參數(shù)資料
型號(hào)： TB2934HQ
元件分類： 音頻／視頻放大
英文描述： 45 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25
封裝： 1 MM PITCH, PLASTIC, HZIP-25
文件頁(yè)數(shù)： 4/40頁(yè)
文件大小： 574K
代理商： TB2934HQ
TB2934HQ
2006-04-28
12
(3)
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.
Figure 7
Permanent Diagnosis Timing Chart for Each Short Detection
Turn On diagnostic
acquisition time (80 ms typ.)
Turn On diagnostic
DATA permitted time
READ DATA
WRITE DATA
READ DATA
result faulty
FAULT
event
Pin10
ripple
voltage
READ DATA
result not faulty
FAULT
removed
READ DATA
result faulty
Permanent diagnostic DATA
permitted time
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