Patent ID: 7106035
Filing Date: 2006-09-12
Classification: H02M,Y02B

Abstract:
1. An arrangement for generating an output voltage as a function of inductor current in a pulse width modulation-based DC—DC voltage converter, having an upper controlled switch and a lower controlled switch coupled in series between an input voltage terminal and a reference voltage terminal, a common connection of said upper controlled switch and said lower controlled switch providing a phase node voltage, an inductor coupled between said phase node and an output node arranged to be coupled to a load, comprising: a controller which is operative to monitor said phase node voltage and an output voltage at said output node, and is operative to generate a sense current as a function of the difference between said phase node voltage and said output voltage; and a resistor-capacitor network comprised of a resistor Rs and a capacitor Cs coupled to receive said sense current and referenced to a constant voltage and producing a voltage thereacross that is proportional to said inductor current.