- 您现在的位置：买卖IC网 > PDF目录98290 > TS4994EIKJT (STMICROELECTRONICS) 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 PDF资料下载
参数资料
| 型号： | TS4994EIKJT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封装： | ROHS COMPLIANT, FCP-9 |
| 文件页数： | 24/35页 |
| 文件大小： | 694K |
| 代理商： | TS4994EIKJT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
Application information
TS4994FC
30/35
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-flipchip = 100°C/W (100mm copper heatsink)
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=62°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
×
–
=
相关PDF资料 |
PDF描述 |
|---|---|
| TS4994IQT | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4994FC | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2 W differential input/output audio power amplifier with selectable standby |
| TS4994IJT | 功能描述:音频放大器 STANDARD LINEAR RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4994IQT | 功能描述:音频放大器 1W diff input/output audio Pwr amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4994IST | 功能描述:音频放大器 1W Audio Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4995 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2 W fully differential audio power amplifier with selectable standby and 6 dB fixed gain |
发布紧急采购，3分钟左右您将得到回复。