- 您現在的位置：買賣IC網 > PDF目錄98290 > TS4994IQT (STMICROELECTRONICS) 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 PDF資料下載
參數資料
| 型號： | TS4994IQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| 封裝： | 3 X 3 MM, 0.50 MM PITCH, LEAD FREE, DFN-8 |
| 文件頁數： | 21/35頁 |
| 文件大小： | 483K |
| 代理商： | TS4994IQT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
Application information
TS4994
28/35
To calculate the maximum ambient temperature Tamb allowable, you need to know:
●
The value of the power supply voltage, VCC
●
The value of the load resistor, RL
●
The Rthja value for the package type
Example: VCC =5V, RL =8Ω, Rthja = 80°C/W
Using the power dissipation formula given above in Equation 3 this gives a result of:
Pdissmax = 633mW
Tamb is calculated as follows:
Equation 5
Therefore, the maximum allowable value for Tamb is:
Tamb = 125-80x0.633=74°C
4.8
Decoupling of the circuit
Two capacitors are needed to correctly bypass the TS4994. A power supply bypass
capacitor Cs and a bias voltage bypass capacitor Cb.
Cs has particular influence on the THD+N in the high frequency region (above 7kHz) and an
indirect influence on power supply disturbances. With a value for Cs of 1F, you can expect
similar THD+N performance to that shown in the datasheet.
In the high frequency region, if Cs is lower than 1F, it increases THD+N, and disturbances
on the power supply rail are less filtered.
On the other hand, if Cs is higher than 1F, the disturbances on the power supply rail are
more filtered.
Cb has an influence on THD+N at lower frequencies, but its function is critical to the final
result of PSRR (with input grounded and in the lower frequency region).
4.9
Wake-up time: tWU
When the standby is released to put the device ON, the bypass capacitor Cb is not charged
immediately. As Cb is directly linked to the bias of the amplifier, the bias will not work
properly until the Cb voltage is correct. The time to reach this voltage is called the wake-up
TS4994 gain is close to zero. After the wake-up time, the gain is released and set to its
nominal value.
wake-up time.
T
amb
125
° CR
TJHA
P
dissmax
×
–
=
相關PDF資料 |
PDF描述 |
|---|---|
| TS4994IST | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4995EIJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4998IQT | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| TS555CPT | PULSE; RECTANGULAR, 2 MHz, TIMER, PDSO8 |
| TS555IN | PULSE; RECTANGULAR, 2 MHz, TIMER, PDIP8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4994IST | 功能描述:音頻放大器 1W Audio Power Amp 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 |
| TS4995 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2 W fully differential audio power amplifier with selectable standby and 6 dB fixed gain |
| TS4995EIJT | 功能描述:音頻放大器 1.2W input/output Diff Audio Pwr Amp 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 |
| TS4997 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W differential input stereo audio amplifier with programmable 3D effects |
| TS4997IQT | 功能描述:音頻放大器 Stereo w/3D effects 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 |
發布緊急采購，3分鐘左右您將得到回復。