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參數(shù)資料
| 型號： | TDA7491P |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數(shù)： | 31/40頁 |
| 文件大小： | 714K |
| 代理商： | TDA7491P |
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TDA7491P
Applications information
Doc ID 13540 Rev 4
37/40
7.7
Protection function
The TDA7491P is fully protected against overvoltages, undervoltages, overcurrents and
thermal overloads as explained here.
Overvoltage protection (OVP)
page 10 the overvoltage protection is activated which forces the outputs to the
high-impedance state. When the supply voltage drops to below the threshold value the
device restarts.
Undervoltage protection (UVP)
specifications on page 10 the undervoltage protection is activated which forces the outputs
to the high-impedance state. When the supply voltage recovers the device restarts.
Overcurrent protection (OCP)
page 10 the overcurrent protection is activated which forces the outputs to the
high-impedance state. Periodically, the device attempts to restart. If the overcurrent
condition is still present then the OCP remains active. The restart time, TOC, is determined
by the R-C components connected to pin STBY.
Thermal protection (OTP)
If the junction temperature, Tj, reaches 145 °C (nominal), the device goes to mute mode and
the positive and negative PWM outputs are forced to 50% duty cycle. If the junction
temperature reaches the value for Tj given in Table 5: Electrical specifications on page 10
the device shuts down and the output is forced to the high impedance state. When the
device cools sufficiently the device restarts.
7.8
Diagnostic output
The output pin DIAG is an open drain transistor. When the protection is activated it is in the
high-impedance state. The pin can be connected to a power supply (<18 V) by a pull-up
resistor whose value is limited by the maximum sinking current (200 A) of the pin.
Figure 57.
Behavior of pin DIAG for various protection conditions
TDA7491P
Protection logic
R1
DIAG
VDD
Overcurrent
protection
Restart
OV, UV, OT
protection
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TDA7491P13TR | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7492 | 功能描述:音頻放大器 50W + 50W Dual BTL Class-D 4-Select dB 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 |
| TDA749213TR | 功能描述:音頻放大器 50W + 50W Dual BTL Class-D 4-Select dB 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 |
| TDA7492ETR | 功能描述:IC AUDIO AMP CLASS D 36POWERSSO 制造商:stmicroelectronics 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:D 類 輸出類型:1-通道（單聲道） 不同負(fù)載時的最大輸出功率 x 通道數(shù):50W x 1 @ 6 歐姆 電壓 - 電源:10 V ~ 26 V 特性:消除爆音，差分輸入，靜音，短路和熱保護(hù)，待機(jī) 安裝類型:表面貼裝 工作溫度:0°C ~ 70°C（TA） 供應(yīng)商器件封裝:PowerSSO-36 EPU 封裝/外殼:36-FSOP（0.295"，7.50mm 寬）裸露焊盤 標(biāo)準(zhǔn)包裝:1 |
| TDA7492MV | 功能描述:音頻放大器 50W Mono BTL Class D 10 to 26V 4Select dB 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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