- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98198 > TDA7854 (STMICROELECTRONICS) 48 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 PDF資料下載
參數(shù)資料
| 型號： | TDA7854 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 48 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| 封裝： | ROHS COMPLIANT, FLEXIWATT-25 |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 170K |
| 代理商： | TDA7854 |
TDA7854
Application hints
4
Application hints
4.1
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 10
μF.
4.2
Input stage
The TDA7854'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 (0.1
μF) is adopted, the low frequency cut-off
will amount to 16 Hz.
4.3
Stand-by and muting
R-C cells have always to be used in order to smooth down the transitions for preventing any
audible transient noise.
About 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.
A direct connection to Vs of these two pins is admissible but a 470kOhm equivalent
resistance should be present between the power supply and muting and stand-by pins.
4.4
Heatsink definition
Under normal usage (4 Ohm speakers) the heatsink's thermal requirements have to be
deduced from Figure 4, which reports the simulated power dissipation when real
music/speech programmes are played out. Noise with gaussian-distributed amplitude was
employed for this simulation. Based on that, frequent clipping occurrence (worst-case) will
cause Pdiss = 26W. Assuming Tamb = 70°C and TCHIP = 150°C as boundary conditions, the
heatsink's thermal resistance should be approximately 2°C/W. This would avoid any thermal
shutdown occurrence even after long-term and full-volume operation.
Figure 4.
Power dissipation vs. output power (RL = 4Ω, audio program simulation)
5
10
15
20
25
30
0123456
V
s = 14.4 V
R
L = 4 x 4 Ω
GAUSSIAN NOISE
CLIP START
P
tot (W)
P
o (W)
AC00036
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA8000N | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| TDA8001AN | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| TDA8001AT-T | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA8001T-T | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA8012M-T | FM, AUDIO DEMODULATOR, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7863D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW VOLTAGE TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR |
| TDA7868 | 功能描述:音頻放大器 Digital Input Quad Bridge Pwr 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7910 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEDIUM POWER SINGLE BIPOLAR OPERATIONAL AMPLIFIER |
| TDA8000 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart card interface |
| TDA8000T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart card interface |
發(fā)布緊急采購，3分鐘左右您將得到回復。