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LM5170-q1: LM5170-Q1 , (Can it be used in applications similar to the 4 Switch buck-boost converters unlike other Buck boost controller)

Bhargav jani
Intellectual 340 points
Part Number: LM5170-Q1
Other Parts Discussed in Thread: LM5170, LM25117, TPS40170-Q1

Hello all, 

I wish to use LM5170-Q1 (Multi phase controller ) , in  my system design . The aim is to create switch mode power supply . As this IC can be digitally controlled via PWM. And meets the input and output Voltage requirements in my application. The block diagram, does not have external switches. I am not clear whether it can  be used as boost-buck topology, by placing external components and using it as switch controller. 

Is it possible ? Or it is just used in dual battery systems as a  controller ?

Regards 

Bhargav 

  • 0
    TI__Guru 72695 points
    The LM5170 can be used as dual buck, or dual boost, in addition to the bidirectional controller between two battery sources. What is your actual power level, and input and output voltage range?
  • 0 in reply to Youhao Xi
    Intellectual 340 points

    Hello Youhao ,

    I am currently working on power supply design in automotive.

    The input voltage range will be from 6V upto 48V (Nominal).

    The output voltage range shall be from 0.5 V to 40 V.

    I (out) A shall be up to 7A. The design will be something, in the attached figure.

    The aim is to control the IC LM5170-Q1 from dSPIC Micro-controller. The output from the IC will be given to KL30 of the ECU.

    The PWM control input from the micro-controller to the LM5170-Q1 is the key, unlike TPS40170-Q1 , or LM25117 , which do not have the digital control pins.

    Regards 

    Bhargav

  • 0 in reply to Bhargav jani
    Intellectual 340 points
    Hello ,


    The LM5170-Q1, webench design model, does not have a sch export to TINA (TI) in the options .How do I use this design in TINA for simulation purpose ?

    Regards
    Bhargav