參數(shù)資料
型號(hào)： TDA7564
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(yè)數(shù)： 11/20頁(yè)
文件大?。?/td> 248K
代理商： TDA7564
11/20
TDA7564
– 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 19. Restart timing without Diagnostic Enable (Permanent) - Each 1mS time, a sampling of
the fault is done
Figure 20. Restart timing with Diagnostic Enable (Permanent)
OUTPUT DC OFFSET DETECTION
Any DC output offset exceeding ±2V 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):
– START = Last reading operation or setting IB1 - D5 - (OFFSET enable) to 1
– STOP = Actual reading operation
Excess offset is signalled out if persistent throughout the assigned testing time. This feature is disabled if any
overloads leading to activation of the short-circuit protection occurs in the process.
AC DIAGNOSTIC.
It is targeted at detecting accidental disconnection of tweeters in 2-way speaker and, more in general, presence
of capacitively (AC) coupled loads.
This diagnostic is based on the notion that the overall speaker's impedance (woofer + parallel tweeter) will tend
to increase towards high frequencies if the tweeter gets disconnected, because the remaining speaker (woofer)
would be out of its operating range (high impedance). The diagnostic decision is made according to peak output
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
相關(guān)PDF資料
PDF描述
TDA7565 QUAD POWER AMPLIFIER WITH BUILT-IN VOLTAGE CONVERTER
TDA7566 MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES
TDA7575PD MULTIFUNCTION DUAL BRIDGE POWER AMPLIFIER WITH INTEGRATED DIGITAL DIAGNOSTICS
TDA7580 FM/AM DIGITAL IF SAMPLING PROCESSOR
TDA7701 BATTERY OPERATED FULLY INTEGRATED FM TUNER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
TDA7564BPDTR 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
TDA7565 功能描述:音頻放大器 Quad Power Amplifier Built-in Volt Conv 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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