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Protección contra Disparo Cruzado

Referencia técnica sobre Protección contra Disparo Cruzado para el diseño, integración e implementación de sistemas de energía inalámbrica.

6 minArtículo 34/50Electrónica de Potencia

Shoot-Through Protection — educational diagram — Fig.: Diagrama educativo de “Shoot-Through Protection”.

Shoot-through is a direct short across the DC bus through two switches in the same leg. Energy release is fast — enough to fuse bond wires or trip breakers. Wireless charging docks need layered protection because firmware bugs, noise, or brownout recovery can corrupt PWM commands.

Protection combines dead time, driver interlocks, hardware desat detection, and supply monitoring.

01Hardware layers

Gate driver interlock preventing overlapping outputs.
Desaturation detection turning off switch on abnormal VDS.
Fast fuse or breaker coordination — know let-through energy.

Shoot-Through Protection — supporting diagram — Fig.: Ilustración de apoyo para “Shoot-Through Protection”.

02Firmware layers

Complementary PWM with enforced blanking interval. Safe state on fault — all gates off. Watchdog and clock failure must default to off, not last PWM pattern.

03Commissioning

Intentionally marginal dead time on engineering unit to verify detection — not in field.
Never bypass interlocks for “more power” experiments.
Log shoot-through fault codes to fleet management for recurring dock IDs.