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Multipath direct current power supply circuit

A DC power supply and circuit technology, which is applied to the layout of lamp circuits, electric light sources, lighting devices, etc., can solve the problems of low power density, large excitation current, and low current sharing efficiency

Active Publication Date: 2012-05-16
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively large size and large number of current sharing transformers, the overall volume of the circuit to realize the circuit is large and the power density is low; The excitation current on the circuit is large, the power loss of the current sharing transformer is large, and the current sharing efficiency is low

Method used

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Embodiment Construction

[0037] Hereinafter, the implementation of the multi-channel DC power supply circuit in the embodiment of the present invention will be described in detail in conjunction with the accompanying drawings.

[0038] In the first multi-channel DC circuit, the circuit includes: an AC source and at least two power supply branches; wherein, the first output end of the AC source is connected to the first input end of each power supply branch through a common capacitor; the second The two output ends are connected to the second input end of each power supply branch.

[0039] Each power supply branch can include: a diode connected in series and a filter capacitor, the cathode of the diode is connected to the filter capacitor, wherein the anode of the diode is used as the first input end of the power supply branch, and the end of the filter capacitor that is not connected to the diode is used as The second input terminal of the power supply branch circuit; also includes a common diode, the...

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PUM

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Abstract

The invention discloses a multipath direct current power supply circuit, which comprises an alternating current source and at least two paths of power supply branch circuit, wherein the first output end of the alternating current source is connected with the first input end of each path of power supply branch circuit through a common capacitor; and the second output end of is connected with the second input end of each path of power supply branch circuit. The invention also discloses another multipath direct current power supply circuit. The two power supply circuits are high in efficiency, low in cost and good in flow equalization performance.

Description

technical field [0001] The invention relates to power supply technology, in particular to a multi-channel direct current power supply circuit. Background technique [0002] At present, for LED constant current control driven by multiple LEDs, the most commonly used solution is a constant voltage module + multiple non-isolated DC / DC constant current modules. [0003] Such as figure 1 Shown is an LED constant current control circuit driven by multiple LEDs in the prior art. In this circuit, the input voltage Vac is used as the input of multiple non-isolated DC / DC constant current modules after passing through the constant voltage module, and each non-isolated DC / DC constant current module performs constant current control independently. However, since the voltage of the constant voltage module and the voltage of the LED generally have a large voltage difference, the efficiency of the multi-channel non-isolated DC / DC constant current module in the subsequent stage will not be...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 吴新科华桂潮
Owner INVENTRONICS HANGZHOU
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