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Double channel LED driver and control method therefor

A LED driver, dual-channel technology, applied in the direction of light sources, electrical components, lighting devices, etc., can solve the problems of bulky, complex structure, high cost, etc.

Active Publication Date: 2016-11-16
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Obviously, the above-mentioned technical solution using two power levels has complex structure, bulky volume and high cost

Method used

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  • Double channel LED driver and control method therefor
  • Double channel LED driver and control method therefor
  • Double channel LED driver and control method therefor

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Embodiment Construction

[0018] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0019] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in on...

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Abstract

The invention discloses a double channel LED driver and a control method therefor. The double channel LED driver comprises a power converter, an output current calculator, an error amplifier, a logic control and drive circuit, a first dimming switch and a second dimming switch. The double channel LED driver receives a first dimming signal and a second dimming signal provided by a wireless control module, adjusts total current of a first channel LED and a second channel LED according to the first dimming signal, and adjusts the dimming ratios of the first channel LED and a second channel LED according to the second dimming signal.

Description

technical field [0001] The present invention relates to an electronic circuit, and more specifically, the present invention relates to a dual-channel LED (light emitting diode) driver and a control method thereof. Background technique [0002] With the continuous development of technology, LED is gradually replacing the application of fluorescent lamps in liquid crystal display backlight and general lighting due to its small size, simple driving, energy saving and environmental protection. LEDs need a driver circuit to provide them with a controlled current signal. In some applications, in addition to the controlled LED current, some power supply voltages such as 12V, 5V, 3.3V are required for other modules (such as microcontroller MCU, wireless control module RF, routers, etc.) )powered by. [0003] The existing dual-channel LED drive circuit usually uses two power stages: the first power stage includes such as a flyback converter to provide two constant voltages, one of ...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37H05B45/50H05B45/10H05B45/3725H05B45/385
Inventor 邝乃兴王凯
Owner CHENGDU MONOLITHIC POWER SYST
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