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Digital pre-compensation for voltage slewing in a power converter

A digital control, slew rate technology, applied in instruments, electrical components, regulating electrical variables, etc., can solve problems such as hindering power saving and efficiency

Active Publication Date: 2018-07-31
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described above with respect to Figures 1b and 1c, the effects of propagation delay and system dynamics in limiting the response of conventional power management systems thus hinder the ability to achieve the many desired power savings and efficiencies in these modern systems

Method used

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  • Digital pre-compensation for voltage slewing in a power converter
  • Digital pre-compensation for voltage slewing in a power converter
  • Digital pre-compensation for voltage slewing in a power converter

Examples

Experimental program
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Embodiment Construction

[0015] The described embodiments provide circuits and methods for altering the slew rate of a control signal applied by a digital-to-analog converter (DAC) to compensate for system dynamics in a power management system.

[0016] The described embodiments provide such circuits and methods that can be efficiently implemented in the digital control circuitry of the system.

[0017] The described embodiments provide such circuits and methods that provide significant flexibility in the ability to tune the compensation.

[0018] One or more of the embodiments described in this specification are implemented into digital logic circuits involved in generating the power converters or voltage regulators that go to larger scale systems such as microprocessor or microcontroller based systems. input, and thus the embodiments are advantageous in that context. However, example embodiments may be advantageously applied to other applications, such as digital control of any time-varying power l...

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Abstract

In described examples of control logic (12) for producing a digital input (DV) to a digital-to-analog converter (DAC) (14) in a power converter system (20), the control logic (12) selects from among aplurality of slew rates during a transition of an output voltage (Vo) in response to a change in the desired setpoint (SETPT), so that the output voltage (Vo) transition follows a desired nominal slew rate. In an initial interval of the transition, a steeper slew rate than the nominal slew rate is selected by the control logic (12) for the digital input (DV) to the DAC (14), until the digital input (DV) to the DAC (14) exceeds the nominal slew rate by a first parameter value. At that point, a slew clamp is applied to advance the digital input (DV) at the nominal slew rate. Upon the digital input (DV) approaching the setpoint value to within a second parameter value, a flatter slew rate than nominal is applied.

Description

technical field [0001] The present invention relates generally to power management and control systems, and more particularly to control of digital-to-analog converter inputs to power converters. Background technique [0002] The power consumed by modern electronic systems is an increasingly important factor for a number of reasons. Such reasons are the increasingly widespread use of mobile and other battery-powered systems, such as smartphones, tablet computers, wearable devices, and indeed implanted medical devices, where battery power conservation is very important. Furthermore, the available system life of multiple networked sensors and controllers in the so-called Internet of Things (IoT) can be limited by battery life, especially when implemented in remote locations. Power consumption is important even for electronic computing systems powered from line power, for thermal considerations, and from an energy conservation standpoint. [0003] These issues have prompted t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/00G05F1/10
CPCG05F1/10H03K5/12
Inventor 迈克尔·T·迪伦佐布赖恩·A·卡朋特
Owner TEXAS INSTR INC