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| 型号： | TB2902HQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 45 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 7/40页 |
| 文件大小： | 579K |
| 代理商： | TB2902HQ |
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TB2902HQ
2006-04-28
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
相关PDF资料 |
PDF描述 |
|---|---|
| TB2902HQ | 45 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TB2903HQ | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Maximum Power 47W BTL x 4-ch Audio Power IC |
| TB2904HQ | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Maximum Power 43 W BTL ?4-ch Audio Power IC |
| TB2905HQ | 制造商:TOSHIBA 制造商全称: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:音频放大器 25W x 4ch Class-KB Car Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TB2906HQ | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Maximum Power 43 W BTL x 4-ch Audio Power IC |
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