TB2932HQ Ver la hoja de datos (PDF) - Toshiba
Número de pieza
componentes Descripción
Fabricante
TB2932HQ Datasheet PDF : 37 Pages
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TB2932HQ
When the current detector for Tweeter open check is used, it is neccesary to take care as below:
- Need to input the pulse or signal which is the higher out of audience frequency for example f =
20 kHz
- The pulse or signal input timing has to be after mute off (play mode)
- At least, the read timing has to be after 1 cycle of input pulse or signal and more, the
recommadation cycles are 3 cycle and more if can.
- The level of input pulse or signal is more than the detection threshold level 300 mA or 500 mA.
For instance, if the tweeter impedance is 20 Ω at f = 20 kHz which is same as input signal frequency,
the output minimum voltage is: Vout = 500 mA × 20 Ω = 10 V and more.
Play
Mute
Mute ON
Output
WRITE DATA
stand by off
mute on
WRITE DATA
mute off
READ DATA
invalidity
READ DATA
invalidity
READ DATA
invalidity
Current detector is not effective
READ DATA
validity
Effective →
READ DATA
validity
Figure 8 Tweeter Open Detection Timing Chart
Finally, if DB1 D7 = 1 then the temperature of IC chip is close to the thermal shutdown point.
This warning bit becomes high, about 10 degrees below the temperature at which the
overtemperature protection operates.
Note 7: Timing charts may have been simplified for ease of reading.
Note 8: Please arrange to read all self-diagnosis functions twice or more and apply judgment in order to
avoid false triggering.
<Since the first diagnostic result has low confidence, please diagnose 2 times or more.>
14
2009-02-02
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