How is gate driver power consumption calculated?

The average power consumption of the gate drive circuit PG can also be expressed as PG =E×fsw =Ciss×(VG)2×fsw in terms of the input capacitance.

What is the peak gate current?

Peak current is one of the most important parameters in gate driver data sheets. This metric is generally taken as the be-all and end-all for the drive strength of the gate driver. The time to turn a MOSFET/IGBT on and off relates to the current that the gate driver can deliver, but it doesn’t tell the whole story.

What is gate drive voltage?

For typical gate voltages of approximately 10-15V, several watts of power may be required to drive the switch.

How is gate current calculated in IGBT?

The gate current calculated is the minimum average output current of the driver output stage per channel: IG = IGE + IGC = QG x fSW. The IGBT switching time is controlled by charging and discharging the gate of the IGBT.

What is gate current in SCR?

This extra terminal is called the gate, and it is used to trigger the device into conduction (latch it) by the application of a small voltage. To trigger, or fire, an SCR, voltage must be applied between the gate and cathode, positive to the gate and negative to the cathode.

What is the average power consumption of the gate driver?

The average gate drive power, PDRIVE, is QGVGf. Taking the above 100 kHz switcher as an example, and assuming a gate drive voltage VG of 14 volts, the appropriate value of gate charge QG is 27 nanocoulombs (point C on Figure 3). The average drive power is therefore 27 X 10-9 X 14 X 105 = 0.038 Watts.

What is the average power consumption of the gate driver in Watts?

What are gate drive circuits?

Gate driver circuit is circuit integral part of power electronics converters which is used to drive power semiconductor devices like BJT’s , IGBT’s and MOSFETs. Output of DC DC converters mainly depend on behavior of gate driver circuits. These devices include both high side or low side MOSFET driver functionalities.