• LT8709 Design

    Hi,

    I need to use the LT8709 to convert a negative input (-15V) to a positive output (at least +10V) with a current output close to 1A. The design guide give the advice to use the SUD50P06 and FDMS86500L. My problem is that I need to change both (they…

  • Evaluation Board for LT8709

    1.We are trying to design a power supply circuit for telecom application with an input voltage of -48V to -60V and requires output power of +12V/2A.

    2.Can you suggest if we can use LT8709 part in our design and also share us if any evaluation board details…

  • Evaluation board for LT8709

    Hi,

    1.We are trying to design a power supply circuit for telecom application with an input voltage of -48V to -60V and requires output power of +12V/2A.
    2.Can you suggest if we can use LT8709 part in our design and also share us if any evaluation board…
  • Inductor calculation for LT8709

    Hi

    I'm a DFAE in Japan.

    I design LT8709 Negative Inverting Converter for my customer following Table 2 in datasheet. I'd like to know how the three voltage values as 12.5mV, 40mV and 3mV in Step 6 L calculation are derived.

    I make the calculation…

  • Is AN19fc available for LT8709 ?

    Hi

    I consider using LT8709 for negative inverting converter as -48V to +12V, 3A. But I don't understand the equations in table 2 on LT8709 data sheet. Because I don't understand what the parameters mean as follows. There are 0.58, 0.05 and 1.6 in…

  • Negative input and positive output bu using LT8709

    Hi,

    I am using LT8709 as a negative to positive converter input is -48V and output is +24V/15A, when i design and simulate it the out is not stable its varying from 23.8V to 25.5V with constant current of 14A, could anyone help me to fix this issue?

  • RE: Definition of Vcspn

    I was informed that you are referring to LT8709. Can you clarify your question since use of these pins are explained in page 23 of datasheet. For duty of 20%, voltage across these pins VCSPN can only go ~50mV.

  • RE: LT836x for Negative Input

    Hi Hiroyuki-san,

    LT8709 is the only part that I have searched so far. With 3A output current, you will certainly going to need controller instead of monolithic. Please communicate your requirement to a local ADI FAE for further advice. 

  • RE: Generating negative VOUT from negative VIN

    Hi,

    Please check LT8709. An LTspice model is available to help your design. Example application can be found in Fig. 22 page 40 of the datasheet.

  • RE: How to use LTM8045 for getting +1.8V from -5V

    The LTM8045 can generate 1.8V on top of a 5V rail, but the LTM8045 does not have 4A output capability.

    For the customer's application, I recommend the LT8709 in the Negative Inverting Converter configuration shown in the image below.  The circuit…