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參數(shù)資料
| 型號： | TS2012EIJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA16 |
| 封裝： | 2.10 X 2.10 MM, 0.50 MM PITCH, ROHS COMPLIANT, FLIP CHIP PACKAGE, 16 PIN |
| 文件頁數(shù)： | 16/33頁 |
| 文件大?。?/td> | 656K |
| 代理商： | TS2012EIJT |
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TS2012FC
Application information
23/33
4.5
Decoupling of the circuit
Power supply capacitors, referred to as CS1 and CS2, are needed to correctly bypass the
TS2012.
The TS2012 has a typical switching frequency of 280 kHz and an output fall and rise time of
approximately 5 ns. Due to these very fast transients, careful decoupling is mandatory.
A 1 F ceramic capacitor (CS1) between PVCC and PGND and one additional ceramic
capacitor 0.1 F (CS2) are enough. A 1 F capacitor must be located as close as possible to
the device PVCC pin in order to avoid any extra parasitic inductance or resistance created
by a long track wire. Parasitic loop inductance, in relation with di/dt, introduces overvoltage
that decreases the global efficiency of the device and may cause, if this parasitic inductance
is too high, a breakdown of the TS2012. For filtering low-frequency noise signals on the
power line, you can use a CS1 capacitor of 4.7 F or more.
In addition, even if a ceramic capacitor has an adequate high frequency ESR (equivalent
series resistance) value, its current capability is also important. A size of 0603 is a good
compromise, particularly when a 4
Ω load is used.
Another important parameter is the rated voltage of the capacitor. A 1 F/6.3 V capacitor
used at 5 V, loses about 50% of its value. With a power supply voltage of 5 V, the decoupling
value, instead of 1 F, could be reduced to 0.5 F. As CS has particular influence on the
THD+N in the medium-to-high frequency region, this capacitor variation becomes decisive.
In addition, less decoupling means higher overshoots, which can be problematic if they
reach the power supply AMR value (6 V).
4.6
Wake-up time (tWU) and shutdown time (tSTBY)
During the wake-up sequence when the standby is released to set the device ON, there is a
delay. The wake-up sequence of the TS2012 consists of two phases. During the first phase
tWU-A, a digitally-generated delay, mutes the outputs. Then, the gain increasing phase tWU-A
begins. The gain increases smoothly from the mute state to the preset gain selected by the
digital pins G0 and G1. This startup sequence avoids any pop noise during startup of the
amplifier. Refer to Figure 37: Wake-up phase.
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| TS3431BIZ-AP | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, PBCY3 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS2012FC | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Filter-free flip-chip stereo 2x2.5 W class D audio power amplifer |
| TS2012IQT | 功能描述:音頻放大器 FILTER-FREE STEREO 2X2.8 CLASS D P 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 |
| TS2012IQT-CUT TAPE | 制造商:ST 功能描述:TS2012 Series 2.8 W Filter-Free Stereo Class D Audio Power Amplifier - QFN-20 |
| TS2012-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR TS2012 |
| TS2012-W3 | 制造商:Black Box Corporation 功能描述:3 YEAR WARRANTY FOR TS2012 |
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