Multi-Stage LED Driver Power Supply for Stable Chip Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driver power supplies for LED lighting experience increased losses due to significant voltage differences and frequency variations, leading to overheating and reliability issues in driving chips, despite the use of APFC and buck converter circuits.
Innovation Solution
A lighting device with a multi-stage chip power supplying mechanism, including a rectifying module, pre-startup module, power factor correction module, voltage converting module, and auxiliary power source module, which operates in a pre-startup mode to stabilize the power factor correction module under varying input voltages and frequencies, ensuring a constant operating voltage for the control chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the power of driver power supplies is reduced to ensure stable luminous flux, then the luminous stability is improved, but the power supply losses in driving chips increase
Solution Approach 1:
The patent segments the power supply function into two independent parts: the main power supply for LED driving and the auxiliary power supply for control chip driving. This segmentation allows each part to be optimized independently, enabling the main power to be reduced for luminous stability while the auxiliary power maintains sufficient levels for chip operation, thereby resolving the contradiction between luminous stability and power supply losses.
Solution Approach 2:
The auxiliary power supply module serves multiple functions: it provides stable operating voltage to the control chip, compensates for voltage drops during startup, and ensures reliable operation across wide input voltage ranges. This multi-functionality allows the system to maintain low power losses in the main supply while ensuring adequate power delivery to control components.
2Adaptability or versatility
If the driver power supply is designed for wide input voltage range, then the adaptability is improved, but the voltage fluctuations for driving chips increase leading to overheating
Solution Approach 1:
The patent separates the power supply path into main power and auxiliary power channels. The auxiliary power supply module specifically serves the control chip with regulated voltage, isolating it from the voltage fluctuations that occur in the main power channel when handling wide input voltage ranges. This segmentation prevents temperature rise in driving chips while maintaining wide input voltage adaptability.
Solution Approach 2:
The auxiliary power supply module acts as an intermediary between the fluctuating main power supply and the control chip. It receives power from the main supply, regulates and stabilizes the voltage, and provides clean, stable power to the control chip, thereby preventing overheating while allowing the system to operate across wide input voltage ranges.
3Illumination intensity
If the APFC circuit and buck converter are used to eliminate flicker, then the light quality is improved, but the complexity of the power supply system increases
Solution Approach 1:
The patent segments the power supply system into distinct functional modules: APFC circuit for power factor correction, buck converter for voltage regulation, and auxiliary power supply for control chip operation. This modular segmentation allows each component to be optimized and controlled independently, managing system complexity while maintaining high light quality through effective flicker elimination.
4Loss of energy
If the power supply voltage is reduced to improve energy efficiency, then the energy consumption is reduced, but the reliability of driving chips deteriorates
Solution Approach 1:
The patent divides the power supply into two independent systems: the main power supply optimized for energy efficiency with lower voltage for LED driving, and the auxiliary power supply ensuring sufficient voltage and power for reliable control chip operation. This segmentation allows the system to achieve low energy consumption in the main path while maintaining high reliability in the control path.
Solution Approach 2:
The auxiliary power supply module provides multiple critical functions: it ensures reliable operation of the control chip, compensates for voltage drops during startup, and maintains stable power delivery across varying operating conditions. This multi-functionality ensures driving chip reliability while the main power supply operates at optimized low voltage for energy efficiency.
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 mechanism reduces power losses and overheating, enhances driving efficiency, and improves reliability by maintaining a stable operating voltage for the control chip, aligning with energy conservation and future development trends while maintaining cost-effectiveness.
Implementation Method 1
The voltage extracting unit converts the driving voltage into an output voltage according to a default converting ratio
Implementation Method 2
The rectifying module generates a rectified voltage
Data Source
AI summary
A lighting device having multi-stage chip power supplying mechanism capable of improving driving efficiency includes a light-emitting module, a rectifying module, a pre-startup module, a power factor correction module, a voltage converting module and an auxiliary power source module. The rectifying module generates a rectified voltage. The pre-startup module receives the rectified voltage to enter on state and converts he rectified voltage into a pre-startup voltage. The power factor correction module receives the pre-startup voltage to enter on state and converts the rectified voltage into a corrected voltage. The voltage converting module converts the corrected voltage into a driving voltage to drive the light-emitting module. The voltage converting module includes a voltage extracting unit for converting the driving voltage into an output voltage according to a default converting ratio. The auxiliary power source module converts the output voltage into an operating voltage to drive the power factor correction module.