A dc/dc circuit, simo converter, microsatellite power supply system and working method

Abstract

The invention discloses a dual-output DC / DC converter circuit, comprising power switch tubes (Q1, Q2), diodes (D1-D4), capacitors (Co1, Co2), transformer T and inductor L; on the primary side of the transformer T , the drain of the switch tube Q1 is connected to the input terminal, the opposite end of the transformer T primary coil and the capacitor Co1 are connected to an output end Vo1; the same name end of the primary coil is connected to the source of the switch tube Q1 and the cathode of D1, and the anodes of Co1 and D1 are connected to the front stage Ground; the T secondary coil with the same name is connected to the anode of diode D2, the inductor L is connected to the cathode of D2 and the cathode of D3, the other end of L is connected to the drain of Q2 and the anode of D4; the cathode of D4 is connected to the other output terminal Vo2 and Co2, the other end of Co2, T times The opposite end of the primary coil, the anode of D3, and the source of Q2 are connected to the post-stage ground. The invention also discloses a SIMO converter with the circuit and a micro-satellite power supply system. The invention also discloses its working method, the switching tubes Q1 and Q2 are turned on synchronously, and the stable output of the two output terminals is realized.

Description

technical field [0001] The invention relates to the technical field of DC / DC circuit topology, in particular to a DC / DC circuit, a SIMO converter, a micro-satellite power supply system and a working method. Background technique [0002] In the fields of communication, medical treatment, and industrial automation, electronic equipment often requires multiple power supply ports to meet the power supply requirements of different input voltages. The single-input multiple-output (SIMO) converter is a more economical and affordable solution. A high-efficiency, low-cross-regulation SIMO module is connected between the busbar and the power supply terminal to supply power to multiple loads at the same time, realizing the system stable job. Sometimes the bus voltage and supply terminals need to be galvanically isolated for safety. [0003] At present, the SIMO converter that is widely used is a dual-output Buck converter, that is, two parallel switch tubes are added after the output...

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a dual-output DC / DC converter circuit, which solves the problem that the electrical isolation of the input and output cannot be realized at present, and the cross-regulation rate of the two outputs is poor.

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