Dynamic Power Voltage Adjustment for IC Stability
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Solution Overview
Problem
Highly integrated ICs face challenges in supplying stable power due to increased current consumption and voltage drops, especially with increased switching activity in logic circuits, which can lead to malfunctioning logic circuits.
Innovation Solution
A power supply device with a power voltage selection unit, a power voltage supplier, a switching activity detection unit, and a controller that adjusts the power voltage based on data change degree and current detection to maintain stable power supply, including a register, multiplexor, and current detection unit to dynamically adjust voltage values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of logic circuits is increased to improve IC performance, then processing capability is improved, but current consumption increases causing voltage drops
Solution Approach 1:
The power supply device dynamically adjusts the power voltage based on real-time detection of data switching activity and current consumption. The controller monitors the actual power conditions and changes the voltage level adaptively, transitioning from static voltage supply to dynamic adjustment, resolving the contradiction between high performance and power stability.
Solution Approach 2:
The system implements a feedback mechanism where the detection unit continuously monitors data switching activity and current consumption, feeds this information to the controller, which then adjusts the power voltage accordingly. This closed-loop feedback system ensures that voltage drops caused by increased current consumption are compensated in real-time, maintaining stable power supply despite increased logic circuit density.
2Reliability
If power voltage is increased to compensate for voltage drops, then stable power supply is improved, but energy consumption increases
Solution Approach 1:
Instead of maintaining a constantly high voltage to ensure stability, the system dynamically adjusts voltage levels based on actual demand. When data switching activity is low, voltage is reduced to minimize energy consumption. When activity increases and voltage drops are detected, voltage is increased only to the extent necessary to maintain stability, optimizing the trade-off between reliability and energy loss.
Solution Approach 2:
The system changes the power voltage parameter adaptively based on detected conditions. The controller selects from multiple predetermined voltage values, adjusting the voltage parameter in response to data switching activity and current consumption measurements, thereby maintaining power stability while minimizing unnecessary energy consumption.
3Adaptability or versatility
If multiple discrete logic circuits are driven simultaneously, then IC functionality is improved, but overall current consumption increases causing voltage drops
Solution Approach 1:
The detection unit segments the data bus into multiple sections and independently detects switching activity in each section. This allows the system to identify which specific logic circuits are actively switching and adjust power voltage accordingly, rather than uniformly increasing voltage for the entire IC. This segmented approach maintains functionality of multiple circuits while minimizing unnecessary energy consumption in inactive regions.
Data Source
AI summary
A power supply device for a display device and method for driving the power supply device are disclosed. In one aspect the device includes a power voltage selector configured to select at least one of a plurality of predetermined voltage values according to a power voltage control signal and output the selected predetermined voltage value. The device also includes a power voltage supplier configured to supply a power voltage corresponding to the selected predetermined voltage value to a display data processor and a controller configured to generate the power voltage control signal based at least in part on a change in a number of switched data bits defined as a data change degree. The controller is also configured to transmit the power voltage control signal to the power voltage selector. The data bits are configured to be switched substantially synchronously with a clock signal.