TA8272HQ TOSHIBA Semiconductor CORPORATION, TA8272HQ Datasheet - Page 6

• Manufacturer Part Number: TA8272HQ
• Description: Max Power 43 W Btl ? 4 Ch Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

V
Voltage of point (A)
Voltage of point (B)
ref
(−) Amp output
5.3
Elec. Vol.
*: It is possible to detect the abnormal output offset which is appeared by the large leakage of the input capacitor at
V
ref/2
In Case of Appearing Output Offset Voltage by Generating a Large Leakage Current on
the Input Capacitor etc.
threshold level of output offset voltage detector.
> V
GND
GND
GND
NPN transistor (Q2) is turned on while the inverted output voltage level become less than the
bias
(about 1.4 V)
Leak or short
Figure 9 Application and Detection Mechanism
V
ref/2
V
bias
Figure 10 Wave Form
6
25
V
A
5 V
L.P.F.
t
DC voltage of (+) Amp (at leak)
V
DC voltage of (−) Amp (at leak)
Offset voltage (at leak)
CC/2
B
(normal DC voltage)
V
Threshold level
t
t
t
CC/2
To CPU
2006-04-28