TB2932HQ 데이터 시트보기 (PDF) - Toshiba
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TB2932HQ Datasheet PDF : 37 Pages
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TB2932HQ
Description for permanent diagnosis
This IC can provide permanent diagnosis under the following conditions, whether they occur before
or after turning ON:
-Short to GND
-Short to VCC
-Output to output short circuit
-Output offset detection
-Current detection for tweeter open
This permanent diagnosis is available not only with the diagnostic cycle byte: IB1 D6 set at 1 but
also when set at 0.
Additionally, the signal can be obtained by entering just a read command. It is not necessary to
write the data.
With permanent diagnosis fault detection, the first read data after fault removal will still show a
Fault. Therefore, it is necessary to obtain 3 or more readings in order to prevent a miss judgment.
For example, the speaker sometimes makes a large counter electro motive force which this IC could
recognize as a fault event.
Additionally, this permanent diagnosis is automatically on after the turning on diagnosis operation
finished therefore there is no need to send the extra command.
WRITE DATA
READ DATA
READ DATA
result faulty
READ DATA
result faulty
READ DATA
result not faulty
Pin10
ripple
voltage
Permanent diagnostic DATA
permitted time
Turn On diagnostic
DATA permitted time
Turn On diagnostic
acquisition time (80 ms typ.)
FAULT
event
FAULT
removed
Figure 5 Permanent Diagnosis Timing Chart for Each Short Detection
11
2009-02-02
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