Quick start digital power based on integral separation structure

Abstract

The invention discloses a quick start digital power based on an integral separation structure. The quick start digital power comprises a power level unit, an analog-digital converter unit, a judgment unit, a compensation control unit and a digital PWM (Pulse Width Modulation) unit; the judgment unit comprises an absolute value operation module, a threshold comparison module and a logical selection module; the compensation control unit comprises a PID (Proportion Integration Differentiation) controller and a PD controller; in the process of starting a digital power supply, the analog-digital converter unit is used for converting the difference between reference voltage and power level output voltage into a digital value; a threshold value is set in the judgment unit, the digital value is enabled to enter the PD controller when a digital absolute value is greater than threshold voltage, and the digital value is enabled to enter the PID controller when the digital absolute value is less than the threshold voltage, wherein the PWM unit is used for converting a duty ratio value output by a corresponding controller into the on and off of the duty ratio waveform control power level, and the power level output voltage is quickly adjusted to the reference voltage by adjustment of the two controller, so as to realize the quick start of the digital power supply.

Description

technical field [0001] The invention relates to a digital power supply in the field of switching power supplies, in particular to a fast-start digital power supply based on an integral-separation structure. Background technique [0002] With the rapid development of the electronic information industry, the digital power supply system is the basic equipment of the information system, and its performance directly affects the entire information system. The digital power supply has the characteristics of high reliability, high integration, flexible design, and performance optimization. In the field of switching power supply, the performance is higher than that of analog switching power supply, and it is widely used in the power supply system of electronic equipment. However, there are steps such as data sampling, quantification, and data processing in digital power supply, which cause loop delay and affect the stability of digital power supply. and responsiveness. The commonly ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the electronic information industry, the digital power supply system is the basic equipment of the information system, and its performance directly affects the entire information system. The digital power supply has the characteristics of high reliability, high integration, flexible design, and performance optimization. In the field of switching power supply, the performance is higher than that of analog switching power supply, and it is widely used in the power supply system of electronic equipment. However, there are steps such as data sampling, quantification, and data processing in digital power supply, which cause loop delay and affect the stability of digital power supply. sex and responsiveness

The commonly used compensation control method in digital power supply is classical PID control. Classical PID control is the most commonly used control method. It has a series of advantages such as intuitiveness, simple implementation, and good robust performance. It is widely used in the field of control. However, in PID control The purpose of the integral link is mainly to eliminate the static error and improve the accuracy. When the power supply is started, the system output has a large deviation in a short period of time, which will cause the integral accumulation of the PID calculation, cause a large overshoot of the system, and even cause the system to overshoot. Large oscillations, which are absolutely not allowed in production

If the start-up time and overshoot are relatively large during the start-up process of the digital power supply, which cannot meet the high-speed start-up of the digital power supply, it cannot be applied to the power supply system that requires fast response.

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