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Efficient regulated power supply circuit

A stabilized power supply circuit, high-efficiency technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as loss, and achieve the effect of improving power efficiency and reducing input current

Inactive Publication Date: 2013-05-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But like a linear regulator, a part of the current in the circuit does not pass through the load, and the power generated by this part of the current is also useless loss

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0014] The invention utilizes an unstabilized isolated DC-DC circuit to partially convert useless power consumed by a stabilized power supply circuit into a part of output power.

[0015] figure 2 The circuit shown consists of an unregulated isolated DC-DC circuit and a voltage regulator, along with inductors and capacitors. The unregulated isolated DC-DC circuit provides input voltage and current to the voltage regulator. The role of inductance and capacitance as auxiliary components is to reduce voltage fluctuations. The input voltage of the circuit V I and the output voltage V O It can be both positive and negative at the same time. Only V will be discussed below. I >V O >0 case. V I O The case of <0 is similar and will not be repeated here.

[0016] The positive terminal of the input port of the unstabilized isolated DC-DC circuit is connected to the positive terminal of the input voltage of the entire circuit, and its negative terminal is connected to the positiv...

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PUM

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Abstract

The invention discloses an efficient regulated power supply circuit. A part of power consumed by the flow of input current in the regulated power supply circuit through a circuit of which the voltage drop is a difference between an input voltage and an output voltage is converted into a part of output power by using an unregulated isolated DC-DC (Direct Current to Direct Current) circuit, so that the input current of the circuit is reduced, and the power efficiency of the entire regulated power supply circuit is increased. The regulated power supply circuit provided by the invention mainly comprises the unregulated isolated DC-DC circuit, a voltage regulator, an inductor and a capacitor, wherein the output port of the unregulated isolated DC-DC circuit is connected with the input port of the voltage regulator, and is used for supplying input power to the voltage regulator; the output voltage of the voltage regulator is the output voltage of an entire regulated power supply; the input port of the unregulated isolated DC-DC circuit and the output ports of the inductor and the regulated power supply are serially connected in sequence; and the input voltage of the regulated power supply circuit is applied to the two ends of a series circuit.

Description

technical field [0001] The invention relates to a voltage-stabilizing power supply circuit, in particular to a high-efficiency voltage-stabilizing power supply circuit. Background technique [0002] Currently, regulated power supplies are widely used in electronic equipment. The mains power is converted into an unstable DC voltage through a transformer, rectifier and filter, and finally a stable voltage is output from a regulated power supply to the circuit for use. For battery-powered electrical appliances, since the battery power decreases with time, electrical appliances that have certain requirements for the stability of the power supply voltage also need a regulated power supply to convert the battery voltage into the required stable power supply voltage. The power efficiency of a regulated power supply is the ratio of its output power to input power, reflecting its utilization rate of input power. A regulated power supply with high power efficiency has little energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/04H02M3/06
Inventor 方晖葛中芹高健
Owner NANJING UNIV
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