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參數(shù)資料
| 型號： | TDA7293V |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| 封裝： | MULTIWATT-15 |
| 文件頁數(shù)： | 20/21頁 |
| 文件大?。?/td> | 397K |
| 代理商： | TDA7293V |
Circuit description
TDA7293
8/21
Doc ID 6744 Rev 8
While a linearization of the DC transfer characteristic of the stage is obtained, the dynamic
behaviour of the system must be taken into account.
A significant aid in keeping the distortion contributed by the final stage as low as possible is
provided by the compensation scheme, which exploits the direct connection of the Miller
capacitor at the amplifier’s output to introduce a local AC feedback path enclosing the output
stage itself.
3.2
Protection
In designing a power IC, particular attention must be reserved to the circuits devoted to
protection of the device from short circuit or overload conditions. Due to the absence of the
2nd breakdown phenomenon, the SOA of the power DMOS transistors is delimited only by a
maximum dissipation curve dependent on the duration of the applied stimulus.
In order to fully exploit the capabilities of the power transistors, the protection scheme
implemented in this device combines a conventional SOA protection circuit with a novel local
temperature sensing technique which " dynamically" controls the maximum dissipation.
In addition to the overload protection described above, the device features a thermal
shutdown circuit which initially puts the device into a muting state (@ T
= 150 °C) and then
into stand-by (@ Tj = 160 °C).
Full protection against electrostatic discharges on very pin is included.
3.3
Other Features
The device is provided with both standby and mute functions, independently driven by two
CMOS logic compatible input pins.
The circuits dedicated to the switching on and off of the amplifier have been carefully
optimized to avoid any kind of uncontrolled audible transient at the output.
The sequence that we recommend during the on/off transients is shown in Figure 8. The
application of figure 9 shows the possibility of sing only one command for both st-by and
mute functions. On both the pins, the maximum applicable range corresponds to the
operating supply voltage.
相關PDF資料 |
PDF描述 |
|---|---|
| TDA7293HS | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7294V | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7294HS | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7295S | 80 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7295 | 80 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7293V | 制造商:STMicroelectronics 功能描述:Audio Power Amplifier IC |
| TDA7294 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY |
| TDA7294_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY |
| TDA7294HS | 功能描述:音頻放大器 100V, 100W DMOS AMP Up to 40V Mute STDBY 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7294-HS | 制造商:STMicroelectronics 功能描述:TDA7294-HS - Bulk |
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