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参数资料
| 型号： | TS4962MEIJT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封装： | ROHS COMPLIANT, FCP-9 |
| 文件页数： | 21/41页 |
| 文件大小： | 1104K |
| 代理商： | TS4962MEIJT |
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Application information
TS4962M
28/41
5
Application information
5.1
Differential configuration principle
The TS4962M is a monolithic fully-differential input/output class D power amplifier. The
TS4962M 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, maximizes 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 a faster start-up time compared to
conventional single-ended input amplifiers.
●
Easier interfacing with differential output audio DAC.
●
No input coupling capacitors required due 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.
5.2
Gain in typical application schematic
Typical differential applications are shown in Figure 1 on page 4.
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 150k
Ω feedback resistor, the differential gain will be 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
----------
≤≤
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4962MEIKJT | 功能描述:3 W FILTER-FREE CLASS D AUDIO PO 制造商:stmicroelectronics 系列:- 包装:剪切带（CT） 零件状态:在售 类型:D 类 输出类型:1-通道（单声道） 不同负载时的最大输出功率 x 通道数:2.8W x 1 @ 4 欧姆 电压 - 电源:2.4 V ~ 5.5 V 特性:消除爆音，差分输入，待机，热保护 工作温度:-40°C ~ 85°C（TA） 供应商器件封装:9-覆晶 封装/外壳:9-UFBGA 标准包装:1 |
| TS4972 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4972_04 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2W Audio Power Amplifier with Standby Mode Active High |
| TS4972EIJT | 功能描述:音频放大器 1.2W audio power amp W/Standby 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 |
| TS4972EIJT1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2W Audio Power Amplifier with Standby Mode Active High |
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