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Original question:

TPS92601-Q1: TPS92601 working in higher input voltage

TPS92601-Q1: VIN max question

Chen Ching Yi
Prodigy 30 points
Part Number: TPS92601-Q1
Other Parts Discussed in Thread: LM3421-Q1, TPS92692-Q1

Hi Expert,

TPS92601-Q1 ia automotive headlights application, VIN max voltage is 40V in datasheet, but I search other multi-topology in headlights application VIN max is 65V or 75V.

ex: TPS92692-Q1 or LM3421-Q1, these part number also in headlights application. Why VIN range is higher than TPS92601-Q1?

In rear light applicatin, why VIN max voltage is 40V (ex: TPS9261x-Q1)? What is different VIN range between headlight and rear light application ?

BR,

Sara

  • 0
    TI__Mastermind 18550 points

    Hello BR,

    The TPS92601 is just designed for input of 40V max and that was the intend application of it.  While the other parts are designed for higher voltage.  You can choose the part that is appropriate for your application.

    Thanks Tuan

  • 0 in reply to Tuan Tran74
    Prodigy 30 points

    Thanks for your reply.

    But i still have question in TI application note slpy006b "LED Driver for Automotive exterior lighting applications) page 3 and page5.

    In page3 is for front lighting application, i see the diagram in LED Driver module input voltage  is 5.5V~65V. 

    In page5 is for rear lighting application, i see the diagram in LED Driver module input voltage  is 5V~40V. 

    Battery 12V in automotive, it need to consider cold crank and load dump. In battery protection circuit, the max voltage will be clamp to ~35V

    Why some part number like TPS92692-Q1 for automotive headlight application VIN max voltage is 65V ?

    Could you please explain more detail reason for TPS92692-Q1 VIN max voltage is 65V reason?

    I check TI all LED Driver solution for rear light VIN max is 40V

    Is head light and rear light have different Battery moduel architecture or any other reason?

    Thanks

    BR

    Sara 

  • 0 in reply to Chen Ching Yi
    TI__Mastermind 18550 points

    Chen,

    There are some applications that does not require cold crank or load dump or the input is clamped with TVS and you can use 40V parts.  It's up to the designer to use what is appropriate for their application.

    Thanks Tuan