Dead-Time Control is a timing mechanism in gate driver ICs that prevents simultaneous conduction in power switches.
Dead-Time Control is a critical protection feature in gate driver integrated circuits that introduces a deliberate delay between the turn-off of one power semiconductor switch (like a MOSFET or IGBT) and the turn-on of its complementary switch in half-bridge or full-bridge configurations. This delay prevents shoot-through currents that occur when both switches conduct simultaneously, which can cause catastrophic failure due to excessive current and heat generation.
诱因 → 失效模式 → 工程缓解
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Dead-time control prevents simultaneous conduction of complementary power switches, which would create a short circuit (shoot-through) across the power supply, leading to excessive current, overheating, and potential device destruction.
Dead time can be fixed by internal design, set by an external resistor, or programmed digitally through serial interfaces like SPI or I2C in advanced gate driver ICs.
Too short dead time risks shoot-through currents; too long dead time reduces effective duty cycle, increases distortion, and lowers system efficiency due to longer non-conduction periods.
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