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參數(shù)資料
| 型號(hào)： | LA4440 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 6W 2-Channel, Bridge 19W typ Power Amplifier |
| 中文描述： | 6W 2通道，大橋19W典型功率放大器 |
| 文件頁(yè)數(shù)： | 5/13頁(yè) |
| 文件大小： | 467K |
| 代理商： | LA4440 |
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LA4440
No.750–5/13
Voltage Gain Adjust at Stereo Mode
R
NF
=50
(typ), R
f
=20k
(typ)
At R
NF
’=0 (recommended VG)
VG=20log (dB)
In case of using R
NF
’
VG=20log R
NF
+R
NF
’
VG
R
NF
Rf
Voltage Gain Adjust at Bridge Amplifier Mode (No. 1)
· The bridge amplifier configuration is as shown left, in
which ch1 and ch2 operate as noninverting amplifier
and inverting amplifier respectively.
The output of the noninverting amplifier divided by
resistors R3, R4 is applied, as input, to the inverting
amplifier.
Since attenuation (R4/R3) of the non-inverting amplifier
output and amplification factor (R
f
/R4+R
NF
) of the
inverting amplifier are fixed to be the same, signals of
the same level and 180
°
out of phase with each other
can be obtained at output pins (12) and (10). The total
voltage gain is apparently higher than that of the
noninverting amplifier by 6dB and is approximately
calculated by the following formula.
VG=20log R
In case of reducing the voltage gain, R
NF
’ is connected
to the noninverting amplifier side only and the following
formula is used.
VG=20log R
NF
+R
NF
’
VG=20log R
NF
+R
NF
’
where (R
NF
+R
NF
’) << R5
From this formula, it is seen that connecting R
NF
’
causes the voltage gain to be reduced at the modes of
both stereo amplifier and bridge amplifier.
R
NF
Voltage Gain Adjust at Bridge Amplifier Mode (No. 2)
R
f
R
f
2
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|---|---|
| LA4440-E | 功能描述:音頻放大器 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 |
| LA4440J-K-E | 功能描述:音頻放大器 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 |
| LA4445 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:5.5W 2-Channel AF Power Amplifier |
| LA4445-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA4446 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:5.5W 2-Channel AF Power Amp |
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