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參數(shù)資料
| 型號： | TDA7563PD |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES |
| 中文描述： | 多功能四功率放大器，內(nèi)置診斷特征 |
| 文件頁數(shù)： | 11/21頁 |
| 文件大小： | 213K |
| 代理商： | TDA7563PD |
11/21
TDA7563PD
2 DIAGNOSTIC mode. It is enabled via I
2
C bus and self activates if an output overload (such to cause
the intervention of the short-circuit protection) occurs to the speakers outputs . Once activated, the di-
agnostics procedure develops as follows (fig. 26):
– To avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output sta-
tus is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not performed and
the channel returns back active.
– Instead, if an overload is detected during the check after 1 ms, then a diagnostic cycle having a duration
of about 100 ms is started.
– After a diagnostic cycle, the audio channel interested by the fault is switched to RESTART mode. The
relevant data are stored inside the device and can be read by the microprocessor. When one cycle has
terminated, the next one is activated by an I
2
C reading. This is to ensure continuous diagnostics
throughout the car-radio operating time.
– To check the status of the device a sampling system is needed. The timing is chosen at microprocessor
level (over half a second is recommended).
Figure 25. Restart timing without Diagnostic Enable (Permanent) - Each 1mS time, a sampling of
the fault is done
Figure 26. Restart timing with Diagnostic Enable (Permanent)
4
Any DC output offset exceeding ±2 V are signalled out. This inconvenient might occur as a consequence of ini-
tially defective or aged and worn-out input capacitors feeding a DC component to the inputs, so putting the
speakers at risk of overheating.
This diagnostic has to be performed with low-level output AC signal (or Vin = 0).
The test is run with selectable time duration by microprocessor (from a "start" to a "stop" command):
OUTPUT DC OFFSET DETECTION
t
1-2mS
1mS
1mS
1mS
1mS
Overcurrent and short
circuit protection intervention
(i.e. short circuit to GND)
Short circuit removed
Out
t
Overcurrent and short
circuit protection intervention
(i.e. short circuit to GND)
Short circuit removed
1-2mS
100/200mS
1mS
1mS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7563PDTR | 功能描述:音頻放大器 MULTIFUNCTION QUAD Pwr AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| TDA7564 | 功能描述:音頻放大器 Quad Power Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| TDA7564B | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| TDA7564BH | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| TDA7564BPD | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
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