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參數(shù)資料
| 型號： | TDA7498 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 100 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 745K |
| 代理商： | TDA7498 |
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TDA7498
Applications information
Doc ID 16107 Rev 4
25/29
5.7
Protection function
The TDA7498 is fully protected against overvoltages, undervoltages, overcurrents and
thermal overloads as explained here.
Overvoltage protection (OVP)
page 8 the overvoltage protection is activated which forces the outputs to the
high-impedance state. When the supply voltage falls back to within the operating range the
device restarts.
Undervoltage protection (UVP)
specifications on page 8 the undervoltage protection is activated which forces the outputs to
the high-impedance state. When the supply voltage recovers to within the operating range
the device restarts.
Overcurrent protection (OCP)
page 8 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 (nominally), the device goes to mute mode
and the positive and negative PWM outputs are forced to 50% duty cycle. If the junction
device shuts down and the output is forced to the high-impedance state. When the device
cools sufficiently the device restarts.
5.8
Diagnostic output
The output pin DIAG is an open drain transistor. When any protection is activated it switches
to the high-impedance state. The pin can be connected to a power supply (< 39 V) by a
pull-up resistor whose value is limited by the maximum sinking current (200 A) of the pin.
Figure 27.
Behavior of pin DIAG for various protection conditions
TDA7498
Protection logic
R1
DIAG
VDD
Overcurrent
protection
Restart
OV, UV, OT
protection
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相關代理商/技術參數(shù) |
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|---|---|
| TDA7498E | 功能描述:音頻放大器 160W 160W Dual BTL ClassD Audio 20mV RoHS:否 制造商:STMicroelectronics 產品: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 |
| TDA7498ETR | 功能描述:音頻放大器 160-Watt 160-Watt Dual BTL Class D Amp RoHS:否 制造商:STMicroelectronics 產品: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 |
| TDA7498L | 功能描述:音頻放大器 80W and 80W Dual BTL Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產品: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 |
| TDA7498LTR | 功能描述:音頻放大器 80W and 80W Dual BTL Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產品: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 |
| TDA7498MV | 功能描述:音頻放大器 100-watt mono BTL Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產品: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 |
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