controller or others equipment and the high peak voltage may be to damage the MOSFET (M2). For different position of stray inductance, a high frequency capacitor (Cd) and RC Snubber circuit must be placed across the drain of M1 to ground and lower switch (M2) of the synchronous rectifier ...
This problem can be solved by adding a small snubber across the line. SELF-CAPACITANCE A thyristor has self-capacitance which limits dV dt when the load inductance is large. Large load inductances, high power factors, and low voltages may allow snubberless operation. SNUBBER EXAMPLES WITHOUT ...
PROBLEM TO BE SOLVED: To reduce a power loss to improve efficiency by connection in parallel a schottky diode with the synchronous rectifier transistors in the rectifier side and flywheel side and then connecting a resistor to the gate of the transistor in the rectifier side. ;SOLUTION: The sch...
Body diode current Cd Ls1 1 2 Vg2 Vd M2 Cin D2 Vphase D1 Vg1 0 CL M1 Cs L1 1 2 Ls2 1 2 RL Rs Figure 3. Synchronous Rectifier Buck converter with high frequency input capacitor and R-C snubber circuit 3 Case 1: First, assume the stray inductance 0 2 » s L , at the ...