V<2>-PT modulation method of switch power supply, and V<2>-PT modulation device of switch power supply

Abstract

The present invention discloses a V<2>-PT modulation method of a switch power supply, and a V<2>-PT modulation device of the switch power supply. The method is characterized in that when an input voltage or an output voltage changes suddenly, a V<2> control device is added in front of a PT control device to improve the adjustment rate of the output voltage, and comprises the steps of turning on a switching tube, using a power supply E to charge an inductor L, and building up the output voltage; after an error of the output voltage and a reference voltage is amplified, comparing with the output voltage; selecting a corresponding power pulse signal according to a signal outputted by a comparator; sending the corresponding power pulse signal to a control circuit to drive a field effect transistor to work, so that the whole circuit forms the closed control. The switch power supply of the present invention enables the adjustment rate of the output voltage to be improved. The most important characteristics of the V<2>-PT modulation are that the application range of the device can be expanded by changing the adjustment rate of the output voltage, the V<2>-PT modulation is more suitable for being used in a voltage regulator module (VRM) by being compared with the general PT control, and the V<2>-PT modulation has a larger reference value for designing the VRM.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a switching power supply V 2 -PT modulation method and apparatus thereof. Background technique [0002] With the rapid development of power electronic technology, power electronic equipment has an increasingly close relationship with people's work and life, and electronic equipment is inseparable from a reliable power supply. Compared with traditional linear regulated power supply, switching power supply has the advantages of high efficiency and small size, which makes switching power supply technology gradually become a hot spot of people's application and research. The rapid development of power electronic devices has provided a large development space for switching power supplies, making them develop in the direction of small size, light weight, high efficiency, and high power density, which has attracted extensive attention from industry insiders and has broad application prospec...

AI Technical Summary

Problems solved by technology

[0004] In addition, the currently used pulse sequence modulation switching converter has the following disadvantages: in the topology of the switching power supply, the output voltage does not exist independently of the input voltage, so that the adjustment rate of the output voltage is not good

Therefore, the application of the PT control topology in the voltage regulator module (Voltage Regulator Module, VRM) is largely limited.

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