracting the theoretical supplied power, P
SUP THEORETICAL
, from the actual supply power, P
SUP
, at
maximum output power, P
OUT
. The switching power dissipated in the speaker is the inverse of the measured
efficiency,
η
MEASURED
, minus the theoretical efficiency,
η
THEORETICAL
.
The maximum efficiency of the TPA2006D1 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.
17
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參數(shù)描述
TPA2006D1DRBR 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio 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
TPA2006D1DRBRG4 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio 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
TPA2006D1DRBT 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio 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
TPA2006D1DRBTG4 功能描述:音頻放大器 1.45W Mono Fil-Free Class-D Audio 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
TPA2006D1EVM 功能描述:音頻 IC 開(kāi)發(fā)工具 AUD POWER AMP RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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