Automatic current-sharing voltage-reducing constant-current driving circuit suitable for two LED light bars

An LED light bar, constant current drive technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve the problem of unacceptable customers and high total voltage of the light bar, and achieve the effect of ensuring working life and ensuring insulation requirements.

Pending Publication Date: 2022-07-22
深圳市东准电子科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] However, the above-mentioned method of connecting LED light strips in series will cause the total voltage of the two LED light strips to be too high, which puts forward higher requirements for circuit insulation and safety, and some customers cannot accept it.

Method used

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  • Automatic current-sharing voltage-reducing constant-current driving circuit suitable for two LED light bars
  • Automatic current-sharing voltage-reducing constant-current driving circuit suitable for two LED light bars
  • Automatic current-sharing voltage-reducing constant-current driving circuit suitable for two LED light bars

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Embodiment Construction

[0018] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0019] like figure 1 As shown, the present invention provides an automatic current sharing step-down constant current driving circuit suitable for two LED light bars, comprising a constant current driving module 1, a first power supply module 2, a second power supply module 3, a switch module 4, The power supply module 5, the energy storage inductor L and the balance transformer T, the first power supply module 2 includes the first filter capacitor C1, the first energy storage winding N1, the first balance winding M1 and the first freewheeling diode D1, and the second power supply module 3 ...

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Abstract

The invention relates to the technical field of LED light bar control, in particular to an automatic current-sharing voltage-reducing constant-current driving circuit suitable for two LED light bars, which comprises a constant-current driving module, a first power supply module, a second power supply module, a switch module, a power supply module and a balancing transformer, and is characterized in that the constant-current driving module is used for controlling the on-off of the switch module; the power supply module charges the energy storage inductors through series connection of two windings of the energy storage inductors in the first power supply module and the second power supply module, and supplies power to the two LED light bars at the same time; when the switch module is switched off, the two windings of the energy storage inductors in the first power supply module and the second power supply module discharge electricity to supply power to the two LED lamp strips respectively, and due to the action of the balancing transformer, the two windings of the energy storage inductors finish discharging at the same time, and therefore it is guaranteed that currents of the two LED lamp strips are equal.

Description

technical field [0001] The invention relates to the technical field of LED light bar control, in particular to an automatic current sharing, step-down and constant current driving circuit suitable for two LED light bars. Background technique [0002] At present, the step-down constant-current drive circuit of LED strips has been widely used in high-voltage and low-current applications, and has the advantages of high efficiency and good EMC. However, due to the fact that the current of each LED strip cannot be equal when the LED strips are connected in parallel, and the LED strips have negative temperature characteristics, the current deviation between the parallel LED strips will become larger and larger, resulting in LED lights with large currents. The strip has the risk of overcurrent burnout, so the buck constant current drive circuit can only drive one LED strip. For the case of controlling two LED light bars, the current method is to connect the two LED light bars in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/345H05B45/36H05B45/3725H05B45/375H02J7/00
CPCH05B45/345H05B45/375H05B45/36H05B45/3725H02J7/0016
Inventor 刘明
Owner 深圳市东准电子科技有限公司
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