Light-emitting diode power supply for illumination without transformer
A technology of light-emitting diodes and transformers, applied in light sources, electric light sources, lighting devices, etc., can solve the problems of bulkiness, high cost, and large volume, and achieve the effects of cost reduction, weight reduction, and power supply volume reduction
Active Publication Date: 2014-08-06
JIANGSU UNIV OF TECH
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[0003] The purpose of the present invention is to overcome the shortcomings of the existing common DC stabilized power supply with transformers, such as bulky, bulky, and high cost, and provide a DC stabilized power supply without a transformer for powering LEDs for lighting.
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[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] See figure 1, The light-emitting diode power supply for non-transformer lighting of the present invention is composed of a main circuit 1, a constant voltage constant current control circuit 2 and an LED power supply interface J1. The LED power supply interface J1 has a positive pole and a negative pole; the main circuit 1 is provided with an AC input terminal A1, a DC power supply output terminal A2, a first control signal input terminal A3, a second control signal input terminal A4, and a constant voltage constant current control circuit power supply output terminal A5; the constant voltage and constant current control circuit 2 is provided with a sampling voltage input terminal B2, a first control signal output terminal B3, a second control signal output terminal B4, a power supply terminal B5, a sampling current input termi...
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The invention provides a light-emitting diode power supply for lighting without a transformer, which includes a main circuit, a voltage-stabilizing constant-current control circuit and a light-emitting diode power interface; The capacitors are connected in series to divide the voltage and generate a DC output in the filter energy storage capacitor. When the AC power is input for the negative half cycle, the voltage divider capacitors pass through the corresponding isolation diodes, the shared first electronic switch and the inductor in turn to supplement the discharge of the filter energy storage capacitor to generate a DC output. The circuit; the constant voltage and constant current control circuit is a circuit that processes the sampled voltage signal and the sampled current signal and then feeds back to the main circuit to ensure the stability of the working voltage and current of the light emitting diode. The invention omits the transformer of the common light-emitting diode lighting power supply, thereby reducing the volume, weight and cost of the power supply.
Description
technical field [0001] The invention relates to a power supply for lighting, in particular to a transformerless DC stabilized power supply for powering light-emitting diodes. Background technique [0002] At present, common DC stabilized power supplies that provide power for light-emitting diodes (LEDs for short) for lighting all contain a transformer for step-down, so the volume cannot be made small and heavy, and the transformer is in the DC stabilized power supply. Occupy a large production cost. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the existing common DC stabilized power supply with transformers, such as large volume, bulkiness and high cost, and provide a DC stabilized power supply without a transformer for supplying power to light-emitting diodes for lighting. [0004] The technical solution of the present invention is: a light-emitting diode power supply for lighting without a transformer. The ...
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IPC IPC(8): H05B37/02
Inventor 赵良贝绍轶冯俊萍赵景波
Owner JIANGSU UNIV OF TECH