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参数资料
| 型号： | TS4890 |
| 厂商： | 意法半导体 |
| 英文描述： | RAIL TO RAIL OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| 中文描述： | 轨至轨输出1W的音频功率放大器，具有备用模式有源低 |
| 文件页数： | 24/32页 |
| 文件大小： | 833K |
| 代理商： | TS4890 |
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TS4890
24/32
Fig. 105 : SO8 & MiniSO8 Demoboard Top
Solder Layer
Fig. 106 :
SO8 & MiniSO8 Demoboard Bottom
Solder Layer
I
BTL Configuration Principle
The TS4890 is a monolithic power amplifier with a
BTL output type. BTL (Bridge Tied Load) means
that each end of the load are connected to two
single ended output amplifiers. Thus, we have :
Single ended output 1 = Vout1 = Vout (V)
Single ended output 2 = Vout2 = -Vout (V)
And Vout1 - Vout2 = 2Vout (V)
The output power is :
For the same power supply voltage, the output
power in BTL configuration is four times higher
than
the output power in
configuration.
single ended
I
Gain In Typical Application Schematic
(cf. page 1)
In flat region (no effect of Cin), the output voltage
of the first stage is :
For the second stage : Vout2 = -Vout1 (V)
The differential output voltage is
The differential gain named gain (Gv) for more
convenient usage is :
Vout
2
Vout
Gv
=
Remark : Vout2 is in phase with Vin and Vout1 is
180 phased with Vin. It means that the positive
terminal of the loudspeaker should be connected
to Vout2 and the negative to Vout1.
I
Low and high frequency response
In low frequency region, the effect of Cin starts.
Cin with Rin forms a high pass filter with a -3dB cut
off frequency .
1
F
CL
π
In high frequency region, you can limit the
bandwidth by adding a capacitor (Cfeed) in
parallel on Rfeed. Its form a low pass filter with a
-3dB cut off frequency .
1
F
CH
π
)
W
(
R
)
Vout
2
Pout
L
2
RMS
=
)
V
(
Rin
Rfeed
Vin
1
Vout
=
)
V
(
Rin
Rfeed
Vin
2
1
Vout
2
Vout
=
Rin
Rfeed
2
Vin
1
=
(Hz)
RinCin
2
=
)
Hz
(
Cfeed
Rfeed
2
=
相关PDF资料 |
PDF描述 |
|---|---|
| TS4890IQT | RAIL TO RAIL OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4890ID | RAIL TO RAIL OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4890IDT | RAIL TO RAIL OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW |
| TS4900 | 300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900ID | 300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4890ID | 功能描述:音频放大器 1W Audio Power Amp 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 |
| TS4890IDT | 功能描述:音频放大器 1W Audio Power Amp 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 |
| TS4890IQT | 功能描述:音频放大器 1W Mono Audio Power Amplifier 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 |
| TS4890IS | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AUDIO AMPLIFIER|SINGLE|BIPOLAR|TSSOP|8PIN|PLASTIC |
| TS4890IST | 功能描述:音频放大器 1W Audio Power Amp 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 |
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