Abstract
A high voltage half bridge gate driver with mismatch-insensitive dead-time generator is proposed. The high voltage high-side level shifter with common-mode noise canceller technique guarantees the stable operation in negative output voltage level. Unlike a conventional dead-time generator, the proposed dead-time generator uses one delay cell to generate dead-time and shares it with the high-side and low-side paths. The high-side gate driver allows stable negative operation up to -10.2V DC level and -40.5V peak level at 15V power supply. Measurement results of proposed dead-time generator show 1.7 times and 16.7 times improvement of dead-time mismatch when dead-time is 350nsec which is minimum set value and 5µsec, respectively, compared to the conventional dead-time generator.
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