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Unloaded output end allowing load driver and method applied to same

An output terminal and driver technology, applied in output power conversion devices, DC power input into DC power output, instruments, etc., can solve problems such as increasing cost, reducing driver efficiency, adding additional components, etc. Effect

Inactive Publication Date: 2013-10-23
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, as shown in Figure 1b, the LED driver uses a single-stage flyback PFC+buck converter. This multi-output structure allows the output end to be unloaded. However, for example, CH2 is loaded at the output end and CH1 Step-down transformer 1 cannot be completely turned off when floating
Therefore, the efficiency of the driver is reduced in this case, and at the same time, due to the need for a buck converter, an additional component is added, which increases the cost

Method used

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  • Unloaded output end allowing load driver and method applied to same
  • Unloaded output end allowing load driver and method applied to same
  • Unloaded output end allowing load driver and method applied to same

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Embodiment Construction

[0018] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. For ease of illustration, in the described exemplary embodiments, a light emitting diode (LED) is used as a load, and the LED driver is a driver using a single-stage flyback PFC circuit with multiple outputs. However, it should be understood that the structure of the load and driver applied in the present invention is not limited thereto, and the embodiments described here are only for illustration rather than limiting the present invention. The scope of the present invention is limited only by the appended claims and their equivalents.

[0019] It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity. In addition, it should be emphasized that the term "comprising / ...

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Abstract

The invention disclose an unloaded output end allowing load driver and a method applied to the same. The load driver comprises a plurality of output ends and a switch device, wherein the plurality of the output ends are configured in such a way that a plurality of driving voltages or currents are respectively output to loads by the plurality of the output ends, the switch device is connected between a first output end and a second output end among the plurality of the output ends, the switch device is configured in such a way that the first output end and the second output end are connected through the switch device when the first output end or the second output end is unloaded, and therefore the first output end and the second output end are enabled to be connected in aparallel.

Description

technical field [0001] The present invention relates generally to the field of load drivers and, in particular, to a load driver capable of allowing some of a plurality of outputs to be unloaded. The invention also relates to a method for a load driver having a plurality of outputs to allow some of the plurality of outputs to be unloaded. Background technique [0002] In load drivers that require high output power, multiple outputs can be used in order to meet relevant safety standards, etc. However, there is a problem with the existing multi-output driver, that is, each output must be loaded or not loaded at the same time, otherwise the driver will not work normally. At present, light-emitting diodes (LEDs) have been used more and more widely as a new type of green lighting source driven by DC. The above problems also exist in high-power LED drivers with multiple outputs. [0003] In order to make the use of LEDs safer, the driving voltage is usually required to be lower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 庄锡河林丹康宁波曹志坚
Owner OSRAM GMBH
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