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Recommended PMIC for 1W dynamo input (kinetic source)

Dawson Eng
Prodigy 50 points
Other Parts Discussed in Thread: LM34936, TPS55288

Hello,

This is a new design.

I am looking for a PMIC that is able to harvest kinetic power from a 1W dynamo (input source will be from a vehicle's wheel).

It has a Max 25 Vpp and can only output about 300mA.

My objective is to harvest any amount of energy whenever the dynamo is running.

At low speed, it can generate as low as 0.05W and the PMIC has to capture this ultra low power as a storage.

Since it has a high Vpp, a rectification circuit is required and has to step down to 5V (sort of a buck-boost)

The application is to power up a device which has a GPS signal.

I also have a non-rechargeable battery to act as a back up in a form of a switching in case the PMIC fails to work.

If there isn't any reference design for my requirement, is there any other similar PMIC that is used for dynamo/stepper motor etc?

Hope to hear from you soon.

Thank you.

Regards

Dawson

 

  • 0
    TI__Genius 12735 points

    Hi Dawson,

    Can you clarify what the exact input and output requirements for the PMIC would be? I have not seen any applications like this in the past and I want to make sure I make an appropriate recommendation. Are there multiple outputs required? Will you need a boost or buck only?

    Best regards,

    Layne J

  • 0 in reply to Layne J
    Prodigy 50 points

    Hi Layne,

    Input:

    Will be from kinetic driven sources such as dynamo/stepper motor.

    Preferably with a buck-boost converter.  

    4 to 25 Vdc (after rectification)

    Output:

    5V output that can reach up to 300mA.

    Only 1 output source.

    In addition:

    If the PMIC does come with a battery charger function of charging current up to 300mA AND/OR supercapacitor storage, please do recommend as well.

    Thank you

    Regards

    Dawson

  • 0 in reply to Dawson Eng
    TI__Mastermind 30310 points

    Hi Dawson,

    I have re-assigned this question to a team that focuses on single-rail power management ICs.

    Since this question had PMIC in the title and no part # to refer to, it was mistakenly assigned to that team that Layne and I belong to, which focuses on multi-rail PMICs that are typically used to power complex processors. Since this is not our area of focus, I have reassigned your question to another group who might be more experienced in the application of power harvesting.

  • 0 in reply to Brian Berner
    TI__Mastermind 36901 points

    Dear All,

    BSR-LV supports buck converter with Vin < 7V so I'm re-assigning the thread to Buck-boost team.

    Best regards,

    Excel

  • 0 in reply to Excel Regidor
    TI__Guru 65300 points

    Hello Dawson,

    LM34936 might be a good candidate for your application. The device regulates the output voltage and can limit the average output current.

    Another candidate would be TPS55288 which has integrated MOSFETs.