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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
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TB9044FNG系统电源IC的框图。

低电压工作(VB:2.7V~),适用于ASIL D系统的传感器安全机制3通道电源

越来越多的汽车安全关键系统,比如电动助力转向(EPS)和制动系统,要求符合ASIL D[注1],这是ISO 26262功能安全标准中所规定的最高的汽车安全完整性等级。
新IC集成了各种故障检测功能以监测和防止IC自身故障,比如对于电源电路的高压、低压检测和过热检测,还集成了一个看门狗定时器以监测外部微控制器的故障。我们还结合了用于检测故障检测电路中潜在故障的初始诊断电路以保证更高的功能安全性。

注1:ASIL:汽车安全完整性等级

  • 降压增压预调节器
    (最小2.7V输入,6V输出,集成降压模式的驱动电路,升压模式的外部驱动电路)
  • 5V线性调节器
    (400mA,集成驱动电路)
  • 5V跟踪调节器
    (100mA×3通道,集成驱动电路)
  • 安全机制
    • 低压检测、高压检测、过电流检测、热关断
    • 窗口看门狗计时器
    • 初始诊断的内建自测试
  • SPI I/F允许读取安全机制的内部状态
  • 绝对最大电压
    40V(适用于甩负荷)
  • 推荐工作电压
    2.7V至18V
  • 工作温度
    Ta=-40至125°C
  • 封装:48引脚HTSSOP

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