TA8263BH 데이터 시트보기 (PDF) - Toshiba

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TA8263BH

Max Power 43 W BTL × 4 ch Audio Power IC

Toshiba 

TA8263BH

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.

Vref

Elec. Vol.

Leak or short

Vref/2 Vbias

V

5V

DC voltage of (+) Amp (at leak)

VCC/2 (normal DC voltage)

DC voltage of (-) Amp (at leak)

t

Offset voltage (at leak)

25

A

L.P.F.

B

To CPU

*: 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)

Figure 9 Application and Detection Mechanism

(-) Amp output

GND

Voltage of point (A)

GND

Voltage of point (B)

GND

Figure 10 Wave Form

VCC/2

Threshold level

t

t

t

6

2002-02-13

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