Power source control device capable of dynamically adjusting driving ability

Abstract

The invention relates to a power source control device capable of dynamically adjusting driving ability. The power source control device comprises a rectifying unit, a power factor correction unit, a power source conversion unit and a feedback unit; the rectifying unit receives an alternating current input power source, rectifies the alternating current input power source to obtain a direct current power source, and transmits the direct current power source to the power factor correction unit for performing power factor correction processing on the direct current power source; a generated power factor corrected power source is transmitted to the power source conversion unit; the feedback unit is electrically connected with the power source conversion unit, so that a control loop can be formed; and the pulse width modulation driving controller of the power source conversion unit carries out adjustment processing according to the feedback signals of the feedback unit so as to control a switching transistor, so that the power factor corrected power source can be converted into an output power source which is provided for an external load. With the power source control device of the invention adopted, the optimal on current of the switching transistor can be realized, and electromagnetic interference margin can be increased, and switching loss can be reduced.

Description

technical field [0001] The present invention relates to a power control device for dynamic drive capability adjustment, especially for forward (Forward) architecture, full-bridge power conversion architecture, half-bridge power conversion architecture, boost (Boost) power conversion architecture, step-down ( The power conversion unit of the Buck) power conversion architecture can dynamically adjust the generated pulse width modulation drive signal according to the state of the switching transistor and consider the electromagnetic interference (EMI) and switching loss by performing adjustment processing to achieve dynamic The purpose of adjusting the driving capability of the switching transistor and improving the electrical quality and the overall source conversion efficiency. Background technique [0002] Power conversion technology is very important to the booming electronics industry, because different electronic products require different voltages or currents to operate....

AI Technical Summary

Problems solved by technology

However, the disadvantage of the prior art is that only different first gate resistors RG1 and second gate resistors RG2 can be configured to change the turn-on time and turn-off time of the switching transistor M1 by the driving signal VD1. Although the switching loss can be moderately reduced, However, electromagnetic interference cannot be reduced at the same time

That is, when the switching transistor needs to be turned on, the conduction current in the original off state is 0 or close to 0, so if the driving voltage rises rapidly at this time, it is not helpful to reduce the switching loss, but instead Will increase the adverse effects of EMI

On the other hand, when the switching transistor is partially turned on or fully turned on, the conduction current is quite large. At this time, if the driving voltage rises or falls slowly, it will cause a lot of power in the whole switching process. loss

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