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參數(shù)資料
| 型號： | TDA7350 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 22 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM11 |
| 封裝： | MULTIWATT-11 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 6631K |
| 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 present at 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-
venes when the output current exceeds 4A.
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
gives out a signal,available through 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-flop which forces the amplifier
outputs into a high impedance state.
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
current is limited.
Figure 33: Amplifier Block Diagram
Figure 32: A Classical Output Stage
Figure 34: Circuitry for Short Circuit Detection
TDA7350
14/22
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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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