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參數(shù)資料
| 型號： | TDA7389 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 28 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| 封裝： | ROHS COMPLIANT, FLEXIWATT-25 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 190K |
| 代理商： | TDA7389 |
TDA7389
Application hints
3
Application hints
Ref. to the circuit of Figure 14.
3.1
SVR
Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF
time sequence and, consequently, plays an essential role in the pop optimization during
ON/OFF transients.
To conveniently serve both needs, its minimum recommended value is 22F, 47F can
be used to optimize pop performances.
3.2
Input stage
The TDA7389’s inputs are ground-compatible and can stand very high input signals (±
8Vpk) without any performances degradation.
If the standard value for the input capacitors (0.1F) is adopted, the low frequency cut-off
will amount to 16 Hz.
The input capacitors should be 1/4 of the capacitor connected to AC-GND pin for optimum
pop performances.
3.3
Standby and muting
Standby and Muting facilities are both 3.3V CMOS-compatible. If unused, a straight
connection to Vs of their respective pins would be admissible.
Conventional/low-power transistors can be employed to drive muting and stand-by pins in
absence of true CMOS ports or microprocessors. R-C cells have always to be used in order
to smooth down the transitions for preventing any audible transient noises.
Since a DC current of about 10A normally flows out of pin 23, the maximum allowable
muting-series resistance (R2) is 70 kΩ, which is sufficiently high to permit a muting capacitor
reasonably small (about 1F).
If R2 is higher than recommended, the involved risk will be that the voltage at pin 23 may rise
to above the 1.2V threshold voltage and the device will consequently fail to turn OFF when
the mute line is brought down.
About the standby, the time constant to be assigned in order to obtain a virtually pop-free
transition has to be slower than 2.5V/ms.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7389A | 功能描述:音頻放大器 6 x 42W Quad Bridge Car-Radio Amplifier 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 |
| TDA7391 | 功能描述:音頻放大器 35W Bridge Amplifier 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 |
| TDA7391LV | 制造商:STMicroelectronics 功能描述:ABD AUDIO & POWER - Rail/Tube |
| TDA7391LVPD | 制造商:STMicroelectronics 功能描述:ABD AUDIO & POWER - Rail/Tube |
| TDA7391PD | 功能描述:音頻放大器 32W Bridge Amplifier 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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