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参数资料
| 型号： | TS4972IJT |
| 厂商： | 意法半导体 |
| 元件分类： | 音频放大器 |
| 英文描述： | Aluminum Electrolytic Capacitor; Capacitor Type:General Purpose; Voltage Rating:35VDC; Capacitor Dielectric Material:Aluminum Electrolytic; Operating Temperature Range:-55 C to +105 C; Capacitance:4.7uF RoHS Compliant: Yes |
| 中文描述： | 为1.2W音频功率放大器，具有活性高备用模式 |
| 文件页数： | 23/28页 |
| 文件大小： | 904K |
| 代理商： | TS4972IJT |
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TS4972
23/28
In lower frequency we want 20 Hz (-3dB cut off
frequency). Then:
1
2
π
RinF
CL
So, we could use for Cin a 1μF capacitor value
which gives 16Hz.
In Higher frequency we want 20kHz (-3dB cut off
frequency). The Gain Bandwidth Product of the
TS4972 is 2MHz typical and doesn't change when
the amplifier delivers power into the load.
The first amplifier has a gain of:
and the theoretical value of the -3dB cut-off higher
frequency is 2MHz/3 = 660kHz.
We can keep this value or limit the bandwidth by
adding a capacitor Cfeed, in parallel on Rfeed.
Then:
So, we could use for Cfeed a 220pF capacitor
value that gives 24kHz.
Now, we can calculate the value of Cb with the
formula
τ
b = 50k
xCb >>
τ
in = (Rin+Rfeed)xCin
which permits to reduce the pop and click effects.
Then Cb >> 0.8μF.
We can choose for Cb a normalized value of 2.2μF
that gives good results in THD+N and PSRR.
In the following tables, you could find three
another examples with values required for the
demoboard.
Application n°1 : 20Hz to 20kHz bandwidth and
6dB gain BTL power amplifier.
Components :
Application n°2 : 20Hz to 20kHz bandwidth and
20dB gain BTL power amplifier.
Components :
Designator
Part Type
R1
22k / 0.125W
R4
22k / 0.125W
R6
Short Cicuit
R7
100k / 0.125W
C
IN
=
----------------------------- = 795nF
Rin
Rfeed
C
FEED
=
2
π
R
FEED
F
CH
-----------------1
R8
Short Circuit
C5
470nF
C6
100μF
C7
100nF
C9
Short Circuit
C10
Short Circuit
C12
1μF
S1, S2, S6, S7
2mm insulated Plug
10.16mm pitch
S8
3 pts connector 2.54mm
pitch
P1
SMB Plug
Designator
Part Type
R1
110k / 0.125W
R4
22k / 0.125W
R6
Short Cicuit
R7
100k / 0.125W
R8
Short Cicuit
C5
470nF
C6
100μF
C7
100nF
C9
Short Circuit
C10
Short Circuit
C12
1μF
S1, S2, S6, S7
2mm insulated Plug
10.16mm pitch
S8
3 pts connector 2.54mm
pitch
P1
SMB Plug
Designator
Part Type
相关PDF资料 |
PDF描述 |
|---|---|
| TS4972 | 1.2W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4972JT | 1.2W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4973IJT | 1.2W TWO AUDIO INPUTS WITH GAIN CONTROL POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4973 | 1.2W TWO AUDIO INPUTS WITH GAIN CONTROL POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4974 | 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4972JT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4973 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2W TWO AUDIO INPUTS WITH GAIN CONTROL POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4973EIJT | 功能描述:音频放大器 1.2W 2 audio inputs 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 |
| TS4973IJT | 制造商:STMicroelectronics 功能描述: |
| TS4974 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins |
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