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參數(shù)資料
| 型號(hào)： | TDA7350 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 22W BRIDGE-STEREO AMPLIFIER FOR CAR RADIO |
| 中文描述： | 22W橋，車內(nèi)廣播立體聲功放 |
| 文件頁(yè)數(shù)： | 14/22頁(yè) |
| 文件大?。?/td> | 324K |
| 代理商： | TDA7350 |
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BUILT-IN PROTECTION SYSTEMS
Short Circuit Protection
The maximum current the device can deliver can
be calculated by considering the voltage that may
be presentat the terminals of a car radio amplifier
and the minimum load impedance.
Apart from consideration concerning the area of
the power transistors it is not difficult to achieve
peak currents of this magnitude(5A peak).
However, it becomes more complicated if AC and
DC short circuit protection is also required.In par-
ticular,with a protection circuit which limits the
output current following the SOA curve of the out-
put transistors it is possible that in some condi-
tions (highly reactive loads, for example) the pro-
tection circuit may intervene during normal
operation. For this reason each amplifier has
been equipped with a protection circuit that inter-
veneswhen the output current exceeds4A.
Fig 34 shows the protection circuit for an NPN
power transistor (a symmetrical circuit applies to
PNP).The VBE of the power is monitored and
givesout a signal,availablethrough a cascode.
This cascode is used to avoid the intervention of
the short circuit protection when the saturation is
below a given limit.
The signal sets a flip-flopwhich forces the amplifier
outputsinto a highimpedancestate.
In case of DC short circuit when the short circuit
is removed the flip-flop is reset and restarts the
circuit (fig. 38). In case of AC short circuit or load
shorted in Bridge configuration, the device is con-
tinuously switched in ON/OFF conditions and the
currentis limited.
Figure33:
AmplifierBlock Diagram
Figure32:
A Classical Output Stage
Figure 34:
Circuitry for Short Circuit Detection
TDA7350A
14/22
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7360HS | 22W BRIDGE / STEREO AUDIO AMPLIFIER WITH CLIPPING DETECTOR |
| TDA7360 | 22W Bridge / Stereo Audio Amplifier with Clipping Detector(22W橋式立體聲音頻放大器帶限幅檢測(cè)器) |
| TDA7361 | Low Voltage NBFM IF System(低壓NBFM IF系統(tǒng)) |
| TDA7370B | Quad Power Amplifier for Car Radio(用于汽車收音機(jī)的四功率放大器) |
| TDA7370 | QUAD POWER AMPLIFIER FOR CAR RADIO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7350A | 功能描述:音頻放大器 10W Stereo 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 |
| TDA7350A_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:22W BRIDGE-STEREO AMPLIFIER FOR CAR RADIO |
| TDA7360 | 功能描述:音頻放大器 22W Stereo 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 |
| TDA7360HS | 功能描述:音頻放大器 18V Op 28V DC 36W 50V Supply 5A Output 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 |
| TDA7361 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW VOLTAGE NBFM IF SYSTEM |
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