參數(shù)資料
型號(hào)： TDA7491HV
廠商： 意法半導(dǎo)體
英文描述： 20 W + 20 W dual BTL class-D audio amplifier
中文描述： 20瓦20瓦的雙橋接D類(lèi)音頻放大器
文件頁(yè)數(shù)： 23/26頁(yè)
文件大?。?/td> 869K
代理商： TDA7491HV
TDA7491HV
Application information
23/26
7.7
Protection function
The TDA7491HV is fully protected against over-voltages, under-voltages, over- currents and
thermal overloads as explained here. See also
Table 5: Electrical specifications on page 7
.
Over-voltage protection (OVP)
If the supply voltage exceeds 20 V (nominal) the over-voltage 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.
Under-voltage protection (UVP)
If the supply voltage drops below 4 V (nominal) the under-voltage protection is activated
which forces the outputs to the high-impedance state. When the supply voltage recovers the
device restarts.
Over-current protection (OCP)
If the output current exceeds 4 A (nominal) the over-current protection is activated which
forces the outputs to the high-impedance state. Periodically, the device attempts to restart. If
the over-current condition is still present then the OCP remains active. The restart time,
T
OC
, is determined by the R-C components connected to pin STBY.
Thermal protection (OTP)
If the junction temperature, T
j
, reaches 145° C (nominally), the device goes to mute mode
and the positive and negative PWM outputs are forced to 50% duty cycle. At Tj = 155° C
(nominally), 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 (< 20 V) by a pull-up
resistor whose value is limited by the maximum sinking current (200 μA) of the pin.
Figure 30.
Behavior of pin DIAG for various protection conditions
TDA7491HV
相關(guān)PDF資料
PDF描述
TDA7491HV13TR 20 W + 20 W dual BTL class-D audio amplifier
TDA7494S 10W AMPLIFIER
TDA7494 10W AMPLIFIER WITH DC VOLUME CONTROL
TDA7495S 11W+11W AMPLIFIER
TDA7495 11W+11W AMPLIFIER WITH DC VOLUME CONTROL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7491HV13TR 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(lèi)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
TDA7491LP 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(lèi)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
TDA7491LP13TR 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(lèi)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
TDA7491MV 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDA7491MV13TR 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*