TA8261AH View Datasheet(PDF) - Toshiba

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TA8261AH

Max Power 40 W BTL × 4CH Audio Power IC

Toshiba 

TA8261AH

5. Diagnosis output (pin 25)

The diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 7.

In case diagnosis circuit that detect unusual case is operated, NPN Tr. (Q1) or (Q2) is turned on.

It is possible to protect all the system of apparatus as well as power IC protection.

In case of being unused this function, use this IC as open-connection on pin 25.

pin 25: Open collector output (active low)

Figure 7 Self diagnosis output

5.1 In case of over voltage power supplied.

NPN Tr. (Q1) is turned on.

Threshold of over voltage protection: VCC = 22 V (typ.)

Figure 8 Application 1

5.2 In case of shorting output to VCC/GND

NPN Tr. (Q2) is turned on.

Additionally, in case of shorting OUT to GND, NPN Tr. (Q1) is turned on with (Q2), because output

offset voltage detector is operated at this condition.

6

2001-08-16

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