- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98195 > TDA7385 (STMICROELECTRONICS) 35 W, 4 CHANNEL, AUDIO AMPLIFIER, PZIP25 PDF資料下載
參數(shù)資料
| 型號： | TDA7385 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 35 W, 4 CHANNEL, AUDIO AMPLIFIER, PZIP25 |
| 封裝： | FLEXIWATT-25 |
| 文件頁數(shù)： | 4/17頁 |
| 文件大?。?/td> | 427K |
| 代理商： | TDA7385 |
Application hints
TDA7385
3.3
Standby and muting
Standby and muting facilities are both 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 10 A normally flows out of pin 22, 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 22 may rise
to above the 1.5 V threshold voltage and the device will consequently fail to turn OFF when
the mute line is brought down.
About the stand-by, the time constant to be assigned in order to obtain a virtually pop-free
transition has to be slower than 2.5V/ms.
3.4
Diagnostics facility
The TDA7385 is equipped with a diagnostics circuitry able to detect the following events:
●
Clipping in the output stage
●
overheating (thermal shut-down proximity)
●
Output misconnections (OUT-GND and OUT-VS shorts)
Diagnostics information is available across an open collector output located at pin 25
(Figure 15) through a current sinking whenever at least one of the above events is
recognized.
Figure 15.
Diagnostics circuit.
Among them, the Clipping Detector acts in a way to output a signal as soon as one or
more power transistors start being saturated.
As a result, the clipping-related signal at pin 25 takes the form of pulses, which are perfectly
synchronized with each single clipping event in the music program and reflect the same
duration time (Figure 16). Applications making use of this facility usually operate a
filtering/integration of the pulses train through passive R-C networks and realize a volume
(or tone bass) stepping down in association with microprocessor-driven audioprocessors.
The maximum load that pin 25 can sustain is 1 k
Ω.
Due to its operating principles, the clipping detector has to be viewed mainly as a power-
dependent feature rather than frequency-dependent. This means that clipping state will be
immediately signaled out whenever a fixed power level is reached, regardless of the audio
VREF
R
Vpin 25
25
D95AU303
TDA7385
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7388A | 27 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
| TDA7388 | 26 W, 1 CHANNEL, AUDIO AMPLIFIER, PZIP25 |
| TDA7389A | 28 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
| TDA7389 | 28 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| TDA7396 | 45 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7385H | 功能描述:音頻放大器 Car-Radio Amplifier 18V Op 28V DC 36W 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 |
| TDA7386 | 功能描述:音頻放大器 4X40W Quad Brdg 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 |
| TDA7386_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 x 45W quad bridge car radio amplifier |
| TDA7387 | 功能描述:音頻放大器 Car-Radio Amplifier 18V Op 28V DC 36W 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 |
| TDA7387EP | 制造商:STMicroelectronics 功能描述:SADA_(REG)4X42W QUAD BRIDGE CAR RADIO AMPLIFIER 制造商:STMicroelectronics 功能描述:4x41W quad BTL output car radio amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。