Good morning,
i have tried to do a simulation with webench of the power supply LM624606-Q1, with these parameters:
Webench doesn't allow me to do this simulation, it tells me "Design cannot be created!"
The simulation work fine only if I set: vout 12V, iout 1A.
Why I have problems with 6A? The device can work at 6A..
Can you suggest me something?
Thanks in advance,
Diego.
Hi Diego,
Based on simulation, it looks like the reason you are not able to simulate your application condition is because at 28Vin|12Vout|6A|2.2MHz the device will have a IC junction temperature that exceeds 150degC.
You can simulate with input voltage range of 16V - 23V and notice that for 23Vin|12Vout|6A|2.2MHz, the simulated IC Tj is 145.74degC
In order to improve efficiency and thermal performance, I would suggest dropping the switching frequency lower to reduce IC switching losses.
Regards,
Jimmy
