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Original question:

TPS1HA08-Q1: Specifications at 24Vin operation

TPS1HA08-Q1 : Application Circuit

JungHoon Park1
Prodigy 80 points
Part Number: TPS1HA08-Q1

Hello.

I would like to use 23.1V ~ 29.4V battery power to drive the motor.

I want to connect this battery power directly to the motor's controller power.

In other words, I want to use the TPS1HA08-Q1 to turn on/off the 24V 20A (peak current) motor.

Can I use the TPS1HA08-Q1 in the above situation?

If you can use it, what should you see and reference for a simplified schematic?

Thank you.

JungHoon.

  • 0
    TI__Mastermind 23410 points

    Hi JungHoon and welcome to E2E!

    Just for clarification, I see you've mentioned "motor's controller" to provide power. Are you providing power to a motor directly or a motor driver? To give a better recommendation, would you be able to provide the expected steady state load current? 

  • 0 in reply to Anthony P Pham
    Prodigy 80 points

    Hi Anthony Pham

    The power supply flow is as follows.

    Battery -> Load SW -> Motor's Controller -> Motor

    The basic load current of the motor does not exceed 10A.

    However, the peak current is 20A in the motor datasheet.

    Regards,

    JungHoon

  • 0 in reply to JungHoon Park1
    TI__Mastermind 23410 points

    Hi JungHoon,

    Since you have the motor datasheet, would you be able to share the characteristics of the motor if possible? Characteristics would be values such as capacitance, inductance, and/or resistance.

    If not, then based on your current information (DC load current 10A and 20A peak current), the TPS1HA08 would be find if you are working at ambient temperatures less than an estimated 95C.

    Also be aware that as the supply voltage you've mentioned is 24V, you are operating in the extended voltage range. Short-to-GND protection is not guaranteed and the device is not guaranteed to service. 

  • 0 in reply to Anthony P Pham
    Prodigy 80 points

    Hi Anthony Pham

    The circuit diagram created by referring to the data sheet is shown in the figure below.

    The motor data sheet is also attached.

    Are there any parts of the schematic that need to be supplemented?

    Regards,

    JungHoon

    K9LH100N2-04-RㅁD193L,R.pdf

  • 0 in reply to JungHoon Park1
    TI__Mastermind 23410 points

    Hi Junghoon,

    I'm not sure I'll be able to completely answer the question of being able to drive this motor directly as it does not give me information such as inductance or capacitance. As mentioned previously, it will be able to handle 10A at ambient temps less than about 95C and limit current if it exceeds the internal 20A current limit.

    For your schematic, we do recommend that there be some sort of reverse current protection, either a blocking diode at the input or a resistor-diode GND network. I noticed that you have DNI for R7, we recommend grounding this resistor as the SEL2 pin requires a path to GND to allow for protection in a reverse battery event that allows the device to automatically switch-on to reduce power over the body-diode.