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参数资料
| 型号： | TDA7564BH |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| 封装： | ROHS COMPLIANT, FLEXIWATT-25 |
| 文件页数： | 11/34页 |
| 文件大小： | 493K |
| 代理商： | TDA7564BH |
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TDA7564B
Multiple faults
Doc ID 12734 Rev 3
5
Multiple faults
When more misconnections are simultaneously in place at the audio outputs, it is
guaranteed that at least one of them is initially read out. The others are notified after
successive cycles of I2C reading and faults removal, provided that the diagnostic is enabled.
This is true for both kinds of diagnostic (turn-on and permanent).
The table below shows all the couples of double-fault possible. It should be taken into
account that a short circuit with the 4 ohm speaker unconnected is considered as double
fault.
S. GND (so) / S. GND (sk) in the above table make a distinction according to which of the 2
outputs is shorted to ground (test-current source side= so, test-current sink side = sk). More
precisely, in Channels LF and RR, so = CH+, sk = CH-; in Channels LR and RF, so = CH-, sk
= CH+.
In permanent diagnostic the table is the same, with only a difference concerning open
load (*), which is not among the recognizable faults. Should an Open Load be present
during the device's normal working, it would be detected at a subsequent Turn on Diagnostic
cycle (i.e. at the successive car radio turn-on).
5.1
Faults availability
All the results coming from I2C bus, by read operations, are the consequence of
measurements inside a defined period of time. If the fault is stable throughout the whole
period, it will be sent out.
To guarantee always resident functions, every kind of diagnostic cycles (turn-on, permanent,
offset) will be reactivate after any I2C reading operation. So, when the micro reads the I2C, a
new cycle will be able to start, but the read data will come from the previous diag. cycle (i.e.
The device is in turn-on state, with a short to GND, then the short is removed and micro
reads I2C. The short to GND is still present in bytes, because it is the result of the previous
cycle. If another I2C reading operation occurs, the bytes do not show the short). In general
to observe a change in diagnostic bytes, two I2C reading operations are necessary.
Table 5.
Double fault table for turn-on diagnostic
S. GND (so)
S. GND (sk)
S. Vs
S. Across L.
Open L.
S. GND (so)
S. GND
S. Vs + S.
GND
S. GND
S. GND (sk)
/
S. GND
S. Vs
S. GND
Open L. (*)
S. Vs
/
S. Vs
S. Across L.
/
S. Across L.
N.A.
Open L.
/
Open L. (*)
相关PDF资料 |
PDF描述 |
|---|---|
| TDA7564B | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| TDA7564BPDTR | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7564BPD | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7564 | 46 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TDA7565 | 40 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM27 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7564BPD | 功能描述:音频放大器 4 x 50W Multi Quad Power Amplifer D 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 |
| TDA7564BPDTR | 功能描述:音频放大器 4 x 50W Multi Quad Power Amplifer D 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 |
| TDA7565 | 功能描述:音频放大器 Quad Power Amplifier Built-in Volt Conv 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 |
| TDA7565_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Quad power amplifier with built-in voltage converter |
| TDA7565_10 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Quad power amplifier with integrated step-up converter |
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