Part Number: LM5149-Q1EVM-400 Tool/software: To whom it may concern,
I ordered an evaluation board of LM5149-Q1EVM-400. When I powered up the evaluation board for the first time, there is no 12V output (I used the scope to measure the 12V output, and…
Part Number: LM5149-Q1EVM-400 Other Parts Discussed in Thread: LM5149-Q1 , LM5149 Tool/software: Hello,
I am trying to test LM5149 on the LM5149-Q1 EVM. Are the parts similar enough where if I replace the automotive IC with the catalog part, the EVM will…
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.
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,…
Mahankali,
LM5148 has OCP and hiccup mode for SCP protection in its current limit feature.
Just size the current sense resistor, ~4mΩ to for a 10A design.
We have thermal shutdown but only for the IC temperatures, for the FET temperatures you will…
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…
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…