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Original question:

TPS7H5001-SP: Voltage Reference and Input Voltage

TPS7H5001-SP: Common Mode Range

Jorge Vega
Prodigy 80 points
Part Number: TPS7H5001-SP


Hello,  thanks in advance for your help with the TPS7H5001.  I have a few questions on the error amplifier and the CS_ILIM.

1. What is the input voltage common mode range where the parameters of the error amplifier are guaranteed?

2. What is the range of the error amplifier?  

3. The CS_ILIM has a top limit of 1.05V for protection.   What is the hysteresis margin? 

4. Is this device set or reset dominant?  The block diagram does not show the set-reset latch.

Thanks for your help,

Jorge Vega

  • 0
    TI__Mastermind 28915 points

    Hey Jorge,

    What type of application are you using the device for?
    Many of your questions imply to me that you are not using the part for a typical application.

    1. What is the input voltage common mode range where the parameters of the error amplifier are guaranteed?

    In a typical application the error amplifier common mode range is quite small, as the output voltage is divided down and made close to the internal voltage reference.
    Thus listing a common mode range for the parameters isn't usually required.
    Is there a specific parameter you are worried about?

    2. What is the range of the error amplifier?
    The output range is ~0-3.
    The ranged used depends on the voltage at CS_ILIM and the RSC pin.
    The voltage at CS_ILIM is multiplied by 2 and then a ~0.15 V offset is added then compared to the output of the error amplifier.
    The output of the error amplifier is lowered by the ramp created by the RSC pin.

    3. The CS_ILIM has a top limit of 1.05V for protection.   What is the hysteresis margin?
    There is no hysteresis because of how the pin works in a typical application.
    Once you hit the current limit the device will terminate the output pulse

    4. Is this device set or reset dominant?  The block diagram does not show the set-reset latch.
    Here is a resource on understanding how current mode control works.
    Figure 6 is going to be useful for you
    https://www.ti.com/lit/an/snva555/snva555.pdf?ts=1684374195207&ref_url=https%253A%252F%252Fwww.google.com%252F

    Thanks,
    Daniel