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In a digitally controlled slope shaping system, reliable detection of both voltage and current slope is required to enable a closed-loop control for various power switches independent of system parameters. In most state-of-the-art works, this is realized by monitoring the absolute voltage and current values. Better accuracy at lower DC power loss is achieved by sensing techniques for a reliable passive...
Modern power transistors are able to switch at very high transition speed, which can cause EMC violations and overshoot. This is addressed by a gate driver with variable gate current, which is able to control the transition speed. The key idea is that the gate driver can influence the di/dt and dv/dt transition separately and optimize whichever transition promises the highest improvement while keeping...
In various fields, there is a growing need for electric motor drives and inductive power converters. To achieve better switching behavior and lower EME in inductive switching applications, very precise gate control of the power MOSFETs by the gate driver is required. The driver presented in this paper can operate at voltages up to 60V, and it is able to change the gate current in 10 / 15ns (rise /...
There is a growing need for motor drives with improved EMC in various automotive and industrial applications. An often referenced approach to reduce EME is to change the shape of the switching signal to reduce the EMI caused by the voltage and current transitions. This requires very precise gate control of the power MOSFET to achieve better switching behaviour and lower EME without a major increase...
The prevention of electromagnetic emissions (EME) in bridge applications is of major importance, especially in automotive applications. Current source gate drivers are a popular approach to improve the performance in electromagnetic compatibility (EMC). Despites, their EMC performance has rarely been investigated in detail. Starting with the differences in the gate drive transients versus a conventional...
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