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參數(shù)資料
| 型號(hào)： | LA4905 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM23 |
| 封裝： | SIP-23 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大小： | 756K |
| 代理商： | LA4905 |
LA4905 High-Efficiency Technology
(1) Signal-following switching scheme
The LA4905 adopts a switching regulator scheme in
the power supply applied to the amplifier output stage.
The LA4905 power dissipation is reduced significantly
by having the output voltage of the switching regulator
follow the input signal. Furthermore, in combination
with the nonlinear amplifier scheme described below,
the LA4905 design reduces the number of switching
regulators to merely one circuit even though it is a
BTL 2-channel amplifier. (See Figure 1.)
(2) Nonlinear amplifier
The LA4905 adopts a nonlinear amplifier that has the
nonlinear characteristics shown in Figure 2 in the
amplifier signal system. This scheme does not use the
center point voltage of 1/2 VCC used in normal
amplifiers, but instead uses a voltage about 2 V lower.
This allows the design to dispense with the lower side
switching regulator.
This nonlinear amplifier has a structure based on a
differential amplifier that has symmetric negative
feedback circuits. Although the BTL output stage
positive and negative phase output waveform is a half-
wave waveform that is expanded and compressed as
shown in Figure 3, the combined output waveform at
the negative load terminal is identical to that output by
earlier products.
No. 5504-3/10
LA4905
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA4906 | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM23 |
| LA49101H | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| LA4915 | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP28 |
| LA4917H | 7 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| LA4919N | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDFM28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4906 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for Car Audio Systems |
| LA4917H | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Audio Output for TV application High-Effciency Two-Channel 7W BTL Power Amplifier ICs |
| LA4919N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier |
| LA4B-M1C2LV-G | 制造商:IDEC CORPORATION 功能描述:Switch Push Button N.O./N.C. DPDT Flush Rectangular Button 0.1A 250VAC 250VDC Momentary Contact PC Pins Panel Mount/Through Hole |
| LA4B-M1C2LV-W | 制造商:IDEC CORPORATION 功能描述:Switch Push Button N.O./N.C. DPDT Flush Rectangular Button 0.1A 250VAC 250VDC Momentary Contact PC Pins Panel Mount/Through Hole |
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