Multi-Channel LED Linear Driver Circuit With Integrated Switching and Dimming
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Solution Overview
Problem
Existing LED driver circuits require both a main control chip and an LED drive IC, leading to increased circuit scale and cost.
Innovation Solution
A multi-channel LED linear driver circuit with a switch-triggering loop, dimming drive loop, and output loop, utilizing a single IC to drive multiple LED lights, reducing circuit complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both a main control chip and an LED drive IC are used to drive LED lights, then the LED lights can be effectively driven and controlled, but the circuit scale and circuit cost increase to a great extent
Solution Approach 1:
The patent merges the functions of the main control chip and the LED drive IC into a single integrated driver circuit. This single circuit includes an AC-to-DC conversion module, a DC-to-AC conversion module, a control module, and a drive module, all integrated into one chip that can directly drive multiple LED light strings without requiring separate control and drive ICs.
Solution Approach 2:
The driver circuit is designed with multi-functionality to perform multiple operations within a single integrated circuit. It can simultaneously convert AC to DC, convert DC to AC, control switching, and drive multiple LED channels, replacing what previously required multiple specialized ICs working together.
2Reliability
If both a main control chip and an LED drive IC are used to drive LED lights, then the LED lights can be effectively driven and controlled, but the circuit cost increases to a great extent
Solution Approach 1:
The patent merges the functions of the main control chip and the LED drive IC into a single integrated driver circuit. This single circuit includes an AC-to-DC conversion module, a DC-to-AC conversion module, a control module, and a drive module, all integrated into one chip that can directly drive multiple LED light strings without requiring separate control and drive ICs.
3Device complexity
If a single IC is used to drive multiple LED lights, then the circuit scale and cost are reduced, but the circuit must perform multiple functions including switching control, dimming drive, and power conversion
Solution Approach 1:
The driver circuit is designed with multi-functionality to perform multiple operations within a single integrated circuit. It can simultaneously convert AC to DC, convert DC to AC, control switching, and drive multiple LED channels, replacing what previously required multiple specialized ICs working together.
Solution Approach 2:
The single driver circuit is internally segmented into distinct functional modules: an AC-to-DC conversion module for power rectification, a DC-to-AC conversion module for generating drive waveforms, a control module for managing switching operations, and a drive module for directly controlling LED strings. This modular segmentation allows each function to be performed efficiently while maintaining overall circuit integration.
Data Source
AI summary
A multi-channel light-emitting diode (LED) linear driver circuit, including a switch-triggering loop, a dimming drive loop and an output loop. The switch-triggering loop is configured to detect a triggering situation of an external switch and send a switching control signal according to the triggering situation of the external switch. The dimming drive loop is configured to generate at least two drive signals. The output loop includes at least two output ports respectively connected to the least two drive signals. The switch-triggering loop is connected to the output loop. The switching control signal is configured to control connection or disconnection of each of the at least two output ports.