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參數(shù)資料
| 型號： | TA8272HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | AUDIO AMPLIFIER, PZFM26 |
| 封裝： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 306K |
| 代理商： | TA8272HQ |
2006-04-28
6
5.3
In Case of Appearing Output Offset Voltage by Generating a Large Leakage Current on
the Input Capacitor etc.
NPN transistor (Q2) is turned on while the inverted output voltage level become less than the
threshold level of output offset voltage detector.
t
(
) Amp output
Figure 10
Wave Form
Threshold level
VCC/2
GND
t
Voltage of point (A)
GND
t
Voltage of point (B)
GND
Figure 9
Application and Detection Mechanism
Vref
Leak or short
Elec. Vol.
Vref/2
25
5 V
L.P.F.
A
B
To CPU
Vbias
V
DC voltage of (
+) Amp (at leak)
DC voltage of (
) Amp (at leak)
VCC/2 (normal DC voltage)
Offset voltage (at leak)
*: It is possible to detect the abnormal output offset which is appeared by the large leakage of the input capacitor at
Vref/2 > Vbias (about 1.4 V)
t
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