cupoftea
Advanced Member level 5
Hi
Attached is the Eagle 7.4.0 schem & layout for a 150W isolated LLC converter. Vin = 390vdc, vout = 180v.
F(sw) = 100kHz at resonance.
(There is free viewer for Eagle 7.4.0 on web……
As you can see, the primary side control ground only meets the primary side power ground at one place, near D35, .....where there is no choice, it must meet there as the gate drive connects there.
Though Our contractor wants to just have a huge single ground plane instead…but do you agree, this would make a worse noise situation?
Attached is the Eagle 7.4.0 schem & layout for a 150W isolated LLC converter. Vin = 390vdc, vout = 180v.
F(sw) = 100kHz at resonance.
(There is free viewer for Eagle 7.4.0 on web……
As you can see, the primary side control ground only meets the primary side power ground at one place, near D35, .....where there is no choice, it must meet there as the gate drive connects there.
Though Our contractor wants to just have a huge single ground plane instead…but do you agree, this would make a worse noise situation?