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TPS37-Q1: TPS37-Q1

CHandana S R Naik
Prodigy 30 points
Part Number: TPS37-Q1

Tool/software:

Automotive 65-V window supervisor with ultra-low quiescent current and time-delay function 

In the TPS37-Q1 Automotive 65-V window supervisor IC with ultra-low quiescent current and time-delay function, can VDD and VMON be connected to the same voltage source, or are they required to be powered by separate voltage rails?

  • 0
    TI__Expert 8630 points

    Hello,

    VDD and VMON can be connected to the same voltage source.

    Thanks,

    Jackson

  • 0 in reply to Jackson Wightman
    Prodigy 185 points

    WHAT IS THE RESET ASSERT VOLTAGE AND  RESET RELEASE VOLTAGE. It is mentioned as both Vmon ie before the voltage divider? in that case i am getting negative resistors values. I am monitoring 15V rail and under voltage level is 14V and over voltage level is 16V. How can i configure it then?

  • 0 in reply to Hridya TV
    TI__Expert 8630 points

    Hello,

    For TPS37-Q1, some options have only undervoltage (UV) options, and some have both UV and overvoltage (OV) options. For a part number that has both UV and OV options where the voltage threshold can be configured by resistors, please use TPS37A010122DSKRQ1 .

    To calculate the resistor values for the divider from VMON/VDD (since they are connected in your circuit), please see section 10.1 of the TPS37-Q1 datasheet.

    For a configuration where the UV threshold is 14V and the OV threshold is 15V, please consider this configuration with VMON connected to VDD:

    The tool does seem to have some fixes that need to be made, so please refer to the datasheet section 10.1 for now for resistor calculations. Section 10.1 provides formulas that can help calculate the resistor value you need for your system.

    Additionally, here is some clarity on the terms you asked about:

    1. Reset Release Voltage: VITN (UV) + VHYS for UV

                                               VITP (OV) + VHYS for OV

    2. Reset Assert Voltage: VITN (UV) for UV

                                           VITP (OV) for OV

    These terms are clarified in Figure 7-2 in the datasheet for UV:

    These terms are clarified in Figure 7-3 for OV:

    Please let me know if you have any other questions.

    Thanks,

    Jackson