Part Number: LM5149-Q1EVM-400 Hi Texas Instruments team,
We are currently customizing the evaluation board (LM5149-Q1EVM-400) for 12V and 20A output configuration. Basically, we are de-populating some components and populating other components which sets…
Part Number: LM5149-Q1EVM-400 Other Parts Discussed in Thread: LM5149 What is limiting the input voltage on this eval board to 72V (part is rated to 80V)? Noticed that C26 (on VIN) is only rated to 50V which is a problem even for 72V operation.
Part Number: LM5148 Other Parts Discussed in Thread: LM25149-Q1EVM-2100 , LM5149-Q1 , LM5149-Q1EVM-400 Hello,
I am currently in the process of constructing a buck converter with the following specifications:
Input Voltage: 15-80V
Output Voltage: 12.51V …
Hi Sanjana,
Just looking at the quickstart, the high-side FET power loss is 2W at full load of 10A. Make sure there are no gate resistors reducing the switching speed here, as that will exacerbate the thermal situation.
Also, the quickstart mentions…
Part Number: LM5148-Q1 Other Parts Discussed in Thread: LM5148 , LM5149-Q1EVM-400 Hi Team,
This is regarding the buck converter Protection Circuit Design.
Input Voltage: 40V-60V
Output Voltage: 13.8V
Output Current: 10A (max)
Switching Frequency: 460-5…
Mingkang,
We cannot give exact load/line regulation for the system.
On your board you can have variances due to layout or noise.
In ideal cases the load regulation should be close to 0.1% and the line regulation should 1%
You can see this in our EVM,…
Sagar,
LM25149 is a suitable controller yes.
At load current larger than 10A, the temperatures of MOSFETs and inductor usually get extremely hot, due to I^2 * R losses growing exponentially.
Those temperatures are usually the limiting factor
You can reference…
Part Number: LM5148 Other Parts Discussed in Thread: LM5149-Q1EVM-400
Design for automotive use using LM5148. Required Output of 12V with a max current of 20 Amps, operating at a nominal voltage of 15 Amps
Can we use a ceramic cap in parallel to reduce…
Mark,
It's fairly reasonable, even 2.2W could be a bit much, when comparing to the results from the default quickstart calculator.
By the way, the LM5149 quickstart calculator is meant to model the LM25149-Q1EVM-2100, and that EVM user guide has a…