MLX83202 Datasheet, PDF (27/35 Pages) Melexis Microelectronic Systems – Automotive NFET pre-drivers

MLX83202/MLX83203
Automotive NFET pre-drivers
8.7 FET driver implementation
8.7.1 Normal operation
The top side FET drivers are bootstrapped drivers. Each of the 6 external FET transistors can be controlled
directly via the 6 digital inputs. The 6 external FET transistors (or 3 half bridges) can also be controlled with
only 3 digital input signals. This can be done by connecting the FETTi to VDD and control the 3 phases via
the FETBi inputs. In this mode the MLX83203 will automatically generate the programmed dead times. Figure
12 shows the internal implementation of the driver stage from input to output.
The drain source voltage VDS as well as the gate voltage VGS are monitored to ensure fail safe operation.
The FET gate outputs are all pulled low by pulling EN low.
Figure 12. Internal implementation of the driver stage
3901083203
Rev 2.2
Page 27 of 35
Prelim. Data Sheet
4 Dec 2013