A booster circuit and its implementation method

Abstract

The invention discloses a boosted circuit and an implementation method, and belongs to the technical field of asymmetrical digital subscriber loop (ADSL) circuit design. The boosted circuit specifically comprises a power supply chip, a charging circuit and a discharging circuit. The charging circuit comprises a charging switch, a charging capacitor and a charging diode. The discharging circuit comprises a discharging switch and a discharging diode. The charging diode and the discharging diode are Schottky diodes. The power supply chip is a direct current (DC)-DC boosted chip. Charge-discharge operation on the circuit can be carried out by utilizing of the design of the boosted circuit. The boosted circuit has the advantages that storing voltage of an energy-storage capacitor can be improved through the boosted circuit, storing energy of capacitors with the same volume is synchronously improved, the problem of needing a large number of the capacitors is solved, and the problem that a surge current is overlarge in the moment of starting up is also solved.

Description

technical field [0001] The invention relates to the technical field of ADSL circuit design, in particular to a voltage boosting circuit and a realization method. Background technique [0002] At present, in ADSL (Asymmetric Digital Subscriber Line, asymmetric digital subscriber line) products and some other network products, due to the product's own characteristic requirements, it is required that the product can still maintain a short working time after power failure, so that the product can be in harmony with the local network. The server at the end communicates and releases the IP. Due to the existence of this requirement, products with this function often need to add some large-capacity electrolytic capacitors to store energy at the input end of the main power supply for energy storage, but there are two obvious problems in such a circuit ; The first problem is that due to the excessive capacitance, the excessive impact current at the moment of starting up will cause da...

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Problems solved by technology

Due to the existence of this requirement, products with this function often need to add some large-capacity electrolytic capacitors to store energy at the input end of the main power supply for energy storage, but there are two obvious problems in such a circuit ;The first problem is that due to the excessive capacitance, the excessive impact current at the moment of starting up will cause damage to the electronic components.

The second problem is that due to the high requirement for stored energy, the number of required capacitors will be relatively large, which will take up a lot of PCB (Printed Circuit Board, printed circuit board) area, so that the volume of the product is very large. bigger, more expensive

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