Diferencia entre una puerta del MOSFET y de IGBT GATE

Asumiendo el punto de interés es la potencia MOSFETS  y no  las pequeñas señales  MOSFET y silicio (lo contrario  a SIC, GAN).

 

Hay que estar atentos  que algunos  IGBT drivers  también tienen la opción de desactivar la tensión (para que los cambios sean más rápidos).

 

La primera característica que tenemos que chequear es la tensión de salida. Para los dispositivos de potencia deben de ser 0V a 12-15V (acpl-312T)  para atender a los umbrales de puerta alrededor 4V (Además de ser capaz de conducir a 15V Si activación de miller es una preocupación).

Tal como un Driver MOSFET conduciendo un IGBT e igualmente un driver IGBT conducir un MOSFET debe de estar bien.

 

La siguiente característica debe tener una corriente máxima. IGBT tendrá significantemente  una mayor capacidad  de puerta y como tal requiere mayores corrientes de pico para asegurar que el dispositivo se satura tan rápido como sea posible. Lo contrario a esto sería que los  MOSFETS se puedan cambiar más rápido y como tal la actual demanda de rms de conducir  un MOSFET podría ser más alta.

 

La corriente más alta  o cambios más altos de frecuencia afecta la potencia de la capacidad de los Drivers.

Difference Between a MOSFET Gate and IGBT Gate

Assuming the point of interest is power MOSFETS and not small signal MOSFETS and silicon (as oppose to SiC, GaN).

 

Be aware that some IGBT drivers also include a negative turn-off voltage (for faster switching).

 

The first characteristic to check is the output voltage. For power devices they should be 0V to 12-15V (acpl-312T) to cater for gate thresholds around 4V (as well as being able to drive to -15V if miller turn-on is a concern). As such a MOSFET driver driving an IGBT & equally an IGBT driver driving a MOSFET should be fine.

 

The next characteristic is peak current. IGBT’s will have significantly larger gate capacitance and as such will require higher peak currents to ensure the device saturates as quick as possible. The converse of this is MOSFET’s can be switched faster and as such the rms current demand to drive a MOSFET might be higher.

 

Higher current or higher switching frequency affects the driver power capability.

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Related Topics:

 

High Power Transistor, IGBT Working Principle, IGBT Structure, Testing IGBT, IGBT Device, IGBT Gate, IGBT High Voltage, Insulated Gate Bipolar Transistor Basics, IGBT Converters, Eupec Infineon FZ800R12KF4