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High-power efficient power driving circuit for dimming system

A power-driven, high-power technology, applied in the field of aircraft lighting, can solve the problems of serious heat generation, low power supply efficiency, and low driving power, and achieve the effects of small heat generation, large output power, and high power density

Inactive Publication Date: 2015-05-27
SHANGHAI AVIATION ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-power and high-efficiency power supply drive circuit for a dimming system, which solves the problems of low power supply efficiency, low driving power and serious heat generation in the existing dimming drive mode

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Embodiment Construction

[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0009] Such as figure 1 Shown is the functional block diagram of the high-power high-efficiency power supply drive module. The circuit adopts four synchronous switching tubes and inductors, through the state switching of four working modes, the continuous conversion of the boost circuit and the step-down circuit is realized. In this way, a continuously adjustable voltage drive can be output in an environment where the voltage input is unstable. All switch tubes and the internal power supply of the circuit are provided by another voltage regulator chip. The fault protection circuit includes overcurrent overvoltage and undervoltage protection.

[0010] The power chip LTC3780 is used, and the peripheral circuit uses four synchronous switching tubes and inductors to realize the continuous conversion of the boost circuit and the step-down circui...

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Abstract

The invention provides a high-power efficient power driving circuit for a dimming system. The high-power efficient power driving circuit is characterized in that one end of a first switch is connected with an input voltage end; the other end of the first switch is connected with one end of a second switch, the negative electrode of a first diode and one end of an inductor; the other end of the second switch is connected with one end of a third switch and the positive electrode of the first diode respectively; the other end of a third switch is connected with one end of a fourth switch, the positive electrode of a second diode and the other end of the inductor; the other end of the fourth switch is connected with the negative electrode of the second diode and an output adjustable voltage end respectively; the positive electrode of the first diode is further connected with the sampling end of a power chip through a sampling resistor. By the adoption of a switch synchronous rectification technology, compared with the prior art, the high-power efficient power driving circuit has the advantages of high power density, small size, high output power, small heating amount and high adaptability, and dimming can be flexibly selected according to the requirements of different lighting systems.

Description

technical field [0001] The invention relates to aircraft lighting, in particular to a high-power and high-efficiency power supply drive circuit for a dimming system of an aircraft cockpit lighting system. Background technique [0002] Most of the traditional aircraft lighting dimming control systems adopt linear voltage regulation drive mode. With the development of aviation industry, existing domestic and foreign aircraft widely adopt high-efficiency DC / DC power supply drive or PWM drive mode. The high-efficiency DC / DC power supply drive circuit has the advantages of small device size, high efficiency, and high power density, which can well meet the requirements of modern aircraft for dimming systems. [0003] At present, due to the large fluctuation of the input power in the dimming circuit, the voltage-stabilized DC / DC power supply module is unavoidable to meet the dimming brightness requirements at low voltage input, and the current DC / DC power supplies on the market nee...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 邓清余
Owner SHANGHAI AVIATION ELECTRIC
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