Wide-range single-inductor multiple-output converter

A multi-output, single-inductor technology, used in output power conversion devices, regulating electrical variables, converting DC power input to DC power output, etc. problem, to achieve the effect of less devices, small ripple voltage, and small size

Inactive Publication Date: 2014-07-16
杨飏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working characteristics of the converter are related to the working mode. When the single-inductor multiple-output converter works in the discontinuous conduction mode, there is no cross effect between the output branches, but there are disadvantages of large inductor current ripple and stress under heavy load conditions. Continuous conduction mode multi-output converter has strong load capacity, but there is cross influence between output branches

Method used

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  • Wide-range single-inductor multiple-output converter
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  • Wide-range single-inductor multiple-output converter

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Wide range single inductor multiple output converters including:

[0017] Main power circuit, including transformer FT, switch tube S 1 , Diode D fw , freewheeling switch tube S 2 , a group of secondary branch diodes D oa (a=1~n), a group of secondary side branch switch tube S ob (b=1~n), a set of output filter capacitor C oc (c=1~n); one end of the primary side of the transformer FT and the diode D fw The cathodes are connected, the diode D fw Anode and freewheeling switch S 2 The drain connection of the switching tube S 1 The source and freewheeling switch S 2 The other end of the primary side of the transformer FT is connected to the freewheeling switch tube S 2 and switch tube S 1 Connected to the common end of the transformer FT; one end of the secondary side of the transformer FT is respectively connected to a group of secondary side branch diod...

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Abstract

The invention provides a wide-range single-inductor multiple-output converter which comprises a main power circuit, a follow current loop, a switching element and a feedback control circuit. When a secondary side current is is reduced to a follow current reference value, a switching tube S2 is closed, an original current is kept at a constant value through the switching tube S2 and a diode Dfw until a switching tube S1 is switched on again; the switching element is used for controlling on-off of the circuit and guaranteeing that the circuit works in a pseudo continuous electric conduction mode, and meanwhile all output branched circuits multiplex one transformer in a time-division mode. The feedback control circuit is connected with the switching element and the main power circuit and used for feeding back, controlling and adjusting output voltage or currents of all the output branched circuits, and therefore the output voltage or the currents are kept constant. The converter is simple in structure, small in size, low in cost capable of achieving wide-range output and beneficial to improving production efficiency, components are few, and no intersection influence exists among all the output branched circuits.

Description

technical field [0001] The invention relates to electric power supply equipment, especially power supply equipment requiring multiple levels of power supply voltages and avoiding cross-effects between different levels of power supply voltages, and in particular to a wide-range single-inductance multi-output converter. Background technique [0002] Portable electronic products such as mobile phones require multiple power supply voltages of different levels. However, a multi-output switching converter with multiple output windings has serious cross-effects between outputs. All output branches of the single-inductance multi-output switching converter share one magnetic element, which can realize precise regulation of all output branches and reduce the volume and cost of the converter. The working characteristics of the converter are related to the working mode. When the single-inductor multiple-output converter works in the discontinuous conduction mode, there is no cross effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 杨飏何莹莹
Owner 杨飏
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