High-voltage constant-current drive circuit and LED light source with same

A drive circuit, high-voltage constant-current technology, applied in the field of power supply, can solve the problems of high resource requirements, low efficiency, environmental protection, etc., and achieve the effect of small working current, low cost, and simplified structure

Inactive Publication Date: 2014-01-15
TIANJIN JINMA PHOTOELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technical solution still has the problem of excessive application of IC chips, high requirements on resources, unfavorable to en

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  • High-voltage constant-current drive circuit and LED light source with same
  • High-voltage constant-current drive circuit and LED light source with same

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 2 As shown, the high voltage constant current driving circuit of the present invention includes resistors R1, R2, a bridge rectifier circuit 6 and a three-terminal stabilized voltage regulator 7, and the input terminals of the rectifier circuit are connected to the external alternating current through resistors R1 and R2 respectively. connected, the input end of the three-terminal stabilized power regulator is connected to the positive output of the rectifier bridge circuit 6, and the output end of the three-terminal stabilized power regulator is connected to a high-impedance load to supply energy to it, so The GND terminal of the three-terminal stabilized powe...

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Abstract

The invention discloses a high-voltage constant-current drive circuit which comprises a rectifier module and a constant-current module. The constant-current module is a stabilized voltage supply regulator, the input end of the stabilized voltage supply regulator is connected with the positive electrode output of the constant-current module, and the output end of the stabilized voltage supply regulator is connected with a high-impedance load. The GND end of the stabilized voltage supply regulator is connected with a feedback resistor in series and then is connected with the output end of the stabilized voltage supply regulator. The negative electrode of an LED chip is connected with the negative electrode output of the rectifier module or is connected with the ground. Meanwhile, the invention further discloses an LED light source with the circuit. The stabilized voltage supply regulator is creatively used as a constant current controller, and controls the rectified alternating currents directly in a constant-current mode and then supplies the currents to the high-impedance load. The magnitude of the output constant currents of the output can be conveniently regulated through changing of the feedback resistor, the structure is concise, cost is low, and market competitiveness is effectively improved.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a high-voltage constant-current drive circuit and an LED light source using the circuit. Background technique [0002] The linear constant current drive circuit, which converts the general AC circuit into a DC circuit, has always been a commonly used drive circuit in daily life and work. It can be used to drive DC devices such as LEDs, but the current linear constant current drive circuit generally uses It is driven by an ordinary IC chip, and the driving current is controlled by the IC chip. However, the IC chip has a limited drive output capability and cannot output a high-voltage linear constant current drive current. As a result, in order to obtain a high-voltage linear constant current drive current, multiple devices are used. Block IC chips are superimposed for output, which will lead to excessive application of IC chips, which requires high resources and is not cond...

Claims

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Application Information

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IPC IPC(8): H05B37/02F21S2/00F21V23/00F21Y101/02F21K9/20F21Y115/10
Inventor 田景明张荣民
Owner TIANJIN JINMA PHOTOELECTRIC
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