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參數(shù)資料
| 型號： | LA4270 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PSIP10 |
| 封裝： | HEAT SINK, SIP-10 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 565K |
| 代理商： | LA4270 |
LA4270
No.1724-4/10
Sample Application Circuit 1 : Dual-channel use (specified Test Circuit)
CH1
CH2
+
2
1
4
8
7
3
9
10
6
5
INPUT 1
INPUT 2
VCC
+
4.7
μF
C1
100
μF
0.1
μF
C2
R1
2.2
Ω
R2
2.2
Ω
RL
8
Ω
RL
8
Ω
4.7
μF
C4
C5
100
μF
100
μF/25V
C3
0.1
μF
C8
1000
μF/25V
C6
1000
μF/25V
470
μF/35V
C9
C10
C7
* : Polyester film capacitor
*
Description of External Parts
C1, C4
: Input capacitors
(4.7
μF)
Since the DC potential of the input pins is not 0, the two capacitors cannot be omitted. Decreasing
the capacitor value extremely causes the frequency response to lower at low frequencies.
C2, C3
: Feedback capacitors
(100
μF)
Decreasing the capacitor value causes the frequency response to lower at low frequencies.
Increasing the capacitor value makes the starting time later.
C5
: Ripple filter capacitor
(100
μF/25V)
Decreasing the capacitor value provides less ripple rejection. Decreasing the capacitor value also
makes the starting time earlier.
C6, C9
: Output capacitors
(1000
μF/25V)
Decreasing the capacitor value provides less power at low frequencies.
C7, C8
: Oscillation blocking capacitors
(0.1
μF polyester
Decreasing the capacitor value causes oscillation to be liable to occur. It is recommended to use
film capacitors)
polyester film capacitors which are excellent in high frequency response, temperature
characteristic. The use of electrolytic capacitors or ceramic capacitors may cause oscillation to
occur at low temperatures.
C10
: Power capacitor
(470
μF/35V)
Decreasing the capacitor value causes ripple to be liable to occur. If the distance between the IC
and this capacitor is made long or this capacitor is removed, oscillation may occur.
R1, R2
: Resistors connected in series with oscillation blocking capacitors
(2.2
Ω)
Used to prevent phase shift attributable to the oscillation blocking capacitors so that oscillation is
hard to occur. Increasing or decreasing the resistor value causes oscillation to be liable to occur.
The optimum value must be used.
External Muting
1. Lowering of potential at ripple filter pin (pin 3).
Muting can be provided by discharging resistor R
connected across pin 3 and GND to lower the potential
at pin 3. Too small an R value causes pop noise to occur ;
and too large an R value causes muting to fail to work.
If no adequate R value is obtained, it is recommended
that the R value is made rather small and the C5 value
is increased.
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| LA4275 | 6 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM7 |
| LA4276 | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM10 |
| LA4277 | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM10 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4275 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:6.0 W AF Power Amplifier for Home Stereo, TV Use |
| LA4276 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:3 W 2-Channel Power Amplifier |
| LA4277 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:5 W 2-Channel Power Amplifier |
| LA4277-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA4278 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:10 W 2-Channel Power Amplifier |
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