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參數(shù)資料
| 型號： | TDA7575 |
| 廠商： | 意法半導體 |
| 元件分類： | 音頻放大器 |
| 英文描述： | MULTIFUNCTION DUAL BRIDGE POWER AMPLIFIER WITH INTEGRATED DIGITAL DIAGNOSTICS |
| 中文描述： | 多功能雙橋功率放大器，集成了數(shù)字診斷 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 193K |
| 代理商： | TDA7575 |
13/17
TDA7575
The information related to the outputs status is read and memorized at the end of the current pulse top. The
acquisition time is 100 ms (typ.). No audible noise is generated in the process. As for SHORT TO GND / Vs the
fault-detection thresholds remain unchanged from 26 dB to 12 dB gain setting. They are as follows:
Concerning SHORT ACROSS THE SPEAKER / OPEN SPEAKER, the threshold varies from 26 dB to 12 dB
gain setting, since different loads are expected (either normal speaker's impedance or high impedance). The
values in case of 26 dB gain are as follows:
If the Line-Driver mode (Gv= 12 dB and Line Driver Mode diagnostic = 1) is selected, the same thresholds will
change as follows:
b) PERMANENT DIAGNOSTICS
.
Detectable conventional faults are:
– SHORT TO GND
– SHORT TO Vs
– SHORT ACROSS THE SPEAKER
The following additional features are provided:
– OUTPUT OFFSET DETECTION
The TDA7575 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. G). Restart takes place when the overload is removed.
2) DIAGNOSTIC mode. It is enabled via I
2
C bus and self activates if an output overload (such to cause the in-
tervention of the short-circuit protection) occurs to the speakers outputs . Once activated, the diagnostics pro-
cedure develops as follows (fig. H):
– 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
D02AU1341
S.C. to GND
x
S.C. to Vs
0V
1.8V
V
S
-1.5V
V
S
x
Normal Operation
1.2V
V
S
-0.9V
S.C. across Load
x
Open Load
0V
1.5
70
Infinite
x
Normal Operation
0.5
130
D01AU1254
D01AU1252
S.C. across Load
x
Open Load
0
4.5
200
infinite
x
Normal Operation
1.5
400
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7575B | 功能描述:音頻放大器 2 x 75W Multifunct Dual-Bridge 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7575BPD | 功能描述:音頻放大器 2 x 75W Multifunct Dual-Bridge 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7575BPDTR | 功能描述:音頻放大器 2 x 75W Multifunct Dual-Bridge 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7575PD | 功能描述:音頻放大器 INFOTAINMENT S PWR 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7575PDTR | 功能描述:音頻放大器 INFOTAINMENT S PWR 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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