Infineon Technologies Ag

Dario Cappuzzo

Michele Bergo

Cristian Garbossa

Luca Scandola

Silvia Solda

Ozan Serpedin

Vlad Alexandru Mircea Ionescu

Alberto Arpino

Paola Lops

Bogdan Dimitriu

This disclosure describes a filter circuit for a power converter circuit. The filter circuit may comprise a comparator circuit configured to determine when a switch node voltage of the power converter circuit satisfies a voltage threshold, and a deglitch circuit configured to determine whether the switch node voltage satisfying the threshold is expected based on control signals to the power converter circuit or attributable to a situation of ringing on an inductor of the power converter circuit. The filter circuit may be configured to output a fault in response to both the comparator circuit determining that the switch node voltage of the power converter circuit satisfies the voltage threshold and the deglitch circuit determining that the switch node voltage satisfying the threshold is not expected based on the control signals and not attributable to the situation of ringing on the inductor of the power converter circuit.

Power converter circuit with smart filter for identifying faults

In some examples, a device includes a selector circuit configured to deliver power to a first driver circuit, where the first driver circuit is configured to activate and deactivate a first switch of a postregulator. The device also includes a startup regulator and a controller configured to cause the selector circuit to deliver power from the startup regulator to the first driver circuit. The controller is also configured to determine that a boost regulator is operational after delivering power from the startup regulator to the first driver circuit. The controller is further configured to cause the selector circuit to deliver power from the boost regulator to the first driver circuit in response to determining that the boost regulator is operational.

Power delivery to a driver circuit in a postregulator

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Limena, Italy

Dario Cappuzzo