Two-Stage Power Regulator for Transient Load Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power regulation systems struggle to maintain stable voltage levels during large transient loads, particularly in applications like RF transmission and portable computing, where the input source may not be able to support the instantaneous power demands, leading to output voltage sag and performance degradation.
Innovation Solution
The implementation of a high-density power regulator system with minimal capacitor size, which includes an input capacitor, an output capacitor, a first regulator for voltage conversion, a second regulator for energy storage, and an energy storage element that delivers energy to maintain output voltage regulation during high load conditions, using a two-stage power conversion approach to reduce capacitor size while ensuring efficient power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-stage voltage regulator is used to provide stable output voltage, then voltage regulation is achieved, but the regulator cannot support large transient power demands when the input source is constrained
Solution Approach 1:
The power regulation system is divided into two independent regulator stages: a first voltage regulator for continuous voltage conversion and a second voltage regulator for transient power supplementation. This segmentation allows each regulator to specialize in different functions, with the second regulator specifically handling transient power demands when the load exceeds the first regulator's capability.
Solution Approach 2:
The second regulator is configured to detect when the load current exceeds the first regulator's power capability and preemptively supplies additional power from its energy storage element. This preliminary action prevents output voltage sag before it occurs by anticipating transient power demands.
2Power
If large capacitors are used to support transient power demands, then transient power capability is improved, but the overall regulator size and cost increase
Solution Approach 1:
The energy storage function is segmented from the main output capacitor and assigned to a separate second regulator with its own energy storage element. This allows the main output capacitor to be minimized while the second regulator's energy storage element handles transient power supplementation, reducing overall capacitor size.
Solution Approach 2:
The second regulator acts as an intermediary between the constrained input source and the high-power load during transient conditions. It uses its energy storage element to bridge the power gap, allowing the system to support transient power demands without requiring large capacitors in the main regulation path.
3Reliability
If the input power is constrained by a predetermined limit, then power source reliability is maintained, but the regulator cannot meet instantaneous high power demands of the load
Solution Approach 1:
The second regulator stores energy in advance in its energy storage element during periods when the load is within the first regulator's capability. When the load suddenly increases, this pre-stored energy is immediately deployed to meet the instantaneous power demand without violating the input power constraint.
Solution Approach 2:
The system discards the constraint limitation during transient periods by having the second regulator supply additional power from its energy storage element. After the transient period, the system recovers by recharging the second regulator's energy storage element from the constrained input source, maintaining long-term compliance with the power limit.
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 effectively supports large transient applications with reduced capacitor sizes, maintaining output voltage stability and efficiency, while minimizing overall regulator size and cost, even in space-constrained devices like wireless cards and cell phones.
Implementation Method 1
an energy storage element coupled to the second regulator, where the second regulator delivers energy from the energy storage element to the first regulator to maintain regulation of an output voltage
Data Source
AI summary
Methods and circuits for power supply arrangement and control are disclosed herein. In one embodiment, a power supply can include: (i) an input capacitor coupled to an input terminal that is coupled to a power source, where the power source provides power that is constrained by a predetermined limit; (ii) an output capacitor coupled to an output terminal that is coupled to a load, where the load has a first load condition or a second load condition; (iii) a first regulator to convert an input voltage at the input terminal to an output voltage at the output terminal to power the load; (iv) a second regulator coupled to the first regulator; and (v) an energy storage element coupled to the second regulator, where the second regulator delivers energy from the energy storage element to the first regulator to maintain regulation of an output voltage at the output terminal when in the second load condition.