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參數(shù)資料
| 型號： | TA8221ALQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
| 封裝： | PLASTIC, HSIP-17 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 1259K |
| 代理商： | TA8221ALQ |
TA8221AHQ / ALQ
2006-04-28
5
5. Muting function
Through setting pin(1) (mute terminal) at about 1V or less, muting
becomes possible.
The interval circuit of IC is shown in Fig.5.
When pin(1) is set to low, Q1 and Q2 are turned to on, the charge
of the ripple condenser is discharged and the bias is cut. The mute
amount of 60dB or over can be obtained.
Since this muting function rapidly discharge the charge of the ripple
filter capacitor of pin(8), the pop noise is generated by the DC
fluctuation of the bias section.
Therefore, this muting function is not appropriate to the audio muting but it
is effective in muting at VCC→on.
6. Rapid ripple discharging circuit at the time of VCC off
This circuit is effective in such a mode where the VCC and the standby terminals become high / low
simultaneously ; for instance, for a pop noise produced when the power is turned on / off repeatedly by operating
the ignition key.
If VCC is off, VCC≒7V is detected internally on IC and
(1) The power stage bias circuit is cut, and
(2) Pin(8) : Ripple capacitor is rapidly discharged by turning Q3 on and then Q1 and Q2 on.
(Precaution 1)
When the standby terminal was put to the low level after the ripple rapid
discharging circuit was operated (VCC≒7V) at the time when VCC was turned
off, a pop noise may be generated. Therefore, VCC which makes the standby
terminal low shall be set at 8V or above so that (1) the standby terminal is
put at the low level and (2) the ripple rapid discharging circuit is turned on
when VCC is turned off (in order of (1) and (2)).
An example of application is shown in (Fig.7).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TA8221AHQ | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| TA8221ALQ | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
| TA8221AL | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
| TA8221AH | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| TA8221AL | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
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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 |
| TA8225 | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:45W BTL AUDIO AMPLIFIER |
| TA8225H | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:45W BTL AUDIO AMPLIFIER |
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