Satellite-borne active clamping normal shock power supply MOS tube isolation driving circuit

Abstract

The invention discloses a satellite-borne active clamping normal shock power supply MOS tube isolation driving circuit which comprises two functional modules, namely, a waveform conversion module and an isolation drive module, wherein the waveform conversion module is used for converting PWM square waves generated from a PWM control circuit into complementation square waves of which two paths of dead-time can be adjusted; the partitioning driving module is used for implementing isolation conversion on the square waves generated from the waveform conversion module, and is subsequently used for driving an MOS tube in the an active clamping normal shock circuit. By adopting the MOS tube isolation control circuit disclosed by the invention, the problem that PWM control signals of an active clamping normal shock power supply cannot be acquired as no active clamping normal shock PWM control chip exists in a satellite-borne product is solved. In addition, with the combination of the circuit and a plurality of satellite-borne PWM control circuits, MOS tube driving control waveforms for generating the active clamping normal shock power supply can be generated, isolation drive control on a switch MOS tube in the active clamping normal shock power supply can achieved, and application of the active clamping normal shock power supply in the satellite-borne product is achieved.

Description

technical field [0001] The invention relates to a MOS tube control circuit, in particular to a star-loaded active clamp forward power supply MOS tube isolation drive circuit. Background technique [0002] In an active clamp forward power supply, it is necessary to switch and control two switching MOS tubes. The main switch MOS tube is used to control the transfer of energy in the forward transformer, and the upper clamp MOS tube is used to control the magnetic reset of the forward transformer. The gate-source voltages of the two MOS transistors are two sets of complementary PWM (pulse width modulation) control voltages with the same frequency and a certain dead time. Moreover, the source voltage of the upper clamp MOS transistor varies with the drain voltage of the main switch MOS transistor, so the gate control waveform voltage of the upper clamp MOS transistor also changes. [0003] In the active clamp forward circuit, the control voltage of the upper clamp MOS tube and ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the active clamp forward power supply cannot be applied to on-board products, especially to solve the problem that there is no active clamp PWM control chip in the on-board product, and the PWM control signal of the active clamp forward power supply cannot be obtained. question

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