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參數(shù)資料
| 型號： | TA8221AHQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| 封裝： | 2 MM PITCH, PLASTIC, HZIP-17 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 1259K |
| 代理商： | TA8221AHQ |
TA8221AHQ / ALQ
2006-04-28
6
(Precaution 2)
If the falling time constant of the VCC line is large (the fall is gentle), the pop noise may become worse.
In this case, it is possible to prevent the pop noise from beoming worse by reducing the capacity of "ripple rapid
discharging circuit at the time of VCC off" accordign to the following steps :
(a) Short pin(1) (mute terminal) and pin(8) (ripple terminal).
(b) Increase the capacity of ripple capacitor of pin(8).
However, it shall be kept in mind that the time for turning the power on becomes longer as the result of step
(b).
7. External parts list and description
Influence
Sym
bol
Recom
mended
Value
Feature
Smaller Than
Recommended Value
Larger Than
Recommended Value
Remarks
C1
4.7F
DC blocking
Related to pop noise at VCC→on.
Related to gain.
Refer to item 4.
Related to pop noise at VCC→on.
C2
47F
Feedback
condenser
Determination of low cut
off frequency.
C2 =
f
R
L
f
2
1
·
π
C3
220F
Ripple
reduction
Time constant is small
at VCC→on or off.
Time constant is large
at VCC→on or off.
C4
0.12F
Oscillation
prevention
Made liable to
oscillate.
Oscillation allowance
Refer to item 3.
C5
1000F
Ripple filter
For filtering power supply hum and ripple.
Large at using AC rectified power supply.
Small at using DC power supply.
C6
1000PF
Oscillation
prevention
Oscillation allowance improved.
Noise reduction
Refer to item 3.
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| TA8221ALQ | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
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| TA8223K | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:LOW FREQUENCY POWER AMPLIFIER |
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| TA8224H | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:MULTI OUTPUT VOLTAGE REGULATOR FOR CD PLAYER |
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