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參數(shù)資料
| 型號： | TDA7563BPD |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | rohs compliant, POWER, SOP-36 |
| 文件頁數(shù)： | 13/33頁 |
| 文件大?。?/td> | 465K |
| 代理商： | TDA7563BPD |
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Thermal protection
TDA7563B
Doc ID 12733 Rev 3
6
Thermal protection
Thermal protection is implemented through thermal foldback (Figure 28).
Thermal foldback begins limiting the audio input to the amplifier stage as the junction
temperatures rise above the normal operating range. This effectively limits the output power
capability of the device thus reducing the temperature to acceptable levels without totally
interrupting the operation of the device.
The output power will decrease to the point at which thermal equilibrium is reached.
Thermal equilibrium will be reached when the reduction in output power reduces the
dissipated power such that the die temperature falls below the thermal foldback threshold.
Should the device cool, the audio level will increase until a new thermal equilibrium is
reached or the amplifier reaches full power. Thermal foldback will reduce the audio output
level in a linear manner.
Three thermal warning are available through the I2C bus data.
Figure 28. Thermal foldback diagram
6.1
Fast muting
The muting time can be shortened to less than 1.5 ms by setting (IB2) D5 = 1. This option
can be useful in transient battery situations (i.e. during car engine cranking) to quickly
turnoff the amplifier for avoiding any audible effects caused by noise/transients being
injected by preamp stages. The bit must be set back to “0” shortly after the mute transition.
Tj ( °C)
TH. SH.
START
TH. SH.
END
Vout
TH. WARN.
ON
Tj ( °C)
Vout
Tj ( °C)
SD
(with same input
signal)
< TSD
CD out
TH. WARN.
ON
TH. WARN.
ON
125°
140°
155°
> T
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7563B | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM27 |
| TDA7563PDTR | 46 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7563PD | 46 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7563 | 46 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM27 |
| TDA7564BH | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7563BPDTR | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D 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 |
| TDA7563H | 制造商:STMicroelectronics 功能描述: |
| TDA7563PD | 功能描述:音頻放大器 MULTIFUNCTION QUAD Pwr 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 |
| TDA7563PDTR | 功能描述:音頻放大器 MULTIFUNCTION QUAD Pwr 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 |
| TDA7564 | 功能描述:音頻放大器 Quad Power Amplifier 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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