Multi-Level Over-Current Protection Circuit for Dynamic Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power supplier systems cannot continuously output high energy under varying load conditions, particularly due to increasing dynamic loads in CPUs, and lack the capability to handle multiple sets of output with multi-level current protection and time delay settings.
Innovation Solution
A multi-level over-current protection circuit is designed, comprising a signal amplification circuit, comparison circuit, and time delay counting circuit, which compares detection signals with multiple reference signals and adjusts count values to activate protection modes at different time delays, allowing for progressive protection levels and time delays tailored to dynamic load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single-point current protection is used, then the protection circuit is simple, but it cannot handle multiple sets of output with varying load conditions
Solution Approach 1:
The protection circuit is segmented into multiple independent protection levels (first protection level with first reference signal and first time delay, second protection level with second reference signal and second time delay). Each segment handles specific current ranges and time requirements, allowing the circuit to manage multiple output sets with different load conditions while maintaining manageable complexity through modular design
Solution Approach 2:
The protection circuit is designed with multi-functionality to handle both single-point and multi-level protection requirements. The same circuit structure can accommodate different reference signals and time delay values, making it universally applicable to various output configurations and load conditions without requiring completely separate protection circuits for each case
2Reliability
If single protection time delay is used, then the control is simple, but it cannot provide progressive protection levels for dynamic load conditions
Solution Approach 1:
The protection circuit implements dynamic control through multiple time delay values (first time delay greater than second time delay) that can be adjusted based on load conditions. This dynamic approach allows the circuit to provide progressive protection levels - longer delays for lower current thresholds and shorter delays for higher thresholds - enhancing reliability while maintaining reasonable control complexity through systematic design
Solution Approach 2:
The circuit utilizes parameter changes by varying reference signal values and time delay values across different protection levels. The first reference signal has a different value than the second reference signal, and each is paired with a corresponding time delay parameter. This systematic parameter variation enables progressive protection levels that adapt to dynamic load conditions without requiring complex control logic
3Adaptability or versatility
If multi-level protection with multiple reference signals is implemented, then progressive protection levels are achieved, but the circuit complexity increases
Solution Approach 1:
The comparison functionality is segmented into distinct comparison stages, each comparing the detection signal against a specific reference signal (first reference signal, second reference signal). This segmentation allows the circuit to achieve progressive protection levels with customized reference values while managing complexity by organizing comparisons in a structured, modular fashion rather than requiring a single complex comparison mechanism
Data Source
AI summary
A multi-level over-current protection circuit includes: a signal amplification circuit configured to receive a set of detection signals and output a first signal; a comparison circuit to compare the first signal with a first reference signal and a second reference signal respectively; and a time delay counting circuit. The time delay counting circuit adjusts a first count value when the first signal is higher than or equal to the first reference signal and smaller than the second reference signal, and the time delay counting circuit activates a protection mode when the first count value reaches a first protection time delay. The time delay counting circuit adjusts a second count value when the first signal is higher or equal to the second reference signal, and activates the protection mode when the second count value reaches a second protection time delay.