A LED lighting drive current linear adjustment and dimming control circuit

Abstract

The present invention provides a LED lighting drive current linear adjustment and dimming control circuit. The LED lighting driving current linear adjustment and dimming control circuit includes an AC power supply module, an LED module, a driver IC, a dimming control module and a linear current adjustment module. When the input voltage increases, the linear current adjustment module can control the current flowing through the LED module to decrease, so as to achieve the balance of input power, and then improve its linear adjustment rate; Change the internal reference voltage of the driver IC to change the current of the LED module, and cooperate with the maintenance current drive part to open and close the maintenance current path, so that it can be applied to thyristor dimming applications, and the structure is compatible with 0‑10V And PWM (Pulse Width Modulation; Pulse Width Modulation) drive mode, which can improve applicability.

Description

technical field [0001] The invention relates to a linear adjustment and dimming control circuit of LED lighting driving current. Background technique [0002] Generally, when driving linear LED lighting, the industry basically only pays attention to the control of the lamp bead current. When they are combined with a thyristor dimmer, an additional dimming control IC is needed, which not only becomes complicated in structure, but also increases the cost. In addition, when the external power supply voltage fluctuates and rises, its LED lamp beads and driver IC will withstand high-voltage shocks, which will cause device damage and reduce circuit reliability. Contents of the invention [0003] The present invention aims at solving one of the above technical problems at least to a certain extent or at least providing a useful commercial choice. For this reason, the object of the present invention is to propose a LED lighting drive current linear adjustment and dimming control...

AI Technical Summary

Problems solved by technology

[0002] Generally, when driving linear LED lighting, the industry basically only pays attention to the control of the lamp bead current. When they are combined with a thyristor dimmer, an additional dimming control IC is needed, which not only becomes complicated in structure, but also increases the cost

In addition, when the external power supply voltage fluctuates and rises, its LED lamp beads and driver IC will withstand high voltage impact, which will cause device damage and reduce circuit reliability

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