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Power supply circuit applied to led load

A technology of power supply circuit and circuit, which is applied in the field of power supply and can solve the problems of low output power control accuracy

Active Publication Date: 2018-09-04
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limited power output of the power supply circuit is mainly realized by limiting the peak value of the switching current of the DC / DC converter. Real trigger protection, so the control accuracy of output power is low

Method used

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  • Power supply circuit applied to led load
  • Power supply circuit applied to led load
  • Power supply circuit applied to led load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] figure 1 A structural block diagram of a power supply circuit applied to an LED load according to an embodiment of the present application is schematically shown. The power supply circuit 1 applied to LED loads includes: a power converter 11 , a first feedback module 12 , a second feedback module 13 and a control circuit 14 .

[0033] The power converter 11 is used for receiving an input voltage Vin and converting the input voltage Vin into a DC output voltage. For example, the power converter 11 may be an alternating current / direct current (AC / DC) converter or a direct current / direct current (DC / DC) converter.

[0034] The first feedback module 12 is electrically coupled to the output end of the power converter 11 for detecting the output voltage and output current of the power converter 11 and outputting a first feedback signal S1.

[0035] The second feedback module 13 is electrically coupled to the output end of the power converter 11 for detecting the output volt...

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PUM

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Abstract

Provided is a power supply circuit applied to LED loads, including: a power converter, used to convert an input voltage into a DC output voltage; a first feedback module, used to detect the output voltage and output current of the power converter, and output a The first feedback signal; the second feedback module, used to detect the output voltage and output current of the power converter, and output a second feedback signal, the second feedback module and the first feedback module are independent of each other; and the control circuit, used for output a control signal according to the first feedback signal from the first feedback module or the second feedback signal from the second feedback module, and control the power converter by means of the control signal so that the output power of the power converter is less than a predetermined power threshold . With the technical solution of the present application, even if a single feedback loop fails due to failure of a single component, the control of the output power of the power supply circuit can still be realized through another feedback loop.

Description

technical field [0001] The present application relates to the field of power supplies, and in particular to a power supply circuit applied to a light emitting diode (Light Emitting Diode, LED) load. Background technique [0002] Certain power supplies used in the United States are subject to safety regulations issued by the Underwriters Laboratory, specifically the UL 1310 Class 2 standard. Specifically, the UL1310 standard imposes limits on the voltage, current, and power output of a power supply classified as Class 2, and these limits must be strictly met even in the event of a single component fault. Taking the output power as an example, the power limit of the UL1310Class 2 power supply is not higher than 100W per output channel, and these channels / outputs can be configured to drive individual light sources, such as solid-state light sources (light-emitting diodes or organic light-emitting diodes), gas discharge Lamp or incandescent lamp, etc. [0003] A design solutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH02M3/33507H05B45/10H05B45/382H05B45/14H02M1/325H02M7/04H02M1/32H02M3/04H02M1/42
Inventor 王小博章兴华
Owner DELTA ELECTRONICS INC