Power Supply Control Circuit for Variable Input Rise Timing
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Solution Overview
Problem
Existing power supply systems in memory systems face challenges in efficiently managing power transitions, leading to voltage drops and fluctuations due to sudden changes in input voltage, which can disrupt the operation of electronic components.
Innovation Solution
A power supply control circuit that includes a power supply IC with a load switch and power supply control unit to adjust the output start timing of voltages based on the rising time of the input voltage, using delay times that vary depending on the input voltage's change duration, ensuring stable power supply to components like NAND memory and DRAM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply control circuit uses a fixed delay time for output start timing, then the circuit structure is simple, but voltage drops and fluctuations occur due to sudden input voltage changes
Solution Approach 1:
The patent applies dynamics by making the delay time variable rather than fixed. The power supply control circuit dynamically adjusts the delay time based on the rising time of the input voltage. When the input voltage rises quickly, a longer delay time is applied; when it rises slowly, a shorter delay time is used. This dynamic adjustment prevents voltage drops and fluctuations while maintaining system reliability.
Solution Approach 2:
The patent changes the parameter of delay time based on the rising time characteristic of the input voltage. By monitoring how long it takes for the input voltage to rise from 0V to its target value, the circuit selects an appropriate delay time from multiple predetermined values. This parameter change approach resolves the contradiction by adapting the control parameter to match the actual power supply conditions.
2Reliability
If the power supply control circuit adjusts output start timing based on input voltage rising time, then power supply stability is improved, but the control mechanism becomes more complex
Solution Approach 1:
The patent applies preliminary action by measuring the rising time of the input voltage before determining the output start timing. The circuit预先 (in advance) captures the rising time characteristic and uses this information to select the appropriate delay time before the actual power output begins. This preliminary measurement and decision-making process ensures voltage stability without requiring complex real-time adjustments during power delivery.
Solution Approach 2:
The patent uses the rising time measurement as an intermediary parameter between the input voltage and the output start timing control. Instead of directly controlling the output based on instantaneous voltage conditions, the circuit uses the measured rising time as an intermediate variable to select from predetermined delay times. This intermediary approach simplifies the control mechanism while maintaining reliability.
3Reliability
If the power supply control circuit uses multiple predetermined delay times, then voltage fluctuations are prevented, but the circuit configuration becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the delay time control into multiple discrete predetermined values (first predetermined delay time, second predetermined delay time, etc.). Each delay time value corresponds to different rising time conditions of the input voltage. This segmentation allows the circuit to handle different power supply scenarios with simple, pre-defined control options rather than requiring continuous or complex calculations.
Solution Approach 2:
The patent changes the delay time parameter based on the measured rising time of the input voltage. By having multiple predetermined delay time values stored in the circuit, the system can switch between different parameter values depending on the actual power supply conditions. This parameter change strategy prevents voltage fluctuations while keeping the circuit configuration manageable through pre-defined options.
Data Source
AI summary
A power supply circuit includes an input circuit configured to receive a supply of an input voltage, an output circuit configured to output at least one first output voltage based on the input voltage, and a power supply control circuit configured to control the output circuit so as to change an output start timing of the first output voltage according to a length of a time period during which the input voltage changes from a first voltage to a second voltage.