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參數資料
| 型號： | TS4962EIKJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封裝： | LEAD FREE, FLIP CHIP, 9 PIN |
| 文件頁數： | 24/37頁 |
| 文件大小： | 834K |
| 代理商： | TS4962EIKJT |
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Application Information
TS4962
30/37
We have the following equations:
In general, for mixed situations (single-ended and differential inputs) we must use the same
rule: equalize impedance on both TS4962 inputs.
4.10
Output filter considerations
The TS4962 is designed to operate without an output filter. However, due to very sharp
transients on TS4962 output, EMI radiated emissions may cause some standard compliance
issues.
These EMI standard compliance issues can appear if the distance between the TS4962
outputs and loudspeaker terminal are long (typically more than 50mm, or 100mm in both
directions, to the speaker terminals). As each PCB layout and internal equipment device are
different for each configuration, it is difficult to provide a one-size-fits-all solution.
However, to decrease the probability of EMI issues, there are several simple rules to follow:
●
Reduce, as much as possible, the distance between the TS4962 output pins and the
speaker terminals.
●
Use a ground plane for “shielding” sensitive wire.
●
Place, as close as possible to the TS4962 and in series with each output, a ferrite bead
with a rated current of minimum 2.5A and impedance greater than 50
at frequencies
>30MHz. If, after testing, these ferrite beads are not necessary, replace them by a short-
circuit.
●
Allow a footprint to place, if necessary, a capacitor to short perturbations to ground (see
following schematic).
In the case where the distance between the TS4962's output and speaker terminals is high, it is
possible to have low-frequency EMI issues due to the fact that the typical operating frequency is
250kHz.
In this configuration a filter, similar to that shown in
Figure 2 on page 3, must be used in close
proximity to the TS4962.
Out
+
Out
-
–
V
e1
300
R
in 1
-----------
×… V
ek
300
R
ink
-----------
×
(V)
++
=
R
eq
1
R
in i
----------
i1
=
k
∑
-------------------
=
∑
=
k
1
i
Cini
Ceq
)
F
(
F
Rini
2
1
Cini
CLi
×
π
×
=
Ferrite chip bead
about 100pF
Gnd
From TS4962 output
To speaker
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| TS4962EKIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4962IJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4962IQT | 2.8 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4962EKIJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3W Filter-free Class D Audio Power Amplifier |
| TS4962IJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3W Filter-free Class D Audio Power Amplifier |
| TS4962IQ | 制造商:STMicroelectronics 功能描述: |
| TS4962IQT | 功能描述:音頻放大器 3W Class D w/standby 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 |
| TS4962M | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3W filter-free class D audio power amplifier |
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