ADAPTIVE CABLE DROP COMPENSATION

摘要

A power supply control system delivers regulated power to a load via a delivery cable. The power supply control system includes a power stage operable to deliver power to the load at a first regulated voltage level and a second regulated voltage level. A cable offset voltage unit generates an offset voltage signal representing a drop in voltage across the delivery cable. The offset voltage signal is generated based on a first cable drop compensation value when the power stage is operated to deliver power at the first regulated voltage level and based on a second cable drop compensation value when the power stage is operated to deliver power at the second regulated voltage level. A controller coupled to the power stage and the cable offset voltage unit controls the power stage to deliver the regulated power to the load based at least in part on the offset voltage signal.

主权项

1. A power supply control system delivering regulated power to a load via a delivery cable, the power supply control system comprising:
a power stage delivering the regulated power to the load, the power stage operable to deliver power to the load at a first regulated voltage level and a second regulated voltage level, wherein the load is rated for a first maximum current at the first regulated voltage level and a second maximum current at the second regulated voltage level; a cable offset voltage unit generating an offset voltage signal representing a drop in voltage across the delivery cable, the cable offset voltage unit configured to:
generate the offset voltage signal based on a cable offset factor when the power stage is operated to deliver power at the first regulated voltage level, andgenerate the offset voltage signal based on scaling the cable offset factor by at least one of a ratio of the second regulated voltage level to the first regulated voltage level and a ratio of the second maximum current to the first maximum current when the power stage is operated to deliver power at the second regulated voltage level; and a controller coupled to the power stage and the cable offset voltage unit, the controller controlling the power stage to deliver the regulated power to the load in response to a feedback signal representing a voltage across the load adjusted based on the offset voltage signal.