Switching Power Converter Startup Timing Control

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Solution Overview

Problem

Conventional switching power converter controllers face challenges in accurately predicting the re-startup timing following a fault condition due to dependence on input voltage variations, leading to potential component stress or damage from repeated fault cycles.

Innovation Solution

Implementing a controller with a slow VCC discharge time that is independent of the input voltage to dominate the re-startup period, using a zener diode to regulate the source voltage and a timer to control the recycling periods, ensuring consistent re-startup timing regardless of input voltage fluctuations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the re-startup period is made shorter to meet user requirements, then productivity is improved, but reliability deteriorates due to component stress from repeated fault cycles

Engineering Contradiction:

Improvere-startup speedVSAvoidcomponent stress

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements dynamic re-startup timing control that adapts the recycling period duration based on the specific fault condition detected. The controller adjusts the timing parameters dynamically rather than using a fixed period, allowing optimization between quick recovery and component protection for different fault scenarios

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The controller continuously monitors fault conditions and uses this feedback to determine appropriate re-startup timing. The system detects fault parameters and adjusts the recycling period accordingly, creating a closed-loop control that balances productivity and reliability based on real-time system state

Inventive Principle:

Principle #23Feedback

2Reliability

If the re-startup period is made longer to prevent component stress, then reliability is improved, but productivity deteriorates due to extended downtime

Engineering Contradiction:

Improvecomponent protectionVSAvoidre-startup time

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system dynamically adjusts the recycling period duration based on fault severity and type. For minor faults, shorter periods maintain productivity, while for severe faults, longer periods protect components, optimizing the balance between reliability and productivity for each specific situation

Inventive Principle:

Principle #15Dynamics

3Device complexity

If conventional VCC recycling control is used, then device complexity is reduced, but measurement precision deteriorates due to inability to accurately predict re-startup timing

Engineering Contradiction:

Improvecontrol circuit simplicityVSAvoidre-startup timing accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The controller implements feedback-based timing control that monitors VCC voltage levels and fault conditions to accurately determine re-startup timing. This feedback mechanism provides precise timing control without requiring complex external circuitry, maintaining simplicity while improving measurement precision

Inventive Principle:

Principle #23Feedback

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 approach allows for a reliable and accurate re-startup period that prevents overstress on switching power converter components, maintaining operational efficiency and user requirements by decoupling re-startup timing from input voltage variations.

Implementation Method 1

using a zener diode to regulate the source voltage

Methodology Applied

Scientific EffectZener breakdown: Avalanche Breakdown

Data Source

PatentUS10084370B2Active startup timing control at fault mode

Publication Date: 2018.09.25 DIALOG SEMICONDUCTOR INC

AI summary

A power switch transistor for a switching power converter is maintained on during a re-startup period by a zener breakdown voltage following a fault condition for the switching power converter. A source voltage from the power switch transistor is used to charge a VCC capacitor that stores a power supply voltage for a controller for the switching power converter.