Switching Voltage Regulator Dynamic Frequency Control
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Solution Overview
Problem
Typical voltage regulators lack efficiency in providing power supplies for a wide range of power operations and multiple power domains in integrated chips, as they maintain a static switching frequency across all domains.
Innovation Solution
An integrated switching voltage regulator (SVR) that dynamically adjusts both the bridge driver strength and switching frequency based on P-states and C-states, using a lookup table to optimize power delivery and minimize losses across different power domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static switching frequency is used across all power domains, then the device complexity is reduced, but the energy efficiency deteriorates
Solution Approach 1:
The patent implements dynamic switching frequency adjustment by monitoring power domain states (P-states and C-states) and selecting appropriate switching frequencies from multiple available frequencies. The controller dynamically changes the switching frequency based on the operational state of each power domain, transforming the static frequency system into a dynamic adaptive system that optimizes efficiency for different operating conditions.
Solution Approach 2:
The patent changes the switching frequency parameter based on power domain states. The controller selects from multiple predefined switching frequencies (e.g., first switching frequency for active states, second switching frequency for idle states) and adjusts this parameter dynamically, allowing the system to optimize power efficiency by matching the switching frequency to the operational requirements of each power domain.
2Loss of energy
If different switching frequencies are used for different power domains, then the energy efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent segments the power management control by dividing the system into multiple power domains, each with its own operational state monitoring and switching frequency selection. The controller is segmented into multiple control units or logic blocks that independently manage different power domains, allowing each domain to have optimized switching frequencies without creating a monolithic complex control system.
Solution Approach 2:
The patent implements feedback mechanisms where the controller monitors the operational states (P-states and C-states) of power domains and uses this feedback information to automatically select appropriate switching frequencies. This closed-loop feedback system simplifies the overall control complexity by using state-based decision logic rather than requiring complex manual tuning or external control for each frequency transition.
3Productivity
If the switching frequency is dynamically adjusted, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-defining multiple switching frequencies and their corresponding optimal power domain states before operation. The controller has a predefined mapping or lookup table that associates specific P-states and C-states with optimal switching frequencies, eliminating the need for complex real-time calculations during operation and simplifying the control logic while maintaining high productivity.
Solution Approach 2:
The patent makes the switching frequency dynamic and adaptive to power domain operational states. By continuously monitoring P-states and C-states and automatically adjusting the switching frequency accordingly, the system achieves high power delivery efficiency (productivity) while the dynamic adaptation is managed through relatively simple state-based control logic rather than complex algorithms.
Data Source
AI summary
Described herein is an integrated circuit which comprises: a switching voltage regulator (SVR), having one or more bridge drivers, to provide regulated power supply to a plurality of power domains; and a power control unit (PCU) operable to adjust switching frequencies of the SVR according to states of the plurality of power domains, wherein drive strength or active phase count of the one or more bridge drivers is also adjusted by a logic unit of the SVR when the switching frequencies of the SVR are adjusted.