McClure, Qualey & Rodack, LLP
Active clamp flyback converter capable of switching operation modes
A power converter using an active-clamp flyback topology has a low-side switch, a high-side switch and a control circuit. The low-side switch connects a primary winding of a transformer to an input ground line, and the high-side switch is connected in series with a capacitor to form an active-clamp circuit connected in parallel with the primary winding. The control circuit provides high-side and low-side signals to the high-side and the low-side switches respectively, in response to a current-sense signal and a compensation signal. The control circuit is configured to operate the power converter in one of operation modes including a complementary mode and a non-complementary mode. When operated in the complementary mode, the high-side signal and the low-side signal are substantially complementary to each other, and the control circuit exits the complementary mode in response to the current-sense signal to enter the non-complementary mode.
LEADTREND TECHNOLOGY CORPORATION
H H Y H H H H
H02M H02M Y02B H02M H02M H02M H02M
inventional inventional additional additional inventional inventional additional
Meng Jen Yao Tsung Chih Chi
Tsai Chen Chang