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US 9,401,710 B2Granted
Active diode having improved transistor turn-off control method
AssigneeMaps, Inc.
InventorsJong-Tae Hwang, Hyun-Ick Shin, Sang-O Jeon, Joon Rhee
Life of this patent
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Abstract
An active diode that features improved control of transistor turn-off is provided. Such an active diode may include a comparator to compare voltages between opposite ends of a parasitic diode, and a gate driver to control a gate terminal of the transistor according to the comparison result of the comparator. Furthermore, the active diode may further include an off-timing controller to control the transistor to be turned off at a point in time when voltages of the opposite ends of the parasitic diode turn positive. Thus, the active diode may be turned off when required.
Claims6
An active diode, comprising:
- a comparator configured to compare voltages at opposite ends of a parasitic diode of a transistor;
- and a gate driver configured to, in response to the comparison result of the comparator, control a gate terminal of the transistor, wherein the active diode further comprises:
- an off-timing controller configured to turn off the transistor at a point in time when the voltages at the opposite ends of the parasitic diode is positive;
- wherein the off-timing controller is configured to adjust when the transistor is to be turned off based on an output signal from the comparator and a gate operation signal of the gate driver.
1 more element
Dependencies are inferred from the claim text.