Multi-Frequency DC/DC Converter for IVR Efficiency and Regulation
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Solution Overview
Problem
Current high-performance computing systems face challenges in overcoming conduction losses and voltage gradients due to high current densities, and integrated voltage regulators (IVRs) suffer from low efficiency and thermal stress, limiting power delivery and compute performance.
Innovation Solution
A DC/DC converter with multiple parallel switching frequencies, where one path operates at a lower frequency for high efficiency and another at a higher frequency for tight regulation accuracy, using different inductor topologies and feedback loops to manage current delivery and voltage regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high switching frequency is used in IVR, then regulation accuracy during high current transient events is improved, but efficiency deteriorates and thermal stress increases
Solution Approach 1:
The patent implements dynamic frequency switching where the IVR transitions between a first switching frequency (higher) and a second switching frequency (lower) based on real-time operating conditions. When transient events requiring tight regulation are detected, the system operates at the higher frequency; during steady-state conditions, it switches to the lower frequency to minimize losses and thermal stress.
Solution Approach 2:
The system dynamically changes the switching frequency parameter of the voltage regulator based on load conditions and regulation requirements. This parameter adjustment allows the system to optimize between regulation accuracy and efficiency by selecting appropriate frequency levels matching the operational demands.
2Power
If high current density is used to increase power delivery, then compute performance is improved, but conduction losses and voltage gradients increase
Solution Approach 1:
The patent employs periodic switching action at optimized frequencies to deliver power efficiently. By using pulsed switching rather than continuous high current flow, the system reduces conduction losses while maintaining effective power delivery through controlled periodic energy transfer to the load.
3Reliability
If IVR is integrated into device package to reduce PCB and package bump currents, then current density issues are addressed, but efficiency deteriorates
Solution Approach 1:
The integrated voltage regulator implements dynamic frequency adjustment to optimize its performance. By transitioning between different switching frequencies based on operational conditions, the IVR maintains current density management benefits while minimizing efficiency losses through intelligent frequency selection matching the actual power delivery requirements.
Data Source
AI summary
The disclosed voltage regulator includes multiple voltage converter circuits. Each of the voltage converter circuits can be configured to operate at respective switching frequencies to deliver current to an output supply voltage. The voltage regulator can include a control circuit that regulates the output supply voltage using the voltage converter circuits. Various other methods and systems are also disclosed.