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Non-Isolated DC/DC

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High Current
Related Posts

  • Forum Post: Re: Help with a DC-DC stepup power supply or other solutions

    Peter Miller13277
    I designed and built this circuit and did not work at more than 500mA(voltage drop 5-6V) with an inductor(4,7uH at 10A), diode DPG60IM400QB(400V, 60A) and 450kHz switching frequency. At higher currents(>500mA) the mosfet(no heatsink) is smoking in aprox 1 second. I checked the datasheet for...
    on Dec 9, 2010

  • Forum Post: Re: TPS40061 above 10A (input 20V-50V, output 5V)

    Peter Miller13277
    Sal, Why the web site put 10A for the part and no mention in the datasheet. The Website offers recommended applications where the IC can be used, but it has some limitations. To help our customers, TI recommends a range where we believe the device will provide good performance with a reasonable...
    on Dec 16, 2010

  • Forum Post: Re: Buck / Boost Converter Design for very high currents

    Peter Miller13277
    Tom, There are a couple of possible issues with this: 1) A 30V MOSFET is likely not the best choice for a 24V input. Ringing on the switching node will likely result in more than 30V applied to the Drain-Source voltage of the low-side FET. I would encourage you to consider a 40V MOSFET for a...
    on Jan 17, 2011

  • Forum Post: Buck / Boost Converter Design for very high currents

    Tom64540
    Dear Sirs / Madams, We'd like to find out whether TI offers an integrated circuit that allows us to build a DC/DC converter for both directions (buck direction from 9-18V --> 24V, and Boost from 18-24V ----> 9-18V). It's an application where both sides of the converter will be battery...
    on Jan 12, 2011

  • Forum Post: Low duty cycle - high pulse current application

    Darren Carpenter
    I am designing a device that I would like to operate off a USB port as one of the options. That gives me 2.5 watts of power (5 volts @ 500mA) My application has a low impedance device (2.5 ohms or there about) and requires 9 to 12 Volts of supply. This is very high current for a short time (5% duty cycle...
    on Feb 14, 2011

  • Forum Post: Re: TPS54620 not stable with different load conditions.

    Nick McMilan
    Hi John, The requirements of my design does not allow me to change components. Can you please recommend one set of compensation values for my 6 conditions? Vout 2V and 5V, at Iout of 0A, 2A and 6A. When using Switcher Pro, it recommends 6 different set of compensation. When I try 2v or 5V...
    on Jun 10, 2011

  • Forum Post: Controller/Converter needed for High Current Application

    Scott Gauche
    Hello, Has anyone designed a high current application around the LM5118? Specs for my design are 6-32V input, 28V output, 15A max continous current, 50A 1 second peak load. Is it possible to meet these specs using this controller? Is there a better solution from TI/National for this type of application...
    on Nov 30, 2011

  • Forum Post: LM5118 output drops out for high current and low input voltage

    1841064
    Hello, I’m having some challenges with an LM5118 circuit with the following application requirements: Vout = 12V Vin(min) = 8V Vin(max) = 37V Iout(max) = 8.33A I am finding that for high loads and low input voltages, the output voltage drops out. Here are the specifics: At 2.0A load, 12V Vout is...
    on Mar 21, 2012

  • Forum Post: LM3488 possible latch-up mode

    Stephen Soos
    I have the LM3488 designed in many of our standard products configured as a simple boost converter. One in particular, is our series of lower power (<10watts) LED drivers. I have the LED return current flowing thru a sense resistor that develops the feedback voltage on pin 3. I like this current-mode...
    on Apr 3, 2012

  • Forum Post: Parallel operation of TPS40054

    Matthias Stockhaus
    In my actual design I use a TPS40055 (24V input, 3.1V output 15A). But I need more output current and I read in the datasheet that the TPS40054 allows paralleling of converters. From the datasheet: "The TPS40054 operates in one quadrant and sources output current only, allowing for paralleling...
    on Mar 5, 2012

  • Forum Post: LM3488 very low Vsupply

    Jeppe Odgaard
    Hi! I'm developing a boost converter that uses a 3,9V supply and boost a 0,5V input to a 3,9V output. The current is also quite high (some amps), so there is some loss in the external components. Therefore I've chosen the LM3488 since it can provide a 100% duty cycle. I want a high duty cycle...
    on Oct 24, 2012

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