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TPS2H160-Q1: What is the difference between load switch and high side switch in TI's product classification?

Hui Chen
Intellectual 430 points
Part Number: TPS2H160-Q1

Hi

What is the difference between load switch and high side switch in TI's power switch product classification?

load switch：https://www.ti.com/power-management/power-switches/load-switches/overview.html

high side switch: https://www.ti.com/power-management/power-switches/high-side-switches/overview.html

Thanks

Regards.

  • 0
    Intellectual 430 points

    To clarify my confusion more , I mean that many load switches also use high side MOSFETs as switch control elements. Why are they classified as load switches? But the others are classified as high side switches?  What is the main basis for classification?

  • 0
    TI__Expert 4260 points

    Hi Hui,

    Attached below is a table showing the differences between load switches and high-side switches in terms of functionality and characteristics.

    In addition to that, the two power switches are used for different applications. Load switches are primarily used for power distribution while high-side switches are used for output power protection. High-side switches have an additional V_ds clamp, that handles inductive off-board loads comfortably. It is used as a protection for any inductive, capacitive or resistive loads.

     Regards, 

    Dhanya

  • 0 in reply to Dhanyasree Prem Sankar
    Intellectual 430 points

    Thank you for your clarification.

    From your table, it seems that high side switch covers most of the functions of load switch, so can high side switch also be used on-board as a load switch?

    There is another question. In our common applications, when discrete components are used to build high side switche circuit, P-MOSFET is usually used. But I found that in TI's integrated high side switch products, N-MOSFET is often used as the switching MOSFET working with a internal charge pump. What is the reason?

  • +1 in reply to Hui Chen
    TI__Expert 4260 points

    Hi Hui, 

    Yes, you can use a high-side switch as a load switch. It fulfils the purpose but has additional functionality. 

    With regards to TI using N-MOSFET is more of a cost decision. Using a N-MOSFET is better in terms of cost and also has a charge pump for biasing the gate voltage. 

    Thanks, 

    Dhanya