參數(shù)資料
型號(hào)： TDA8932TW
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 音頻／視頻放大
英文描述： 25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32
封裝： 6.10 MM, 0.65 MM PITCH, PLASTIC, MO-153, SOT549-1, HTSSOP-32
文件頁(yè)數(shù)： 22/45頁(yè)
文件大?。?/td> 285K
代理商： TDA8932TW
TDA8932_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 — 11 May 2006
29 of 45
Philips Semiconductors
TDA8932
Class-D audio amplier
Example 2
In case of music output power at 25 % of the rated power, the Tj(max) is much lower.
At VP = 30 V and Po =2 × (0.25 × 15) = 2 × 3.75 W into 8 , the power dissipation
P = 1.6 W at Po = 3.75 W (see Figure 21)
Rth(j-a) =43K/W
The maximum junction temperature Tj(max) = 25 + 1.6 × 43 = 93.8 °C.
14.8 Pumping effects
When the amplier is used in a SE conguration, a so-called 'pumping effect' can occur.
During one switching interval, energy is taken from one supply (e.g. VDDP1), while a part of
that energy is delivered back to the other supply line (e.g. VSSP1) and visa versa. When
the power supply cannot sink energy, the voltage across the output capacitors of that
power supply will increase.
The voltage increase caused by the pumping effect depends on:
Speaker impedance
Supply voltage
Audio signal frequency
Value of decoupling capacitors on supply lines
Source and sink currents of other channels
The pumping effect should not cause a malfunction of either the audio amplier and/or the
power supply. For instance, this malfunction can be caused by triggering of the
undervoltage or overvoltage protection of the amplier.
Pumping effects in a SE conguration can be minimized by connecting audio inputs in
anti-phase and change the polarity of one speaker. This is illustrated in Figure 13.
Fig 13. SE application for reducing pumping effects
001aad763
IN1P
OUT1
audio
in1
IN1N
IN2N
audio
in2
IN2P
OUT2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8933 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Class-D audio amplifier
TDA8933B 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Class D audio amplifier
TDA8933BTW 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Class D audio amplifier
TDA8933BTW/N2,112 功能描述:音頻放大器 Class D audio amplifier 32 leads RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDA8933BTW/N2,118 功能描述:音頻放大器 Class D audio amplifier 32 leads RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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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