Wide-range input direct-current rectification filter circuit
A rectification filter circuit, filter circuit technology, applied in emergency protection circuit devices, electrical components, output power conversion devices and other directions, can solve problems such as unfavorable safe and stable operation of vehicles, shortening the service life of related equipment, unstable load current, etc. Achieve the effect of low power consumption, high reliability and wide variation range
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[0009] The following further describes the embodiments of the invention in conjunction with the drawings:
[0010] Reference attached figure 1 As shown, the embodiment of the present invention is composed of an overcurrent protection circuit 1, an overvoltage protection circuit 2, a filter circuit 3, a step-down circuit 4, a step-up circuit 5, and an output circuit 6. E11 is an electrolytic capacitor of 680uF, E4 and E10 are electrolytic capacitors or tantalum capacitors of 470 uF and 1000 uF respectively, C12 and C20 are ceramic dielectric capacitors, and the voltage stabilization values of Zener diodes Z15 and Z20 are 20V, 24V, and U2 respectively. It is a TOP104 PWM switch tube, U3 is an LM2575HV-5.0 integrated voltage regulator module, D16 and D17 are selected with short reverse recovery time, low forward voltage drop, high reverse breakdown voltage, and good switching characteristics Fast recovery diodes or Schottky diodes are used as freewheeling diodes. The energy stora...
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