Hello,
I have a design need to design a DC/DC converter, the input voltage is 5V and the outputs are -3.6V and -12V 1A. I was using WEBENCH® POWER DESIGNER to search and found LM5088/LM25088 can meet my requests? However, WEBENCH® POWER DESIGNER didn't provide the simulation. I download the models and put it in TINA to do the simulation but I couldn't get the correct. Any suggestion? Thanks.
Hello Kevin
I think the TINA model doesn't support suppling the negative voltage at the GND pin. Please modify the circuit like this and try to simulate it again.
-EL
I modified to this but still not right. Do you think the problem came from TINA? If so, I can just skip the simulation and make a board to verify it. Thanks.
Hello Kevin
It works after #1 connecting 5V inut supply to the VOUT node, #2 using resistor load and #3 connecting the output capacitor to ground.
-EL
Hello Kevin
Voltage is the electric potential difference between two nodes. If you set 'A' node as a reference of your local system, then 'B' node becomes negative voltage. If you set 'B' node as a reference of your system, then 'A' node becomes positive voltage.
-EL
Hello Kevin
WEBENCH is a good tool. Please follow the component selections and the recommendations from the WEBENCH. Also, you can download Power Designer and tune your design.
-EL
Hello Kevin
It was caused by an initial condition issue. Please match the initial conditions of input capacitors same as the input voltage.
-EL
