Low side gate drivers │ EiceDRIVER™ 1EDN TDI
Low side gate drivers with Truly Differential Inputs: EiceDRIVER™ 1EDN TDI
The input signal levels of conventional low-side gate driver ICs are referenced to the ground potential of the gate driver IC. If in the application the ground potential of the gate driver IC shifts excessively, false triggering of the gate driver IC can occur. Overcome ground-shift challenges in your design with Infineon’s single-channel low-side EiceDRIVER™ gate driver ICs, which have truly differential inputs
Gate-driver ground-shifts can have two main causes:
The parasitic ground inductance between where the gate-driver IC is placed and where the control-IC resides can be one reason. Applications where the distance between these two ICs is relatively long are prone to that. The need to use single- or dual-layer PCB material, as opposed to multi-layer PCBs, may be one root cause. Industrial design requirements or having the control IC on a daughter card can be another.
A second reason for the gate-driver ground-shift can be parasitic source inductances between the gate-driver IC and the MOSFET driven by it. That’s particularly of relevance in hard-switching applications like PFCs and synchronous rectification stages.
The 1EDN7550 and 1EDN8550 gate driver ICs have truly differential inputs. Their control signal inputs are largely independent from the ground potential. Only the voltage difference between its two input contacts determines its output being “on” or being “off”. This prevents false triggering of power MOSFETs in a very elegant and robust way, and thus eliminates electrical overstress (EOS) of the power MOSFETs. Both products are available in a small 6-pin SOT package.