RCC LED Driver with Voltage-Feedback Current Stabilization
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Solution Overview
Problem
Existing LED drivers using Ringing Choke Converters (RCC) face significant challenges in maintaining a constant output current, leading to fluctuations and inefficiencies.
Innovation Solution
The proposed LED driver system incorporates a main circuit and driving circuit of an RCC, along with first and second adjustment modules, which adjust the driving signal based on input voltage to stabilize the output current, and includes a rectifier, shielding module, and filter to reduce electromagnetic interference and ripples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple RCC circuit structure is used, then device complexity is reduced and manufacturing cost decreases, but output current fluctuates greatly and manufacturing precision deteriorates
Solution Approach 1:
The patent introduces a feedback mechanism where the driving signal is adjusted based on the input voltage to maintain constant output current. The driving circuit monitors the operating conditions and modifies the driving signal accordingly, creating a closed-loop control system that resolves the contradiction between simple structure and precise current control.
Solution Approach 2:
The patent makes the driving signal dynamic by adjusting it according to input voltage variations. Instead of using a fixed driving signal, the system adapts the driving parameters in real-time to maintain stable output current, transforming a static simple circuit into a dynamic controlled system.
2Adaptability or versatility
If input voltage varies, then adaptability improves, but output current stability deteriorates without adjustment
Solution Approach 1:
The driving circuit uses feedback control to detect input voltage variations and adjusts the driving signal accordingly. This feedback mechanism enables the system to adapt to different input voltages while maintaining stable output current, resolving the contradiction between adaptability and stability.
Solution Approach 2:
The patent changes the parameters of the driving signal (such as frequency, amplitude, or pulse width) in response to input voltage variations. By dynamically adjusting these parameters, the system maintains constant output current across different input voltage conditions, achieving both adaptability and stability.
Data Source
AI summary
A driver for a Light Emitting Diode (LED) comprises a main circuit of a Ringing Choke Converter (RCC), a driving circuit of the RCC, and a first adjustment module. The main circuit of the RCC comprises: an energy input terminal, an energy output terminal, and a control terminal. The energy input terminal is configured to receive an input voltage. The energy output terminal is coupled to the LED and configured to provide an output current to the LED. The control terminal is configured to receive a driving signal. The driving circuit comprises a driving signal output terminal coupled to the control terminal, and is configured to provide the driving signal to the main circuit via the driving signal output terminal. The first adjustment module is coupled between the energy input terminal and the driving signal output terminal, and is configured to adjust the driving signal according to the input voltage.