Dynamic Reference Voltage Generation for Fast Load Transients
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Solution Overview
Problem
Existing power supply systems face challenges in accurately controlling output voltage, particularly during fast transient load changes, leading to undershoot or overshoot due to component response delays, which can cause malfunctions or damage in sensitive loads like microprocessors.
Innovation Solution
A fast transient response power supply system is implemented, comprising power supply circuitry, voltage reference circuitry, and dynamic reference generation circuitry, where the dynamic reference generation circuitry generates a dynamic reference voltage based on the output and reference voltages, enabling precise control and reducing resistance to voltage changes, especially during dynamic voltage scaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If observer circuitry is used to provide fast transient response, then transient response speed is improved, but adaptability to dynamic voltage scaling deteriorates
Solution Approach 1:
The patent applies dynamics by making the reference voltage adaptive rather than fixed. The reference voltage dynamically adjusts based on the difference between the actual output voltage and the target voltage, allowing the system to respond to both transient changes and intentional voltage scaling operations. This resolves the contradiction by enabling the system to be both fast-responsive and adaptable to changing operating conditions.
Solution Approach 2:
The patent changes the parameter of reference voltage from a static value to a dynamically adjusted value. The reference voltage is modified based on the voltage error (difference between actual and target output voltage), which allows the system to maintain fast transient response while simultaneously adapting to dynamic voltage scaling operations without resistance.
2Manufacturing precision
If feedback loops are used to improve output voltage accuracy, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the actual output voltage is continuously monitored and compared to the target voltage. The difference (error) is used to dynamically adjust the reference voltage, creating a closed-loop control system that improves output voltage accuracy while maintaining relatively simple circuitry through efficient use of the feedback signal.
Data Source
AI summary
The present disclosure is directed to a fast load transient response power supply system using dynamic reference voltage generation. A system may comprise, for example, at least power supply circuitry, voltage reference circuitry and dynamic reference generation circuitry. The power supply circuitry may be configured to generate an output voltage (e.g., for driving a load) based on a power supply input voltage. The voltage reference circuitry may be configured to generate a reference voltage for use in controlling the generation of the output voltage. The dynamic reference generation circuitry may be configured to generate a dynamic reference voltage as the input voltage for the power supply circuitry based on the reference voltage and the output voltage.