CURRENT SENSE ACCURACY IMPROVEMENT FOR MOSFET RDS (ON) SENSE BASED VOLTAGE REGULATOR BY ADAPTIVE TEMPERATURE COMPENSATION
First Claim
1. An Information Handling System (IHS) having temperature-compensated power control, the IHS comprising:
- a computing component;
a voltage regulation (VR) module comprising;
an integrated circuit die;
a power stage component contained in the integrated circuit die and comprising a high side driver and a low side driver both electrically connected to power the computing component with voltage-regulated power;
a current sensor contained in the integrated circuit die to measure a monitored current (Imon) value of the voltage-regulated power; and
a temperature sensor contained in the integrated circuit die to measure a temperature value at one location of the integrated circuit die, wherein a temperature value sensed at the location has a nonlinear temperature coefficient relationship with a second temperature of the high side driver; and
a VR controller in communication with the current sensor and the temperature sensor and which executes instructions that configure the VR controller to;
receive the Imon value from the current sensor;
receive the temperature value from the temperature sensor;
determine a temperature-compensated Imon value based at least in part on the Imon value, the temperature value, and an empirically-derived temperature coefficient defined at the Imon value and the temperature value; and
control the voltage-regulated power at least in part based on the temperature-compensated Imon value.
14 Assignments
0 Petitions
Accused Products
Abstract
An information handling system (IHS) includes temperature-compensated power control by a voltage regulation (VR) module to: (i) receive a monitored current (Imon) value from a current sensor integrated into the VR module; (ii) receive a temperature value from the temperature sensor also integrated into the VR module; (iii) determine a temperature-compensated Imon value based at least in part on the Imon value, the temperature value, and an empirically-derived temperature coefficient defined at the Imon value and the temperature value; and (iv) control the voltage-regulated power at least in part based on the temperature-compensated Imon value. The empirically-derived temperature coefficient adjusts for nonlinear portions of temperature coupling relationship between a portion of an integrated circuit (IC) die that can include the current sensor and the temperature sensor and a temperature experienced by by active portion of VR module.
25 Citations
16 Claims
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1. An Information Handling System (IHS) having temperature-compensated power control, the IHS comprising:
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a computing component; a voltage regulation (VR) module comprising; an integrated circuit die; a power stage component contained in the integrated circuit die and comprising a high side driver and a low side driver both electrically connected to power the computing component with voltage-regulated power; a current sensor contained in the integrated circuit die to measure a monitored current (Imon) value of the voltage-regulated power; and a temperature sensor contained in the integrated circuit die to measure a temperature value at one location of the integrated circuit die, wherein a temperature value sensed at the location has a nonlinear temperature coefficient relationship with a second temperature of the high side driver; and a VR controller in communication with the current sensor and the temperature sensor and which executes instructions that configure the VR controller to; receive the Imon value from the current sensor; receive the temperature value from the temperature sensor; determine a temperature-compensated Imon value based at least in part on the Imon value, the temperature value, and an empirically-derived temperature coefficient defined at the Imon value and the temperature value; and control the voltage-regulated power at least in part based on the temperature-compensated Imon value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of temperature-compensated power control of an information handling system (IHS), the method comprising:
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measuring, by a current sensor contained in an integrated circuit die, a monitored current (Imon) value of voltage-regulated power by a power stage having a high side driver and a low side driver contained in the integrated circuit die; measuring a temperature value using a temperature sensor at one location of the integrated circuit die having a nonlinear temperature coefficient with the high side driver; retrieving an empirically-derived temperature coefficient at the Imon value and the temperature value; determining a temperature-compensated Imon value based at least in part on the Imon value and the temperature value; and controlling a level of the voltage-regulated power at least in part based on the temperature-compensated Imon value. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of deriving temperature compensation parameters for voltage regulation of an information handling system (IHS), the method comprising:
a testing system; setting current loading of a voltage regulator; sampling output voltage of the voltage regulator; measuring an average temperature of the voltage regulator; forming an output current matrix as an array based on the sampled output voltage and the measured average temperature; calculating nonlinear thermal coefficients as a function of current offset based on an average temperature and the output current matrix; and storing parameters of the thermal coefficient values in a temperature coefficient lookup table. - View Dependent Claims (14, 15, 16)
Specification