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TIDM-02014: Sepic Converter design / GDU card design files

Andras Magyar
Intellectual 380 points
Part Number: TIDM-02014
Other Parts Discussed in Thread: UCC14240-Q1, LM5158-Q1, LM5157-Q1

Tool/software:

Dear Experts,

1. I would like to ask is a simple boost converter is recommended (can be used) instead of the SEPIC LM5158QRTERQ1 that was chosen to drive the gate driver UCC14240-Q1?

My boost converter choise would be like this:

https://www.ti.com/lit/ds/symlink/tps61175.pdf?ts=1726243341260&ref_url=https%253A%252F%252Fwww.ti.com%252Fpower-management%252Facdc-dcdc-converters%252Fproducts.html

Can you comment on this one? I know that most of the boost converters have limited input voltage range (lots of only up to 14V) but this one is up to 18V. It is important because of the 12V battery voltage varies of the car..

2. Can you provide the Altium project also for the gate driver unit (GDU) interface card?

Thanks and regards,

Andras Magyar

  • 0
    TI__Mastermind 27785 points

    I've been using LM5157-Q1 as a UCC14240-Q1 pre-regulator. LM5157-Q1, LM5158-Q1 are often shown in SPEIC  but can be used as boost converter topology. Automotive battery requirements vary but with regards to UCC14240-Q1, the battery voltage range is often specified above and below the input voltage limits of UCC14240 -Q1. This drives the need for a pre-regulator that can convert a wide battery voltage to an acceptable regulated input compatible with UCC14240-Q1. In some cases the battery voltage can vary between 6V<Vbat<40V which makes the SEPIC the best choice. If your battery voltage is always less than 24V, then maybe a boost converter is the right choice.

    Steve

  • 0 in reply to Steven Mappus1
    Intellectual 380 points

    Hi Steven,

    Thanks for you answer it is clear. I also asked if it is possible to get the Altium project of the GDU (Gate Driver Unit) PCB?

    Thanks,

    Andras

  • 0 in reply to Andras Magyar
    TI__Mastermind 27785 points

    This one might require a bit more info to access such as biz case, NDA, etc. What are you looking for exactly? If you submit a new E2E thread with the gate driver part number, your response will come from the gate driver team. I am working on the controllers team and do not have the same access to design files coming from the driver team.

    Steve