Switching Regulator Driving Device with Synchronized Capacitor Selection
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Solution Overview
Problem
Switching regulators experience delays in responding to output voltage and current changes due to energy accumulation during light-out periods, leading to extended times for output voltage and current to reach target values.
Innovation Solution
A driving device and light-emitting device configuration that includes capacitors and selectors to alternately close and open circuits of loads and capacitors, synchronizing operations to prevent energy accumulation and ensure rapid response during load selection periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a light-out period is provided between load-selected periods, then the circuit for the output of the switching regulator is opened, but energy accumulated in circuit elements such as inductors is not absorbed, leading to an increase in output voltage and delay in response
Solution Approach 1:
A third capacitor is introduced as an intermediary component to absorb excess energy from the inductor during light-out periods. This third capacitor acts as a mediator that receives energy from the inductor when the main output capacitor is disconnected, preventing voltage spikes and enabling faster response when the load is reconnected.
Solution Approach 2:
The third capacitor is pre-charged during light-out periods by absorbing energy from the inductor before the next load selection. This preliminary energy storage prevents energy loss and ensures the circuit is ready for immediate response when the load is reconnecte
2Adaptability or versatility
If the output current of a switching regulator is switched for each load in synchronization with load selection, then different currents are supplied to individual loads, but the response delay extends the period required for output voltage and current to reach target values
Solution Approach 1:
The capacitor system is segmented into a main output capacitor and a third capacitor, with each serving distinct functions. The main capacitor serves the active load while the third capacitor handles energy absorption during light-out periods, allowing independent optimization of both load serving and energy management functions.
Solution Approach 2:
The third capacitor operates periodically by charging during light-out periods and discharging during load-selected periods. This periodic charge-discharge cycle synchronizes with the load selection timing, ensuring energy is available exactly when needed to maintain fast response.
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
This configuration prevents delays in output voltage and current responses, allowing for immediate stabilization at target values upon load selection, enabling high-speed switching between emission and light-out periods.
Implementation Method 1
a first capacitor connected to an output of the power source; a second capacitor connected to the output of the power source
Implementation Method 2
a switching regulator (switching power source or DC-DC converter), serving as a power source, is a circuit that converts a DC input voltage to a DC output voltage through a turning on/off operation of a switching element
Data Source
AI summary
A driving device includes a power source that converts input power to output power, first and second capacitors connected to an output of the power source, a load selector, and a capacitor selector. The load selector opens/closes circuits of first and second loads connected to the output of the power source to alternately close these circuits such that the second-load circuit is closed after the opening of the first-load circuit. The capacitor selector opens/closes circuits of the first and second capacitors to alternately close these circuits such that the first-capacitor circuit is closed in synchronization with the closing of the first-load circuit, and such that the second-capacitor circuit is closed in synchronization with the closing of the second-load circuit. The capacitor selector opens the first-capacitor circuit after the opening of the first-load circuit.