Integrated Overvoltage Protection Circuit for System-on-Chip
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional overvoltage protection control circuits, which require a separate chip, increase the cost and size of systems and limit integration, as they fail to effectively suppress the deterioration of digital logic circuits when a voltage of 6 V or more is applied.
Innovation Solution
An overvoltage protection control circuit integrated into a system on chip (SOC) using a voltage conversion circuit, a voltage comparison circuit, and a switching circuit, which includes BJT diodes and a resistance ladder to convert and compare voltages, determining whether to apply the power supply voltage to the chip based on these comparisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an overvoltage protection control circuit is implemented as a separate chip, then the protection function is provided, but the cost and size of the system increase
Solution Approach 1:
The patent integrates the overvoltage protection control circuit directly into the SOC chip, merging previously separate protection functionality with the main system chip. This eliminates the need for a separate protection chip, thereby reducing overall system size while maintaining the overvoltage protection function.
2Reliability
If an overvoltage protection control circuit is implemented as a separate chip, then the protection function is provided, but the unit price of the chip increases
Solution Approach 1:
By combining the overvoltage protection control circuit with the SOC chip into a single integrated device, the patent eliminates the need for separate chips and their associated assembly costs. This integration reduces the total component count and manufacturing complexity, thereby lowering the unit price while maintaining protection functionality.
3Reliability
If an overvoltage protection control circuit is implemented as a separate chip, then the protection function is provided, but the integration of the system is limited
Solution Approach 1:
The patent achieves full integration by incorporating the overvoltage protection control circuit directly into the SOC chip architecture. This allows the protection function to be seamlessly integrated with the main system, enabling better adaptability and versatility in system design without being constrained by separate chip interfaces and connections.
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 solution reduces the unit price and layout area of the chip by integrating the overvoltage protection functions within the SOC, effectively preventing the application of overvoltage to digital logic circuits and maintaining reliability.
Implementation Method 1
The first voltage generator may include a plurality of BJT diodes corresponding to the level of the first voltage
Implementation Method 2
The second voltage generator may include a resistance ladder formed of two resistors connected in series
Data Source
AI summary
An overvoltage protection control circuit includes a voltage conversion circuit, a voltage comparison circuit, and a switching circuit. The voltage conversion circuit generates a first voltage and a second voltage based on a power supply voltage. The voltage comparison circuit generates a control signal based on a comparison between the first voltage and the second voltage. The switching circuit determines whether to apply the power supply voltage to a chip in response to the control signal. The overvoltage protection control circuit is formed inside the chip.