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TA8263BH Datasheet(PDF) 6 Page - Toshiba Semiconductor

Part No. TA8263BH
Description  Max Power 43 W BTL x 4 ch Audio Power IC
Download  13 Pages
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TA8263BH Datasheet(HTML) 6 Page - Toshiba Semiconductor

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TA8263BH
2002-02-13
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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