參數(shù)資料
型號: AN5270
廠商: PANASONIC CORP
元件分類: 音頻/視頻放大
英文描述: 4.3 W X 1(8ohm) Power Amplifier with Volume Control and Tone Control
中文描述: 4.3 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM9
文件頁數(shù): 9/9頁
文件大?。?/td> 82K
代理商: AN5270
9
ICs for Audio Common Use
AN5270
I
Technical Information (continued)
Power-off pop-noise countermeaasure (for study consideration only)
To prevent power-off shock noise, please ensure that V
CC2
(18 V) declines faster than V
CC1
(12 V). In addition, to
ensure that V
CC1
variation will not cause any 'pop' , one suggested countermeasure is to connect a condenser between
Pin6 and Pin9 (e.g. 47
μ
F, use non-polarity type if possible).
This effect of Cpop is to discharge C6 gradually as soon as power is switched off.
However, it must be noted that the necessity of this countermeasure is dependent upon the set design and other timing
considerations.
THD improvement (for study consideration only)
Instead of connecting the negative terminal of C6 to ground, when that terminal is connected to Pin1, it is noticed that
THD is improved considerably.
6
RF
Cpop
47
μ
F
NP
2200
μ
F
9
V
CC2
Fig. One suggested counter-measure against power-off 'pop' for AN5270.
C6
47
μ
F
1
6
47
μ
F
C6
Fig. THD improvement circuit.
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