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TPS55330 to supply DRV8801

PhilipLee
Prodigy 200 points
Other Parts Discussed in Thread: TPS55330, DRV8801

Hi,

I would like to use DRV8801 to drive a 12V solenoid and I am thinking about using TPS55330 to supply 12V to DRV8801 to drive the solenoid. Do I need to put a diode in-between TPS55330 and DRV8801 to protect TPS55330 from the regeneration current and voltage spike as a result of the solenoid (inductive load)?

However, when I read the post below (tips for solenoid driving), it appears one of the advantage of using DRV8801 is fast delay and the regeneration current is heading back to the supply (recirculation path). Would TPS55330 be able to handle this operation?

e2e.ti.com/.../tips-for-solenoid-driving

Thanks,

Philip

  • 0
    TI__Mastermind 35165 points

    Hi Philip,

    This should not be a problem for the TPS55330. Since the TPS55330 is non-synchronous the schottky diode would block any of the re circulation current and the output capacitors would absorb the energy. It would be important to make sure the voltage spike doesn't exceed the ratings of the schottky diode and the SW pin of the TPS55330.

    Best Regards,
    Anthony

  • 0 in reply to Anthony F
    Prodigy 200 points
    Thanks Anthony!

    Because I am driving a solenoid (require 1A), the inrush current will be large when I start driving the solenoid. Do you have any advice to avoid over-current protection with TPS55330 as a result of the inrush current other than using a large output capacitor and design the circuit for 3A?

    Philip