TB2903HQ Просмотр технического описания (PDF) - Toshiba

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TB2903HQ

Maximum Power 47 W BTL ×4-ch Audio Power IC

Toshiba 

TB2903HQ

4. Off-set detection function

In case of Appearing output offset voltage by Generating a Large Leakage Current on the input

Capacitor etc.

Vref

Elec. vol

Leak or short

RS1

Vref/2

Vbias

V

DC Voltage (+) Amp (at leak) (RS1)

VCC/2 (normal DC voltage)

DC Voltage (−) Amp (at short) (RS2)

+

Offset voltage (at leak or short)

5V

−

25

A

L.P.F.

To CPU

B

Figure 6 Application and Detection Mechanism

(+) Amp output

GND

Voltage of

point (A)

GND

Voltage of

point (B)

GND

Threshold level (RS1)

VCC/2

Threshold level (RS2)

t

t

RS2

t

Figure 7 Wave Form

5

2006-04-28

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