• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 63 subscribers
  • Views 388 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS2H160-Q1: Using TPS2H160A Part for 60V

Jil Jose
Prodigy 90 points
Part Number: TPS2H160-Q1
Other Parts Discussed in Thread: TPS1663

I know the maximum withstand voltage is 48V. But we need to support up to 60V may be for short time. Can we use a protection circuit using zener by which the chip GND will be elevated and maximum voltage across logic area (area other than MOSFET inside the chip) will be around 5V only. Load GND will be different from chip GND. Control / status signals are fed through opto-coupler to refer to chip GND. Will it work this way? Voltage between VSx and OUTx can be 60V?

  • 0
    TI__Mastermind 32650 points

    Hi Jil,

    We do not recommend this operation as the power FET and the protective features may fail. What is your application? I think an eFuse offering might fulfill your requirements. Is your load inductive in nature? Is this for a digital output function?

    Have you looked at the TPS1663 eFuse? This device is rated for 60V and has similar protective and diagnostic features.

  • 0 in reply to Shreyas Dmello
    TI__Mastermind 32650 points

    Hi Jil,

    I just wanted to follow up on this. Did the TPS1663 eFuse match your requirements?

  • 0 in reply to Shreyas Dmello
    Prodigy 90 points

    I afraid it is not satisfying our requirement. Adding a component for 60V protection adds cost and also functional safety complexities as this component needs to be diagnosed at an interval of time. We need 2 or 4 channel driver which operates from 8V to 35V and withstands till 60V. During 35V to 60V it is not needed to operate properly (always OFF is acceptable) but it should not damage the circuit. Other manufacture's similar ICs, it has recommended for a floating GND mechanism.

  • 0 in reply to Jil Jose
    TI__Mastermind 32650 points

    Hi Jil,

    TPS2H160 will work in a floating ground operation but may result in undesired operation. While the control stage will work as intended, the power stage may not. The device has a 50V clamp from input to output. In the event that then input voltage goes above 50V on the input, the clamp turns on. 

    In this operating region, the FET and controller is kept safe but there will be a current path from input to output. 

    In the worst case scenario in your application, a 60V input will result in the clamp turning on and an effective voltage of 10V placed across the load.

    If this behavior is acceptable, then using a 12V zener on IC GND is fine. If this behavior is unacceptable then I think the eFuse offerings are your best bet.