Using the current as a reference:
In practice, using a gate drive with a voltage reference has several advantages over a
current source driveand is thereforedescribed inmoredetail in the following.
6.3.1 Voltage sourcedrivers
Almost exclusively used today are IGBT gate drives based on a voltage source. They
have the advantage over current source gate drives, that the power losses are
dissipated in the gate resistors and not in the current source within the driver stage.
Through the gate resistor it is also possible to adjust the maximum gate current. The
derivation of the calculation of the gate current is explained in section
advantages are the relatively simple electronic circuits and controls. As of today the
market is dominated by almost equal, but in realisation different, voltage source drivers
like BJT emitter followers and MOSFET drivers. More recent generations as, for
instance, the n-channel push-pull gate driver have been implemented with increased
circuit integration inmixed signal ASI
Basic circuit of a voltage source drive
shows the basic circuit of an IGBTwith a voltage source drive. As explained in
the following sections of this chapter, the parasitics such as the gate inductance L
not negligible and have tobe taken into account.
184.108.40.206 H-bridge circuit
TheH-bridge circuit allows a simple reversal of the potential at the IGBT gate. Here, the
control signal is converted into an inverted and a non-inverted signal. The non-inverted
Mixed-signal ASIC (Application Specific IntegratedCircuit) are integrated circuits that consist of both digital and
analogue circuit components. An example of a mixed-signal ASIC with n-channel push-pull gate drive is the
SCALE-2 IGD chip fromCONCEPT.