Single-stage high-voltage DC LED switching power supply

A high-voltage DC and switching power supply technology, applied in the power supply field, can solve the problems of low power conversion efficiency and increased power consumption, and achieve the effects of simplifying interface signals, increasing power conversion power, and improving power conversion efficiency

CN109714855AActive Publication Date: 2019-05-03杭州兴达电器工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-05-03

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Abstract

The invention provides a single-stage high-voltage DC LED switching power supply comprising a main circuit and a control circuit. The main circuit comprises an HVDC input EMC unit, a non-isolating step-down switch circuit unit, an output EMC unit, a signal acquisition unit, a switch signal driving unit, and a first primary signal interface unit. The control circuit comprises a standby power supplyunit, a digital power controller unit, a signal isolation unit, a primary signal conditioning unit, a secondary signal conditioning unit, a communication programming interface unit, a second primarysignal interface unit, and a secondary signal interface unit. In the main circuit, an existing active flyback clamp method is improved to the flyback buck step-down circuit to improve the power conversion power. In the control circuit, an existing control module circuit is integrated with the standby power supply unit and the primary and secondary signal isolation coupling circuits. According to the invention, the power conversion efficiency is improved by limiting the implementation cost and complexity of the circuit.
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Description

technical field

[0001] The invention relates to the technical field of power supplies, in particular to a single-stage high-voltage direct-current power supply LED switching power supply. Background technique

[0002] Switching power supply is developed from linear regulated power supply, and with the rapid development of technology, it has been widely popularized as a common product in life.

[0003] As a high-efficiency isolated LED switching power supply, the existing mainstream scheme adopts a single-stage switching power supply scheme, and its switching circuit adopts a single-stage switching power supply scheme. The topology of its switching circuit adopts a flyback switching power supply circuit to obtain the most The cost performance is good, but the power conversion efficiency is low. The root cause is that there is a fixed power consumption in the clamping circuit part of the switching circuit, and the power consumption of this part will double with the increase of...

Examples

Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Such as figure 1 As shown, in the embodiment of the present invention, a single-stage high-voltage DC power supply LED switching power supply is proposed, including a main circuit and a control circuit.

[0037] The main circuit includes an HVDC input EMC unit, a non-isolated step-down switch circuit unit, an output EMC unit, a signal acquisition unit, a switch signal drive unit and a first primary signal interface unit; wherein,

[0038] The HVDC input EMC unit is connected to the non-isolated step-down switch circuit unit and the signal acquisition unit, the non-isolated step-down switch circuit unit is connected to the signal acquisition unit and the output EMC unit, and the signal acquisition unit is connected to the first primary signal interface unit....