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Low-voltage LED driving power source

An LED driving, low-voltage technology, applied in the field of low-voltage LED driving power supply, can solve problems such as low conversion efficiency, and achieve the effects of small saturation voltage drop, low loss, and low switching voltage

Inactive Publication Date: 2013-03-27
汤征宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Low-voltage LED drive power, especially very low DC voltage drive power, such as a single Ni-MH battery is only 1.2V, when the battery is almost exha

Method used

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  • Low-voltage LED driving power source

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Embodiment Construction

[0012] In the following, the technical solutions of the present invention are described, illustrated and explained in conjunction with the embodiments of the accompanying drawings.

[0013] A low-voltage LED drive power supply. After the two terminals of the power supply are connected in parallel to the power supply filter capacitor (C1), one end of the power supply filter capacitor (C1) is connected to each end of the base capacitor (C) and the base resistor (R), and then connected to The center tap of the collector winding of the transformer (T), the other end of the base capacitor (C) and the base resistor (R) are connected together, and then connected to the center tap of the base winding of the transformer (T), the transformer (T ) The two ends of the base winding are respectively connected to the bases of the transistors (BG1) and (BG2), so that the base capacitor (C) and the base resistor (R) provide the base bias current of the transistors (BG1) and (BG2) , wherein the...

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Abstract

The invention relates to a low-voltage LED driving power source which comprises a base capacitor (C), a base resistor (R), a power source filter capacitor (C1), triodes (BG1) and (BG2), a transformer (T), diodes (D1) and (D2), an output filter capacitor (C2) and a current-limiting resistor (R1). The whole circuit applies a Royer circuit composed of germanium semiconductor triodes to drive an LED lamp after DC-DC (direct-current to direct-current) conversion. The germanium semiconductor triodes are lowered in saturation voltage, and a switch is low in voltage, so that operating under low voltage can be realized; germanium diodes or Schottky barrier diodes are adopted as output rectifying, so that forward voltage is lowered; and the used annular transformer is small in leakage inductance, so that loss is small, efficiency is high, and the problem of driving low-voltage LED is solved.

Description

technical field [0001] The invention relates to the technical field of LED driving power supply, in particular to a low-voltage LED driving power supply. Background technique [0002] Low-voltage LED drive power, especially very low DC voltage drive power, such as a single Ni-MH battery is only 1.2V, when the battery is almost exhausted, it may only be 0.8V, there are few such dedicated LEDs that work at low voltage Driving power, even if there is one, has very low conversion efficiency. Contents of the invention [0003] In order to solve the low-voltage LED driving problem in the prior art, the present invention provides a low-voltage and high-efficiency LED driving power supply, and proposes the following technical solutions. [0004] 1. A low-voltage LED drive power supply, consisting of base capacitor (C), base resistor (R), power supply filter capacitor (C1), transistor (BG1), (BG2), transformer (T), diode (D1) , (D2), the output filter capacitor (C2), the current ...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 汤乃申汤征宁
Owner 汤征宁