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参数资料
| 型号： | TS4871IST |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 13/28页 |
| 文件大小： | 1491K |
| 代理商： | TS4871IST |
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TS4871
20/28
Fig. 83 : SO8 & MiniSO8 Demoboard Top
Solder Layer
Fig. 84 : SO8 & MiniSO8 Demoboard Bottom Solder
Layer
s BTL Configuration Principle
The TS4871 is a monolithic power amplifier with a
BTL output type. BTL (Bridge Tied Load) means
that each end of the load is 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
single
ended
configuration.
s Gain In Typical Application Schematic
(see 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:
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.
s 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.
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.
)
W
(
R
)
Vout
2
(
Pout
L
2
RMS
=
Vout1 =
Vin
–
R fe ed
Ri n
-------------------- (V)
Vout2
Vo ut1 = 2Vin
–
Rfee d
Rin
-------------------- (V)
Gv =
Vout2
Vou t1
–
Vi n
--------------------------------------- = 2
Rfee d
Ri n
--------------------
F CL =
1
2
π Rin Cin
--------------------------------
Hz
()
FCH =
1
2
π Rfeed Cfeed
-----------------------------------------------
Hz
()
相关PDF资料 |
PDF描述 |
|---|---|
| TS4871IQT | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| TS4871IS | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS488IQT | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS488IST | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS489IQT | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4872 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE |
| TS487-2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE |
| TS4872_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE |
| TS4872IJT | 制造商:STMicroelectronics 功能描述: |
| TS487-2IQT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Amplifier. Other |
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