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Original question:

[参考译文] TPS929240-Q1：TPS929240芯片内部温度传感器温度

TPS929240-Q1: Backup drive channel uses NTC to detect temperature

a b
Prodigy 40 points
Part Number: TPS929240-Q1


When using the backup drive channel to detect temperature with NTC, ENOUTXn is 1 and PWM is maximum. Will the chip report an open circuit fault？

  • 0
    TI__Mastermind 31555 points

    Hi，

    Thank you for your interest in TI products! In order to solve your problem more effectively, I need some more time to look at this chip, which will be answered for you later.

  • 0 回复 Lydia
    TI__Mastermind 31555 points

    Hi,

    What is your channel voltage range? PWM is maximum means 100%?

    Please see the LED open-circuit fault detection criteria, and 6.3.6.8 LED Open-Circuit Diagnostics in NORMAL state of the datasheet. The open fault can be triggered under certain conditions. Many thanks!

  • 0 回复 Lydia
    Prodigy 40 points

    如果不进行物理测试，就无法确定通道的电压范围。最大 PWM 为 OUT 寄存器的低位0x0F，高位为 0xFF。
    即使 ENOUTXn 为 0，能否达到使用备份驱动器通道通过 NTC 检测温度的目的

  • 0 回复 a b
    TI__Mastermind 31555 points

    如果您的工作条件不符合开路检测条件，则不会触发，这与您设计的NTC电压范围有关。

    此外，如果错误触发，您可以忽略MCU侧此通道的开路故障标志以避免故障，但请注意输出电压范围，因为开路故障也是电压警告。 非常感谢！