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參數(shù)資料
| 型號： | TDA7566 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 60 W, 4 CHANNEL, AUDIO AMPLIFIER, ZFM25 |
| 封裝： | ROHS COMPLIANT, FLEXIWATT-25 |
| 文件頁數(shù)： | 6/29頁 |
| 文件大小： | 364K |
| 代理商： | TDA7566 |
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Diagnostics functional description
TDA7566
Doc ID 9801Rev 5
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:
Figure 20.
Thresholds for short across the speaker/open speaker
If the Line-Driver mode (Gv= 12 dB and Line Driver Mode diagnostic = 1) is selected, the
same thresholds will change as follows:
Figure 21.
Thresholds for line-drivers
4.2
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
–
AC diagnostic
The TDA7566 has 2 operating statuses:
1.
Restart mode. The diagnostic is not enabled. Each audio channel operates
independently from each other. 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 (Figure 22).
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 (Figure 23):
–
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 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
S.C. across Load
x
Open Load
0V
1.65
Ω
45
Ω
Infinite
x
Normal Operation
0.5
Ω
85
Ω
AC00566
D02AU1340
S.C. across Load
x
Open Load
0
Ω
7
Ω
180
Ω
infinite
x
Normal Operation
2
Ω
330
Ω
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7566_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4x40W multifunction quad power amplifier with built-in diagnostics features |
| TDA7566_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 x 40 W multifunction quad power amplifier with built-in diagnostics features |
| TDA7567PD | 功能描述:音頻放大器 4 x 50W Multi Quad Built-in Diagnostic 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 |
| TDA7567PDTR | 功能描述:音頻放大器 4 x 50W Multi Quad Built-in Diagnostic 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 |
| TDA7569BLV | 功能描述:Amplifier IC 4-Channel (Quad) Class AB 27-Flexiwatt (Vertical) 制造商:stmicroelectronics 系列:- 包裝:管件 零件狀態(tài):有效 類型:AB 類 輸出類型:4-通道（四路） 不同負(fù)載時的最大輸出功率 x 通道數(shù):50W x 4 @ 4 歐姆 電壓 - 電源:6 V ~ 18 V 特性:靜音，短路和熱保護(hù) 安裝類型:通孔 工作溫度:-40°C ~ 105°C（TA） 供應(yīng)商器件封裝:27 Flexiwatt（垂直） 封裝/外殼:27 Flexiwatt（成型引線） 標(biāo)準(zhǔn)包裝:17 |
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