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TPS4H160-Q1: Radiation in Low Earth Orbit

Charles Sommer
Prodigy 81 points
Part Number: TPS4H160-Q1
Other Parts Discussed in Thread: TPS22921, TPS1HB08-Q1, TPS1H100-Q1

Hi TI E2E Team,

Our project would like to use TPS4H160, TPS2H160, and TPS1HB08 in a Low Earth Orbit (LEO) space application, to switch 28V lines.

Do you know if these high side switches have ever been radiation tested, or used in LEO spacecrafts?

TPS22921 has been radiation tested by JPL, and did not see destructive Single Event Latchups at 44 MeV.cm2/mg: https://ieeexplore.ieee.org/document/8115429

Is the architecture and manufacturing process similar for these high side switches, meaning, can we consider that TPS4H160, TPS2H160, and TPS1HB08 will behave similarly?

Best regards,

Charles

  • 0
    TI__Genius 13300 points

    Hello Charles,

    We do not recommend operating the TPS1HB08-Q1 device at 28v. The nominal operating range of that device is from 6-18v. The extended operating range (as low as 3v up to a max of 28v) is there for events such as cold start and load dump. For these devices we do not gather data for those tests and therefore cannot guarantee how they may behave under those test conditions.

    Regards,

    Kalin Burnside

  • 0 in reply to Kalin Burnside
    Prodigy 81 points

    Hi Kalin,

    Many thanks for your answer.
    Only TPS1HB08-Q1 does not operate nominally at 28V, but the others do, correct?
    Do you know of switches that are rated for 28V and LEO conditions?

    Best,
    Charles

  • 0 in reply to Charles Sommer
    TI__Genius 13300 points

    Hello Charles,

    TPSxHxx devices can operate at 28v, but any TPSxHBxx or TPSxHAxx devices will not. Our lowest Ron device that supports 28v nominal is the TPS1H100-Q1. We do not have any High Side Switches that have been tested for LEO conditions. 

    Regards,

    Kalin Burnside