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

A V2-PT, switching power supply technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problem of poor output voltage regulation rate, etc., to achieve the effect of improving the regulation rate, expanding the scope of application, and increasing the reference value

CN104158398AInactive Publication Date: 2014-11-19CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-11-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

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Embodiment Construction

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] The technical method of the present invention to solve the problem is: when the input voltage or the output voltage suddenly changes, by adding a V 2 The control device is used to improve the regulation rate of the output voltage. The specific technical scheme adopted is: compare the output voltage with the error voltage, when the output voltage is greater than the error voltage, the controller generates a low-power control pulse as the driving signal of the switch; on the contrary, when the output voltage is lower than the error voltage, the control The controller generates high-power control pulses as the driving signal of the switch tube.

[0030] Another object of the present invention is that the output ripple voltage as the pulse selection signal of the inner loop control can quickly adjust the input voltage and the influence of th...