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參數(shù)資料
| 型號(hào)： | TB2902HQ |
| 元件分類(lèi)： | 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)： | 7/38頁(yè) |
| 文件大小： | 444K |
| 代理商： | TB2902HQ |
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TB2902HQ
2004-08-18
15
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
at f = 20 kHz which is same as input signal frequency,
the output minimum voltage is: Vout
= 500 mA × 20 = 10 V and more.
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.>
Figure 10
Tweeter Open Detection Timing Chart
WRITE DATA
mute off
READ DATA
invalidity
READ DATA
validity
READ DATA
invalidity
READ DATA
validity
WRITE DATA
stand by off
mute on
READ DATA
invalidity
Current detector is not effective
Effective
→
Play
Mute
Mute ON
Output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TB2903HQ | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2903HQ | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2904HQ | 26 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2904HQ | 26 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2905HQ | 55 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB2903HQ | 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:Maximum Power 47W BTL x 4-ch Audio Power IC |
| TB2904HQ | 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:Maximum Power 43 W BTL ?4-ch Audio Power IC |
| TB2905HQ | 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:Class KB High-Efficiency, Low-Frequency Power Amplifier IC Maximum Power: 47 W x 4 Channels |
| TB2905HQ(O) | 功能描述:音頻放大器 25W x 4ch Class-KB Car Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TB2906HQ | 制造商:TOSHIBA 制造商全稱(chēng):Toshiba Semiconductor 功能描述:Maximum Power 43 W BTL x 4-ch Audio Power IC |
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