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參數(shù)資料
| 型號(hào)： | TS4962IQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.8 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, DFN-8 |
| 文件頁數(shù)： | 24/44頁 |
| 文件大小： | 586K |
| 代理商： | TS4962IQT |
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Application information
TS4962
30/44
Doc ID 10968 Rev 8
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 fully differential amplifier are:
●
high PSRR (power supply rejection ratio).
●
high common mode noise rejection.
●
virtually zero pop without additional circuitry, giving a faster start-up time compared to
conventional single-ended input amplifiers.
●
easier interfacing with differential output audio DAC.
●
no input coupling capacitors required because of common-mode feedback loop.
The main disadvantage is that, since the differential function is directly linked to the external
resistor mismatching, particular attention should be paid to this mismatching in order to
obtain the best performance from the amplifier.
4.2
Gain in typical application schematic
Typical differential applications are shown in Figure 1 on page 6.
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 kΩ.
Due to the tolerance of the internal 150 k
Ω feedback resistor, the differential gain is in the
range (no tolerance on Rin):
A
V
diff
Out
+
Out
-
–
In
+
In
-
–
-------------------------------
300
R
in
----------
==
273
R
in
----------
A
V
diff
327
R
in
----------
≤≤
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS4962MEIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4972IJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| TS4972EIJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| TS4973IJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| TS4973EIJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4962M | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3W filter-free class D audio power amplifier |
| TS4962M_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3W filter-free class D audio power amplifier |
| TS4962MEIJT | 功能描述:音頻放大器 3W Filter-Free Class D Power Amplifier 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 |
| TS4962MEIKJT | 功能描述:3 W FILTER-FREE CLASS D AUDIO PO 制造商:stmicroelectronics 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:D 類 輸出類型:1-通道（單聲道） 不同負(fù)載時(shí)的最大輸出功率 x 通道數(shù):2.8W x 1 @ 4 歐姆 電壓 - 電源:2.4 V ~ 5.5 V 特性:消除爆音，差分輸入，待機(jī)，熱保護(hù) 工作溫度:-40°C ~ 85°C（TA） 供應(yīng)商器件封裝:9-覆晶 封裝/外殼:9-UFBGA 標(biāo)準(zhǔn)包裝:1 |
| TS4972 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
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