Self-adaptive constant current device
An adaptive, constant current control technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of high flicker index of the system and the inability to maintain a constant system current
Pending Publication Date: 2019-07-19
SHENZHEN SUNMOON MICROELECTRONICS
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Problems solved by technology
For example, in the field of LED dimming, when the line network voltage changes or the parameters of the filter capacitor change, the system current cannot be maintained at the preset constant current value, and the flicker index of the system will become higher
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[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0038] see figure 1 , figure 1 A schematic structural diagram of an adaptive constant current device provided for an embodiment of the present invention, wherein the adaptive constant current device includes: a detection module 11, an energy storage module 12, a voltage regulation module 13 and a constant current control module 14;
[0039] The detection module 11 is connected to the light-emitting diode device and the energy storage module 12 respectively, and is used to detect that the current in the light-emitting diode device is in a non-constant current state and send an energy stora...
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The invention relates to a self-adaptive constant current device. The self-adaptive constant current device comprises a detection module, an energy storage module, a voltage regulation module and a constant current control module; the detection module is correspondingly connected with a light emitting diode device and the energy storage module and is used for detecting a non-constant current stateof an electric current in the light emitting diode device and sending energy storage control signals to the energy storage module; the energy storage module is connected with the voltage regulation module and is used for performing charging and discharging and controlling the voltage regulation module to extract the electric current according to the energy storage control signals; the voltage regulation module is connected with the constant current control module and is used for extracting the electric current in a reference electric current source so as to regulate the reference voltage of the constant current control module; and the constant current control module is connected with the light emitting diode device and is used for regulating an upper limit value of the electric current the light emitting diode device to enable the electric current of light emitting diodes to maintain within a constant range. By changing the upper limit value of the electric current of the light emitting diode device, the electric current of the light emitting diode device is limited within a certain constant current range, and then the flicker index is reduced.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of electronic circuits, in particular to an adaptive constant current device. Background technique [0002] In the control system of electronic circuits, when the peripheral parameters of the system change, if the constant current threshold of the system remains unchanged, obvious current ripples will appear in the circuit. For example, in the field of LED dimming, when the line network voltage changes or the parameters of the filter capacitor change, the system current cannot be maintained at the preset constant current value, and the flicker index of the system will become higher. Contents of the invention [0003] Based on this, it is necessary to provide an adaptive constant current device to solve the problems in the prior art. [0004] Detection module, energy storage module, voltage regulation module and constant current control module; [0005] The detection module is respec...
Claims
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Login to View More IPC IPC(8): G05F1/46G05F1/565
CPCG05F1/461G05F1/565
Inventor 尹志刚郭伟峰李照华郭东剑
Owner SHENZHEN SUNMOON MICROELECTRONICS