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参数资料
| 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： | 15/40页 |
| 文件大小： | 579K |
| 代理商： | TB2902HQ |
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TB2902HQ
2006-04-28
22
7. Caution for use
Turn on diagnosis mode
The comparator detect the voltage between speaker both ends.
If that voltage is larger, this detector judges “output load open”, while, if it is smaller, this detector judges
the “short load”.
But, in case of output shorted to VCC or shorted to GND condition, the voltage between speaker will be
surely changed.
Therefore, this system can not present exact information, for example, "Short to VCC" and "Short load"
are showed though output is shorted to Vcc but no short load.
In this case, the result as DET2 shall be dropped or ignored and DET1 is effective as DET1 is prior to
DET2.
Permanent diagnosis mode
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.>
Automatic turn on muting
The automatic turn on muting operates from when the turn on write command is sent, it is continued until
the Pin 10 ripple pin voltage reaches to about 5.6V.
During this automatic turn on muting operation, output sound can not appear even if the mute off write
command is sent because the internal muting circuit operates.
The automatic turn on muting operation period is MIN=0.1 sec, MAX=1.0 sec in case of C2 (Pin 10)
= 10 uF, Vcc=9 to 18V and Tj = -40 to 150 degrees condition.
When the Turn on diagnosis is enable, the automatic muting period starts after Turn on diag cycle period.
This period is in proportion to the value of the C2 so that the characteristic of C2 shall be had a care, for
example, temperature, variation and so on.
AMP
DET circuit 1
(VCC/GND short)
DET circuit 2
(short/open)
AMP
OUT
SP
<Output stage>
AMP
S
5 V
I
= constant current
Comparator
<RL short/open detector, at TURN-on mode>
Figure 11 Automatic Turn on Muting Timing Chart
WRITE DATA
Pin10 ripple pin
Voltage=5.6V →
Turn ON diagnosis enable
Turn ON diagnosis defeat
Automatic Turn ON Muting
at Turn on diag defeat
Possible to play music if the mute off write command is sent
at Turn on diag defeat
Automatic Turn ON Muting
at Turn on diag enable
Possible to play music if the mute off write command is sent at Turn on diag enable
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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