Our design has two LM5117 with same caracteristics:

Vin variable between 30Vdc and 42Vdc

Vout 12Vdc

Current Out Max 10A

 With no load we have 12V output, but under any load we do not get 

App Note "slua874" goes into calculating undershoot based on the compensation network (and even backs it up with a simulation!). Comparing the LM5117 compensation calculations to slua874 is NOT straight forward as the gain…

Hello,

I am trying to design an CV, CC regulated battery charger with adjustable current level with LM5145. I have some troubles to get stable current regulation in my circuit, the current control…

 I start a simulation with the Webench for the LM5117. When I try to export the design in ORCAD format I have failed 5 times and more. What can fix it?
I need to design DC to DC with the following…

Hi Dear,

       I need to design a power supply, specs are: -5.5V at 9A with input from 10V - 40V.

 Can I use LM5117 for this?

Also, if LM5117 can not be used, can you please suggest another one?

Hi Dear,

           I am designing a DC-DC converter using LM5117. Can you please provide the LM5117EVAL layout for reference?

Thank you

I am trying to build an adjustable power supply, controlled from a potentiometer around the FB resistors, to provide between 10V and 33V up to 8A from a 48V input.

I have started…

Hello,

I am attempting to modify LM5117EVAL board to generate 20V output with 9A current capacity.

Using the LM5117 Quick Start Calculator, I found that the only R16 (357Ohm) should be changed…

Hello TI experts,

I am trying to design an adjustable constant current supply using the LM5117 chip that can source ~0-2A. Currently, I plan to modify the CC example in the datasheet:

Originally, I tried to replace the voltage divider…

Hi,

Good day.

Our customer has generated the design using webench. You can find it here: webench.ti.com/.../SDP.cgi. Their question is why the M1 and M2 are different transistors? What is the reason? Can they use same transistors here…

Hi,

I want to use the LM5117 with an external input voltage which sets the PWM DC. I want to build up a constant current controller with external setpoint.

For this I use an INA240…

A while back there was a thread regarding a TI tinaspice model of the LM5117 that would fail convergence on SIMetrix/Simplis (diode discontinuity error).  Has that model been tweaked…

Hello,

I am attempting to design a 42V 2A CC/CV buck converter using the LM5117. I am performing CV regulation using an LMV431 and a 20V zener in series to reduce the voltage…

Hello,

This is related to a previous question where it was suggested to use a zener in series with the LMV431 to increase the clamp voltage beyond the specifications of the LMV431 to 42V to allow…

Hello,

I am trying to use the LM5117 in CC/CV mode to charge a 10 cell lithium ion battery pack. In order to do this, I intend to configure the LM5117 for a constant current of 2A with an output…

Is it possible to build a 48V to 5V/20A buck convertor using the LM5117?

Team,

we are trying to simulate the chip LM5117 in LTspice. The main functionalities are working perfectly, like adjusting the output voltage through the Rfb2 resistor.

Now I would…

Hello,

I have one technical query related to LM5117. We are using this PWM controller in one of the 28V to 13,5V/20A DC-DC converter. This is in production. At assembly plant, at EOL station…

           I used LM5117 to design two outputs, input voltage 25~40V, output1 is 12V/10A,  output2 is 22V/4A, output 1 is ok, but output2 is less than 22V without load and is ok with load. They're…

Hello,

I designed controller and cannot get it to pass EMC. I have tried adding ferrits to input and output wires, changing CBoot, and adjusting values of…

Hi there,

I am designing a circuit for one of my projects with LM5117. My intend was to create a CC regulator with hiccup mode OVP which exists in the datasheet of LM5117.  

And then i made a design with this configuration. The configuration…

    When debugging LM5117, we found that the input voltage is lower than 45V, and the output is only 15V(issue). If we increase the voltage to 50V, the output is ok (normal output voltage is…

Hello,

In a previous post I had issues with a board designed with the LM5117 to output 12/18/24V at 12A linked here.

To summarize, I had developed a board with the LM5117, however it was unable to output current even as much as 2A…

I'm designing a DC-DC Buck 8V Power Supply with the following specs:
Input: 12V - 32V
Output: 8V 17A
I've already revised the schematic using the HV Quick Start Calculator, and I found…