Coupled Inductor Buck Converter On-Time Modulation
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Solution Overview
Problem
Existing regulator circuits in computing systems face challenges with clock latency and subharmonics in multi-phase designs, leading to limited response time to load current changes and increased area consumption and cost due to the use of large capacitors.
Innovation Solution
The system employs inductively coupled inductors with a driver circuit and control circuit to manage charging and discharging periods based on current levels and coupling coefficients, reducing clock latency and subharmonics, and optimizing regulator performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multi-phase regulator designs are used to improve response time to load current changes, then response time is improved, but clock latency and subharmonics increase
Solution Approach 1:
The patent combines multiple inductor windings into a single coupled inductor component, where the inductors share a common magnetic core. This merging approach allows multi-phase operation while reducing clock latency and subharmonics through synchronized magnetic coupling, thereby improving response time without compromising reliability
Solution Approach 2:
The patent implements control circuitry that monitors the coupled inductor currents and adjusts switching signals to maintain synchronized operation. This feedback mechanism ensures that the multi-phase regulator operates without clock latency issues and subharmonics, while maintaining fast response time to load current changes
2Area of stationary object
If large capacitors are used in regulator circuits to reduce area consumption, then area consumption is reduced, but cost increases
Solution Approach 1:
The patent changes the electrical parameters of the regulator circuit by using coupled inductors with specific coupling coefficients and optimized winding configurations. This allows the use of smaller capacitor values while maintaining stable operation, thereby reducing both area consumption and manufacturing cost
3Speed
If coupled inductors with inductive coupling are used to manage charging periods, then response time is enhanced, but device complexity increases
Solution Approach 1:
The patent merges multiple inductor functions into a single coupled inductor component with shared magnetic core and integrated windings. This consolidation reduces device complexity by eliminating separate inductor components while maintaining the fast response time benefits of inductive coupling for managing charging periods
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 approach enhances response time, reduces area consumption, and lowers costs by effectively managing voltage levels and improving regulator performance in computing systems.
Implementation Method 1
a first and a second inductor are inductively coupled to each other
Data Source
AI summary
A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.