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AssigneeLeadtrend Technology Corp.
InventorsYao Tsung CHEN, Chih Chi CHANG, Meng Jen TSAI
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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.
A power converter using an active-clamp flyback topology, comprising:
A control method for use in a power converter using an active-clamp flyback topology, wherein the power converter comprises an active-clamp circuit with a high-side switch and a capacitor, a primary winding connected in parallel with the active-clamp circuit, a low-side switch connecting the primary winding to an input ground, the control method comprising:
Dependencies are inferred from the claim text.