This
design is based on Active Resonant Tank (ART) cells to achieve
Zero-Voltage-Switching (ZVS) and eliminate body diode conduction in
dc-dc converters with Synchronous Rectifiers (SRs). In
low-output-voltage dc-dc converters, SRs are widely utilized to reduce
rectifier conduction loss and improve converter efficiency. However,
during switches’ transition, SRs’ parasitic body diodes unavoidably
carry load current, which decreases conversion efficiency because the
voltage drop across body diodes is much higher than that across SRs.
Moreover, body diodes’ reverse recovery leads to increased switching
losses and electromagnetic interference. With ART,
the body diode conduction of the SR is eliminated during the switching
transition from an SR to an active switch, and thus body diode
reverse-recovery- related switching and ringing losses are saved. An ART
cell consists of an LC resonant tank and an auxiliary switch. A
resonant tank cell is charged in a resonant manner and energy is stored
in the capacitor of the tank. Prior to a switching transition from an SR
to an active switch, the energy stored in the tank capacitor is
released and converted to inductor current, which forces the SR current
changes direction to avoid conduction of the body diode and related
reverse recovery when the SR turns off. Moreover, at the help of energy
released from the ART, the active switch’s junction capacitance is
discharged, which allows the active switch turns on at ZVS. Since energy
commutation occurs only during switching transition, conduction loss in
the ART cell is limited. Moreover, the auxiliary switch turns off at
ZVS and the SR operates at ZVS. The concept of ART cells is design using
Matlab-Simulink and simulation analysis is presented based on a
synchronous buck converter. Reference Paper: Zero-Voltage-Switching DC–DC Converters with Synchronous Rectifiers Author’s Name: Hong Mao, Osama Abdel Rahman, and Issa Batarseh Source: IEEE TRANSACTIONS ON POWER ELECTRONICS Year: 2008
Request source code for academic purpose, fill REQUEST FORM or contact +91 7904568456 by WhatsApp or sales@verilogcourseteam.com, fee applicable.
SIMULATION VIDEO DEMO

PREVIOUS PAGE|NEXT PAGE |
|