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參數(shù)資料
| 型號： | LA4557 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.4 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP12 |
| 封裝： | DIP-12 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 334K |
| 代理商： | LA4557 |
LA4557
No.2087–5/9
(1) DC power supply
Pd max=
+ Icco VCC (for stereo use) ...... (1)
(2) AC power supply
VCC2
: Supply voltage at quiescent mode
VCC (Pd) : Supply voltage at Pd max
VCC1
: Supply voltage at maximum output
r
: Voltage regulation VCC2 – VCC1
VCC1
Icco
: Quiescent current
Line regulation
Pd max=
+ Icco VCC (Pd) (for stereo use) ............... (2)
where
VCC (Pd)=
Example of Heat Sink Mounting Method
The heat sink must be of such a shape as to be able to dissipate heat from the IC plastic area and fin area and is soldered
to the printed circuit board as shown below. For the size of the heat sink, refer to the Pd – Ta characteristic. The material
of the heat sink is recommended to be copper or iron which is solderable. It is recommended to apply silicone grease to
the IC plastic area to reduce thermal resistance between the heat sink and the IC plastic area.
VCC2
π2R
L
VCC(Pd)2
π2R
L
Proper Cares in Using IC
1. If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum
ratings to be exceeded, thereby leading to breakdown. Allow an ample margin of variation for supply voltage, etc. and
use the IC in the range where the maximum ratings are not exceeded.
2. Pin-to-pin short : If power is applied when the space between pins is shorted, breakdown or deterioration may occur.
When mounting the IC on the board and applying power, make sure that the space between pins is
not shorted with solder, etc.
3. Load short : If the IC is used with the load shorted for a long time, breakdown or deterioration may occur. Be sure not
to short the load.
4. When the IC is used in radios or radio cassette tape recorders, keep a good distance between IC and bar antenna.
5. When making the board, refer to the sample printed circuit pattern.
6. It should be noted that some plug jacks to be used for connecting to the external speaker are such that both poles are
shorted once when connecting.
(1+r) VCC1
r VCC1
√2 π R
L
RL
Po max
√
1+
×
相關PDF資料 |
PDF描述 |
|---|---|
| LA4558 | 2.4 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP12 |
| LA4571MB | 0.032 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LA4571MB | 0.032 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LA4575 | 0.038 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP16 |
| LA4575M | 0.038 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA4558 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA4560M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LA4570 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LA4570M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LA4571 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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