A switching power frequency conversion control circuit applied to a new energy vehicle and a design method thereof

Abstract

The invention discloses a switching power frequency conversion control circuit applied to a new energy vehicle, comprising a UC384X series chip, a transistor Q1, a transistor Q2, a resistor R3, a resistor RT and a capacitor CT, wherein one end of the resistor RT and the capacitor CT connected in series is connected with the eighth pin of the UC384X series chip. The terminals of the resistor RT andthe capacitor CT are connected to the fourth pin of the UC384X series chip, and are connected to the collector of the transistor Q2 through the resistor R4. The base of the transistor Q2 and the collector of the transistor Q1 are connected to the eighth pin of the UC384X series chip through the resistor R1. The base of transistor Q1 is connected to the first pin of UC384X series chip through resistor R2. The invention also discloses a design method of the switching power supply frequency conversion control circuit applied to a new energy vehicle. The circuit has the advantages of high workingreliability and high frequency modulation response speed, and can greatly improve the overall efficiency of the switching power supply.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a switching power supply frequency conversion control circuit applied to new energy vehicles and a design method thereof. Background technique [0002] Since the appearance of the automobile, its function has changed from a primitive way of transportation to a necessity of people's life. With the popularity of automobiles, the environmental pollution and energy crisis caused by them are attracting more and more attention, and new energy vehicles have emerged as the times require. The development of the new energy automobile industry is an important measure to implement the national energy transformation and upgrading strategy. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and other new energy vehicles. Among them, pure electric vehicles, extend...

AI Technical Summary

Problems solved by technology

If the switching power supply frequency conversion control circuit applied to new energy vehicles can be realized based on the UC384X series chips combined with simple peripheral circuits, it will effectively solve the problems existing in frequency modulation control in the prior art, and can provide new energy vehicles with small volume and high power. A switching power supply with high density and stable and reliable operation; however, the prior art still lacks a simple circuit structure, convenient implementation and low cost, high reliability, stable performance, and fast frequency modulation response, which can greatly improve the overall efficiency of the switching power supply. , Easy-to-use switching power supply frequency conversion control circuit for new energy vehicles based on UC384X series chips

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