Other Parts Discussed in Thread: CSD18534Q5A
ALL HI!
Currently, LM5176 is used to build a BUCK-BOOST circuit, input 8V~36V output 12V/3A. The first version of the PCB debugging function is normal, input 24V input current 20mA when the output is no-load. The second version of the PCB uses exactly the same components as the first version, but the size of the PCB has been modified, and the layout is different from the first version. When the output is no-load, the input voltage is 24V and the input current is 40mA .The no-load current becomes larger. Similar problems occurred in the first version of the PCB, but the switching frequency was changed from 200KHZ to 400KHZ, and the output switching ripple was reduced and improved. But the second version of the PCB switching frequency is already 400KHZ. The output ripple is obviously reduced by increasing the output capacitance, but the no-load current is not reduced. At present, there is no good way to optimize as desired. Can the no-load current be optimized by modifying the parameters of COMP (see the figure below)? Or there are other ways to optimize this no-load current. thank you very much.