5.2.1 GDU FEATURES
(Submit Feedback)The Gate Drive Unit connects three low-side gate drive outputs (GLx) and three high-side gate drive outputs (GHx) to three gate drive half bridges. For VGSUV monitoring, the high-side gate drivers use the signals between the VCP and VDH pins as a reference, whereas the low-side gate drivers use the VG voltage as a reference.
The GDU monitors the voltage drop between the drain and source of the MOSFET for short-circuit events.
The Slew Rate Control unit optimizes EMC performance. This feature allows the control of the gate drive current injected into external MOSFET gates at four configurable levels. The slew rate of both high-side and low-side gate controls are configurable individually to achieve the best trade-off between EMC performance and drive efficiency.
The module combines the following sub-modules:
- High-side gate drive unit, including control logic, an adaptive dead-time unit, slew rate control unit, level shifter and gate driver
- Low-side gate drive unit, including control logic, an adaptive dead-time unit, slew rate control unit, level shifter and gate driver
- VDS monitoring unit
- Temperature monitoring sensors