Issue link: https://resources.pcb.cadence.com/i/1480208
Contents Tools Used .................................................................................................................................................... 2 Specification .................................................................................................................................................. 2 System Block Diagram .................................................................................................................................. 3 Full Bridge Rectifier .............................................................................................................................. 3 Single Forward Convertor .................................................................................................................... 4 PWM Controller .................................................................................................................................... 4 Limitation ....................................................................................................................................................... 5 Simulation of VRM Module............................................................................................................................ 5 Simulation with Ideal Components ....................................................................................................... 5 Simulation with a Real Devices ............................................................................................................ 6 Output Voltage Ripple .......................................................................................................................... 7 Device Currents .................................................................................................................................... 8 Line Regulation ..................................................................................................................................... 9 Switching Losses in MOSFETs .......................................................................................................... 13 Calculation of Efficiency ..................................................................................................................... 15 Step Load Change Response ............................................................................................................ 16 Line Harmonics ................................................................................................................................... 18 Other commonly used VRM specification ................................................................................................... 19 PCB layout .................................................................................................................................................. 19 Trace Width Calculation ..................................................................................................................... 20 Trace Clearance Calculation .............................................................................................................. 20 Driving Other PCB Layout Parameters from Simulation .................................................................... 20 Conclusion................................................................................................................................................... 21