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參數(shù)資料
| 型號： | LA4145 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 音頻放大器 |
| 英文描述： | 0.6 to 0.9 W AF Power Amplifier for Radio Cassette Recorders |
| 中文描述： | 0.6至0.9糯自動對焦功率放大器收錄音機 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大?。?/td> | 120K |
| 代理商： | LA4145 |
Proper care in changing voltage gain
An external resistor can be connected in series with the feedback capacitor at pin 2 to reduce the voltage gain.
(See RNF-VG characteristic.)
IC usage notes
1.
Maximum ratings
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 or applying power, make sure that the space between pins is not shorted with solder, etc.
3.
Radio applications
For use in radio applications, keep a good distance between IC and bar antenna.
4.
Printed circuit pattern
When designing the printed circuit pattern, make the power supply, output, and ground lines thicker and shorter and
determine the pattern and parts placement so that no feedback loop is formed between input and output. Place power
capacitor C
6
, oscillation blocking capacitor C
3
as close to the IC pin as possible to prevent oscillation from occurring.
(See the sample printed circuit pattern.)
Description of external parts
C
1
(47 μF)
Feedback capacitor (NF capacitor)
Low cutoff frequency f
L
depends on this capacitor.
f
L
= 90 Hz for C
1
= 47 μF.
Decreasing the capacitor value makes the starting time earlier.
C
2
(100 μF)
Bootstrap capacitor
C
3
(0.15 μF)
Oscillation blocking capacitor
It is recommended to use a polyester film capacitor being good in
temperature characteristic, high frequency characteristic.
C
4
(470 μF)
Output capacitor
C
5
(47 μF)
Decoupling capacitor
Serves to reject ripple. The starting time depends on this capacitor.
Increasing the capacitor value makes the starting time later.
C
6
(470 μF)
Power capacitor
Place as close to the power pin of the IC as possible.
R
1
(30 k
)
Input bias resistor
Serves to apply input bias. The input impedance almost entirely
depends on this resistor value. If a variable resistor also serves for this
purpose, this resistor can be omitted. In this case, it is recommended
to use a resistor of 30 k
.
A
Pd max Ta
50
×
50 mm
2
PCB
Ambient temperature, Ta – °C
LA4145
No.1339-2/5
相關PDF資料 |
PDF描述 |
|---|---|
| LA4147 | 0.6 To 0.9 AF Power Amplifier |
| LA4160 | SINGLE-CHIP AF AMPLIFIER |
| LA4165M | Recording/Playback IC for Micro-Cassette Tape Recorder |
| LA4166M | Recording and Playback System for Microcassette Players |
| LA4167M | 1-Channel Record/Playback System for Microcassette and Cassette Recorders |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA4146 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:2-CHANNEL AF POWER AMP, FOR RADIO, TAPE RECORDER |
| LA4147 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:2-CHANNEL AF POWER AMP, FOR RADIO, TAPE RECORDER |
| LA4160 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA4162 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:SINGLE-CHIP AF AMPLIFIER |
| LA4165M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Recording/Playback IC for Micro-Cassette Tape Recorder |
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