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DRV104: Operating temperature

Lorenzo Lutti
Intellectual 665 points
Part Number: DRV104
Other Parts Discussed in Thread: TPS57140-EP

Hello, I would like to use the DRV104 in an application with a minimum operating temperature of –55°C, but I'm quite confused whether this can be done or not.

The datasheet reports an absolute maximum rating for the operating temperature of –55°C to +125°C, and a "specified" temperature range of –40°C to +85°C. This does not make much sense, especially considering that all the electrical characteristics on the datasheet are specified only at 25 °C (not in the entire "specified" range), and also all the figures show data down to –60°C.

Can you clarify? Can this part be actually used at –55°C, and if so, what are the limitations as opposed to operating it at –40°C?

Thank you.

L.

  • 0
    TI__Mastermind 32650 points

    Hi Larry,

    I think the device will function at -55C but the figures provided are only based of data collected of a subset of devices.

    The absolute minimum operating temperature is -55C and so the operation is marginal at this temperature. Any lower temperatures could result in device damage.

    If you can keep the temperature of operation to -40C or above, this concern is removed as both the device and the package are specified at this temperature.

  • 0 in reply to Shreyas Dmello
    Intellectual 665 points

    Thank you. So basically TI does not recommend using this part at -55 C.

    Are there any protected high side switches specified for -55 C in your portfolio? I was not able to find any.

    Actually it appears that no manufacturer has them anymore. ST and IRF/Infineon used to make them, but for some reason they are all discontinued with no new replacements.

    L.

  • 0 in reply to Lorenzo Lutti
    TI__Mastermind 32650 points

    Hi Larry,

    For integrated high side switches, most device max out at -40C for recommended operating temperatures. For operating at -55C, I believe you need some sort of extended operation/temperature device. Since you are looking at a driver, there may be an option for you in the Solenoid Drivers product line.

    Please find their products here: https://www.ti.com/motor-drivers/solenoid/overview.html 

  • 0 in reply to Shreyas Dmello
    Intellectual 665 points

    Unfortunately, nothing seems suitable either.

    The only solution I can imagine is to use a buck converter IC that supports 100% PWM operation (for example the TPS57140-EP) and driving it in "open loop", i.e. forcing the feedback input to ground in order to force a 100% PWM output, and then switching it on/off with the enable input. However this seems very wrong and convoluted, and I have doubts that the controller will play ball when used in such a bizarre way.

    At this point I will design a custom circuit. This is very annoying for size/reliability reasons, but I cannot see any real alternative.

    L.

  • 0 in reply to Lorenzo Lutti
    TI__Mastermind 32650 points

    Hi Larry,

    Apologies for the inconvenience.

    We will take this feedback about operating temperature ranges into consideration for our future devices.

    I will close out this thread but please feel free to ask any question you have on E2E about TI devices.