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參數(shù)資料
| 型號(hào)： | TS4962EIJT |
| 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(yè)數(shù)： | 19/37頁(yè) |
| 文件大小： | 834K |
| 代理商： | TS4962EIJT |
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Application Information
TS4962
26/37
4
Application Information
4.1
Differential configuration principle
The TS4962 is a monolithic fully-differential input/output class D power amplifier. The TS4962
also includes a common-mode feedback loop that controls the output bias value to average it at
Vcc/2 for any DC common mode input voltage. This allows the device to always have a
maximum output voltage swing, and by consequence, maximize the output power. Moreover, as
the load is connected differentially compared to a single-ended topology, the output is four
times higher for the same power supply voltage.
The advantages of a full-differential amplifier are:
●
High PSRR (Power Supply Rejection Ratio).
●
High common mode noise rejection.
●
Virtually zero pop without additional circuitry, giving an faster start-up time compared to
conventional single-ended input amplifiers.
●
Easier interfacing with differential output audio DAC.
●
No input coupling capacitors required thanks to common mode feedback loop.
The main disadvantage is:
●
As the differential function is directly linked to external resistor mismatching, paying
particular attention to this mismatching is mandatory in order to obtain the best
performance from the amplifier.
4.2
Gain in typical application schematics
Typical differential applications are shown in
In the flat region of the frequency-response curve (no input coupling capacitor effect), the
differential gain is expressed by the relation:
with Rin expressed in k.
Due to the tolerance of the internal 150k
feedback resistor, the differential gain will be in the
range (no tolerance on Rin):
For the remainder of this chapter, Avdiff will be referred to as Av for simplicity’s sake.
Av
diff
Out
+
Out
-
–
In
+
In
-
–
-------------------------------
300
R
in
----------
=
in
diff
in
R
327
Av
R
273
≤
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS4962EIKJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 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 |
| TS4962MEIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(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 |
| 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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