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參數(shù)資料
| 型號(hào)： | LA4140 |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 0.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PSIP9 |
| 封裝： | SIP-9 |
| 文件頁(yè)數(shù)： | 3/5頁(yè) |
| 文件大小： | 185K |
| 代理商： | LA4140 |
LA4140
No.528–3/5
[Peripheral Parts]
C1, 220pF :
Anti-noise capacitor.
C2, 3.3
F :
Coupling capacitor. Large C2 makes operating noise of variable resistor large. Small one makes fre-
quency response of low frequency range narrow.
C3, 47
F :
Feedback capacitor. Small C3 makes the starting time short, but frequency response of low range
narrow.
C4, 100pF :
For frequency response adjusting of high range, but excessive small one is apt to oscillate.
C5, 0.068
F : For anti-oscillation. Polyester film capacitor is available which has good thermal and high frequency
characteristics.
C6, 470
F : Output capacitor. It deciders power of low frequency.
C7, 47
F :
Bootstrap capacitor. Excssive small C7 causes wave from clipping point to be unbalanced at low
frequency range.
C8, 470
F : Filter capacitor.
C9, 0.01
F : Anti-oscillation. Polyester film capacitor is available.
C10, 100
F : Filter capacitor. Rejects power line hum. Small C10 decreases ripple rejection ratio.
Rf, 47 :
Decides voltage gain. Closed loop voltage gain is nearly calculated as follows. But about
±3dB toler-
ance should be prepared owing to scatter of internal resistance of IC.
VG=20 log (15000/Rf []) [dB]
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