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An embedded intelligent constant current driver and its control method

A constant current driver and embedded chip technology, applied in energy-saving control technology, lighting devices, light sources, etc., can solve the problems of complex constant current control circuits, waste of resources, and insufficient utilization of embedded chips, and achieve a wide range of applications and avoid damage, the effect of a simple circuit

Active Publication Date: 2014-10-15
深圳市益力盛电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the embedded chip is underutilized, causing a waste of resources and making the entire constant current control circuit complicated.

Method used

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  • An embedded intelligent constant current driver and its control method
  • An embedded intelligent constant current driver and its control method
  • An embedded intelligent constant current driver and its control method

Examples

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Embodiment Construction

[0036] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0037] Such as Figure 4 As shown, this implementation example includes a rectification and filtering module, a zero point detection module, a DC-DC conversion module, an overcurrent protection module and an embedded control module. It can realize functions such as communication with the host, digital tube display, LED flashing control, button dimming and remote control.

[0038] The two outputs of the commercial power are respectively connected to the corresponding two input terminals of the rectification and filtering circuit. At the same time, the live wire terminal L of the mains power is connected to the input terminal of the zero point detection module, and the zero point signal of the mains power is transmitted to an I / O port P0 of the embedded chip (there are many types of optional chips, here we take the 51 single-chip microcomputer as an example). 2. ...

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Abstract

The invention relates to an intelligent constant-current driver realized by an embedded chip and a control method of the intelligent constant-current driver. The intelligent constant-current driver realized by the embedded chip is characterized by comprising a rectifying filter module, a null-point detecting module, a DC (direct current)-DC conversion module, an overcurrent protection module, a double-limit-current control module, an MOS (metal oxide semiconductor) tube driving module, an embedded intelligent control module and a function extension module based on the embedded chip. The constant-current driver is large in input range, high in efficiency, upgradable, simple in circuit structure, adjustable in output current and rich in extended functions, and is an intelligent constant-current control system. Meanwhile, when the load is an LED array, light dimming, color changing and flickering control and the like can be realized by the system. Therefore, the intelligent constant-current driver can be used for realizing devices for LED lighting, LED alarm lamps and LED displaying and the like.

Description

technical field [0001] The invention belongs to an intelligent constant current driver scheme and a control method thereof, and mainly relates to an embedded intelligent constant current driver and a control method thereof. Background technique [0002] At present, there are two main control methods for constant current driving of PWM (Pulse Width Modulation) switches, which are voltage-type PWM switch constant-current control and current-type PWM switch constant-current control. [0003] The basic working principle of PWM switch constant current control is: when the system input voltage, internal parameters and external load change, the constant current control circuit performs closed-loop feedback adjustment according to the difference between the sampled output current signal and the reference signal. Since the frequency of the PWM signal is constant, it is only necessary to adjust the conduction time of the switching device of the main circuit within one cycle to control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/48Y02B20/40
Inventor 贺宏锟王林博石雷阳金金
Owner 深圳市益力盛电子有限公司
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