Power Circuit Voltage Ramp Control for In-Rush Current Limiting
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Solution Overview
Problem
Semiconductor devices experience excessive in-rush current during power supply, which can damage components and disrupt power delivery, especially when power circuits fail to control this current effectively.
Innovation Solution
The implementation of a power circuit with in-rush current controllers that adjust the input voltage using an increasement voltage with a preset rising rate, ensuring that internal power voltages reach a target level without exceeding safe current ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied to charge capacitors in the semiconductor device, then the capacitors are charged to prevent voltage drop, but excessive in-rush current is generated that can damage components and patterns
Solution Approach 1:
The in-rush current controller is activated before the main power supply to gradually charge the capacitors to a predetermined voltage level. This preliminary charging action prevents the sudden in-rush current that would occur if full power were supplied immediately, while still ensuring capacitors are charged to prevent voltage drop during operation
Solution Approach 2:
The controller dynamically adjusts the voltage level supplied to capacitors during the charging process. By controlling the voltage to rise gradually from zero to a predetermined level rather than applying full voltage immediately, the system prevents excessive in-rush current while maintaining the necessary charge level for voltage stability
2Power
If in-rush current is not controlled, then power voltage may be lowered and power supply to regions may be insufficient, but controlling in-rush current requires additional power circuit components
Solution Approach 1:
The in-rush current controller is integrated into the existing power supply circuitry of the semiconductor device. By merging the in-rush current control functionality with the standard power supply structure, the system achieves power stability without adding separate, complex control circuits, thus maintaining simplicity while ensuring adequate power supply
Data Source
AI summary
A power circuit includes a plurality of regulators and a plurality of in-rush current controllers. The plurality of regulators is coupled to an external power voltage and configured to adjust a level of an input voltage to generate a plurality of internal power voltages. The plurality of in-rush current controllers is configured to provide the input voltage to the plurality of regulators, the input voltage corresponding to an increasement voltage. The increasement voltage has a level rising at a preset rate until the plurality of internal power voltages all reach a target level.