VR Chip Power Supply Switching to Reduce LDO Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The continuous use of a low dropout regulator (LDO) in a VR chip to convert 54 V to 5 V results in significant power loss and increased chip junction temperature, affecting heat dissipation and reliability in server systems.
Innovation Solution
A power supply method and system that includes inputting an initial input voltage into a voltage regulator and conversion circuit, enabling a logic control unit to generate control signals, and switching between input voltages to minimize power loss by converting to a preset magnitude before supplying power to a load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 54 V to 5 V LDO solution is used in the VR chip to maintain normal work after power-on operation, then the chip can operate normally, but the power loss on the LDO increases to 49 mw and chip junction temperature increases
Solution Approach 1:
The patent applies dynamics by making the input voltage to the LDO adjustable rather than fixed. The system dynamically switches between two input voltage modes (54V and 12V) based on operational requirements, allowing the LDO to operate in a lower loss state during normal operation while maintaining reliability
Solution Approach 2:
The patent changes the voltage parameter of the LDO input by introducing a switching mechanism that can select between 54V and 12V input modes. This parameter change reduces the voltage drop across the LDO from 49V (54V-5V) to 7V (12V-5V), significantly reducing power loss while maintaining the 5V output for chip operation
2Ease of operation
If a 54 V to 5 V LDO solution is used continuously, then the chip can maintain normal operation, but the chip junction temperature increases affecting heat dissipation and working reliability
Solution Approach 1:
The system dynamically adjusts the LDO input voltage based on operational state, switching from 54V during power-on to 12V during normal operation. This dynamic adjustment reduces continuous heat generation at the chip junction, improving heat dissipation while maintaining ease of operation
Solution Approach 2:
The patent converts the potentially harmful continuous high-voltage operation into a beneficial intermittent high-voltage mode. The 54V input is used only temporarily during power-on, then switched to 12V for normal operation, transforming what would be continuous harm into limited, controlled benefit
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
Reduces power consumption and heat dissipation by minimizing LDO conversion losses, improving the reliability and efficiency of the VR chip.
Implementation Method 1
the initial input voltage is converted into a logic control voltage by means of the voltage regulator
Implementation Method 2
the initial input voltage is converted into a voltage with a preset magnitude by the voltage conversion circuit
Data Source
AI summary
Disclosed are a power supply method and system, a computer apparatus and a non-transitory storage medium. The method includes: inputting an initial input voltage into a voltage regulator and a voltage conversion circuit (S1); converting the initial input voltage into a logic control voltage by means of the voltage regulator (S2); enabling a logic control unit by using the logic control voltage, to make the logic control unit generate a first control signal (S3); converting the initial input voltage into a voltage with a preset magnitude by the voltage conversion circuit on the basis of the first control signal, to supply power to a load (S4); and inputting the voltage with the preset magnitude into the voltage regulator, to make the voltage regulator convert the voltage with the preset magnitude into the logic control voltage (S5).