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參數(shù)資料
| 型號(hào)： | TDA7562 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 38 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM27 |
| 封裝： | FLEXIWATT-27 |
| 文件頁數(shù)： | 16/17頁 |
| 文件大?。?/td> | 202K |
| 代理商： | TDA7562 |
TDA7562
8/17
DIAGNOSTICS FUNCTIONAL DESCRIPTION:
Detectable conventional faults are:
– SHORT TO GND
– SHORT TO Vs
– SHORT ACROSS THE SPEAKER
The following additional features are provided:
– OUTPUT OFFSET DETECTION
The TDA7562 has 2 operating statuses:
1)) RESTART mode. The diagnostic is not enabled. Each audio channel operates independently from each oth-
er. If any of the a.m. faults occurs, only the channel(s) interested is shut down. A check of the output status
is made every 1 ms (fig. 14). Restart takes place when the overload is removed.
2)) DIAGNOSTIC mode. It is enabled via I2C 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 diagnostics
procedure develops as follows (fig. 15):
– To avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output
status is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not per-
formed and the channel returns back active.
– Instead, if an overload is detected during the check after 1 ms, then a diagnostic cycle having a du-
ration 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 I2C 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 microproces-
sor level (over half a second is recommended).
Figure 14. Restart timing without Diagnostic Enable (Each 1mS time, a sampling of the fault is done)
Figure 15. Restart timing with Diagnostic Enable
t
1-2mS
1mS
Overcurrent and short
circuit protection intervention
(i.e. short circuit to GND)
Short circuit removed
Out
t
Overcurrent and short
(i.e. short circuit to GND)
Short circuit removed
1mS
100mS
1mS
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| TDA7563AH | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
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| TDA7563ASMTR | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
| TDA7563ASM | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
| TDA7563A | 50 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM27 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7562B | 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 |
| TDA7563 | 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 |
| TDA7563A | 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 |
| TDA7563AH | 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 |
| TDA7563APD | 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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