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參數(shù)資料
| 型號(hào)： | LA4278 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM10 |
| 封裝： | SIP-10 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大小： | 109K |
| 代理商： | LA4278 |
LA4278
Νο.7096-3/6
Pin Assignment and Block Diagram
LA4278
NF1
IN1
Filter
PRE GND
IN2
NF2
OUT2
OUT1
RL
VCC
Power GND
Top view
0.1
μ
F
1000
μ
F
C9
RL
C10
300
Ω
30k
Ω
30k
Ω
1.0
Ω
R3
0.1
μ
F
C7
1.0
Ω
R2
100
μ
F
C5
1000
μ
F
C6
4.7
μ
F
C4
100
μ
F
C3
100
μ
F
C1
C2
300
Ω
R1
750
Ω
2
3
4
5
6
7
8
9
10
1
+
4.7
μ
F
C8
1000
μ
F
* For Muting, add a resistor between pin 3 and GND. 750
Ω for the LA4266/67/68, 200Ω for the LA4276/77.
Description of External Parts
C1, C5 : Feedback capacitors
Decreasing the capacitance value lowers the low frequency response. Increasing the capacitance value
makes the starting time later.
C2, C4 : Input capacitors
Because the DC potential of the input pin is not zero, this capacitor can not be omitted. Decreasing the
capacitance value to an extremely low level lowers the low frequency response.
C3
: Ripple filter capacitor
Decreasing the capacitance value reduces ripple rejection. This capacitor also affects the starting time;
decreasing the capacitance value makes the starting time earlier.
C6, C9 : Output capacitors
Decreasing the capacitance value causes insufficient power at low frequencies.
C7, C10 : Oscillation blocking capacitors
Decreasing the capacitance value causes oscillation to occur easily. Use a mylar film capacitor that has good
high frequency response and temperature characteristics. The use of an electrolytic capacitor or a ceramic
capacitor may cause oscillation to occur at low temperatures.
C8
: Power capacitor
Decreasing the capacitance value causes ripple to occur easily. Locating this capacitor at a distance from the
IC or removing this capacitor may cause oscillation to occur.
R1
: Muting resistor
Refer to supplementary discussion “External Muting.”
R2, R3 : Resistors connected in series with oscillation blocking capacitor
These prevent phase shift in conjunction with the oscillation blocking capacitor so that oscillation does not
easily occur. There is an optimal value for the resistor; increasing or decreasing the resistance causes
oscillation to occur easily.
External Muting
Pull down the electric potential of the ripple filter pin (pin 3).
Muting becomes possible by inserting the discharge resistor
R3 between pin 3 and GND. If the resistance value of
R3 is too low, a popping noise is generated; if the resistance
value is too high, the muting effect is reduced.
(A value of 750
Ω is recommended for R3.)
相關(guān)PDF資料 |
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| LA4280 | 11.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PSIP14 |
| LA4282 | 11.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM12 |
| LA4285 | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM10 |
| LA4287 | 6 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM10 |
| LA4302T | 4 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4278-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA4280 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:2-Channel 10W AF Power Amp for Home Stereo, TV Use |
| LA4280-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA4280-TV | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA4282 | 制造商:Panasonic Industrial Company 功能描述:IC |
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