Configurable voltage drop compensation method and apparatus for voltage regulators
AssigneeDell Products L.P.
InventorsHang Li, Shiguo Luo, Mehran Mirjafari
Life of this patent
Estimating the term…
Abstract
An information handling system includes a voltage regulator control circuit having a programming resistor input pin for receiving an input from a programming resistor and an ammeter input for receiving a current value. A power source provides power to a load circuit coupled to the power source via a non-remote-sensing power connection. In accordance with at least one embodiment, the voltage regulator control circuit assures a reliable input to an overvoltage protection circuit of the voltage regulator control circuit regardless of states of connections of the load circuit to the power source.
Claims20
An information handling system including:
- a power source comprising a voltage regulator control circuit having a programming resistor input pin for receiving an input from a programming resistor, an ammeter input for receiving a current value, and a local positive voltage sensing lead input for locally sensing a power source output voltage of the power source, the local positive voltage sensing lead input connected to a first voltage divider resistor, the first voltage divider resistor connected to a feedback voltage node, the feedback voltage node connected to a second voltage divider resistor, wherein the programming resistor input pin is not connected to the feedback voltage node;
- and
- a load circuit coupled to the power source for receiving power from the power source.
An apparatus comprising:
- a voltage regulator control circuit, the voltage regulator control circuit including a programming resistor input pin for receiving an input from a programming resistor, the voltage regulator control circuit further including an ammeter input for receiving a current value, the voltage regulator circuit further including a local positive voltage sensing lead input for locally sensing a power source output voltage, the local positive voltage sensing lead input connected to a first voltage divider resistor, the first voltage divider resistor connected to a feedback voltage node, the feedback voltage node connected to a second voltage divider resistor, wherein the programming resistor input pin is not connected to the feedback voltage node.
A method comprising:
- receiving a programming resistor input value from a programming resistor input pin coupled to a programming resistor;
- receiving a current value at an ammeter input;
- providing a voltage drop compensation value based on the programming resistor input value and based on the current value;
- controlling an output voltage of a power source based on the voltage drop compensation value;
- and
- locally sensing a power source output voltage of the power source at a local positive voltage sensing lead input, the local positive voltage sensing lead input connected to a first voltage divider resistor, the first voltage divider resistor connected to a feedback voltage node, the feedback voltage node connected to a second voltage divider resistor, wherein the programming resistor input pin is not connected to the feedback voltage node.
Dependencies are inferred from the claim text.