LED Dimming Power Supply Module with Integrated Voltage Stabilization
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Solution Overview
Problem
Conventional LED power modules are cumbersome and costly due to the use of multiple chips and components, and they fail to provide a stable power supply to single-chip microcomputers, especially when operating without a load, resulting in an unstable triangular wave output.
Innovation Solution
A dimming regulated power supply module comprising a control circuit, voltage-stabilizing circuit, and dimming circuit that converts city power into a stable supply voltage for LED light strings, with a voltage-stabilizing circuit generating a first and second voltage to power the single-chip microcomputer and control current according to a pulse-width modulation signal for dimming control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AC-DC circuit with constant current chip is used, then LED power supply is provided, but the power supply becomes unstable triangular wave when no load is present, failing to provide stable power to single-chip microcomputer
Solution Approach 1:
The patent merges the constant current control function and constant voltage output function into a single integrated circuit. The constant current chip simultaneously performs both constant current regulation and constant voltage output, eliminating the need for separate voltage stabilization circuits and reducing overall system complexity while ensuring stable power supply under all load conditions.
2Reliability
If multiple chips and components are used for LED power module design, then LED power supply function is achieved, but the module becomes cumbersome and cost increases sharply
Solution Approach 1:
The constant current chip is designed to perform multiple functions simultaneously: it provides constant current regulation for LED strings, generates stable constant voltage output for single-chip microcomputer, and implements both dimming control and power supply functions. This multi-functionality reduces the total component count and simplifies the overall circuit structure.
Solution Approach 2:
The patent combines previously separate functions (constant current control, constant voltage generation, dimming control) into a single integrated constant current chip, eliminating the need for separate voltage stabilization circuits and reducing the number of external components required.
3Power
If constant voltage chip is used in AC-DC circuit, then power conversion is achieved, but additional conversion circuits are required, increasing complexity
Solution Approach 1:
The patent integrates the constant voltage generation function within the constant current chip itself. The chip internally generates a stable voltage reference and uses it to control the switching and output, eliminating the need for external constant voltage chips or separate voltage conversion circuits while maintaining efficient power conversion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable power supply to single-chip microcomputers and achieves 0-10V dimming control, reducing module size and cost by eliminating the need for constant voltage modules and additional chips, while ensuring a stable and flicker-free power output.
Implementation Method 1
the voltage-stabilizing circuit senses the internal voltage of the control circuit to generate a first voltage and a second voltage, supplies power to the single-chip microcomputer in the dimming circuit after stabilizing the second voltage
Implementation Method 2
the control circuit converts the city power into a supply voltage for supplying power to the LED light string through the output port, wherein the voltage-stabilizing circuit senses the internal voltage of the control circuit
Implementation Method 3
the dimming circuit generates a corresponding pulse-width modulation signal, wherein the control circuit controls the supply current according to the pulse-width modulation signal
Data Source
AI summary
A dimming regulated power supply module comprising a control circuit, a voltage-stabilizing circuit, a dimming circuit, and an output port, wherein the control circuit converts city power into a supply voltage for supplying power to a LED light string through the output port, wherein the voltage-stabilizing circuit senses an internal voltage of the control circuit to generate a first voltage and a second voltage, and supplies power to a single-chip microcomputer in the dimming circuit after stabilizing the second voltage, wherein the voltage-stabilizing circuit outputs the first voltage to set the voltage range of the dimming circuit, wherein the output port transmits the dimming signal output by a dimmer to the dimming circuit, and wherein the dimming circuit generates a corresponding pulse-width modulation signal, wherein the control circuit controls the supply current according to the pulse-width modulation signal, thereby controls the brightness of the LED light string through the output port.