Digital DC-DC Converter With Direct Charging for Fast Load Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital DC-DC voltage conversion apparatuses struggle to rapidly track the operation current of digital core circuits due to limitations in switching speed, leading to fluctuations in output voltage and inability to return to a steady state quickly.
Innovation Solution
Incorporating a direct charging path current supply unit in conjunction with a switching current unit, which generates a direct charging path current to complement the summed current, allowing the apparatus to rapidly adjust output current and maintain a stable output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a switching current unit with multiple switches is used to generate output current, then the output current can be adjusted to track the operation current of the digital core circuit, but the switching speed is limited by the delay of the digital comparator (couple of nanoseconds), which is slower than the abrupt changes in operation current (within a nanosecond)
Solution Approach 1:
The current supply path is segmented into two independent channels: a direct charging path with a single switch for rapid current delivery, and a switching current unit with multiple switches for precise current adjustment. This segmentation allows each path to be optimized for its specific function, resolving the contradiction between speed and control precision.
Solution Approach 2:
The direct charging path is activated in advance during abrupt current changes to immediately supply the required current to the digital core circuit. This preliminary action occurs before the slower switching current unit can respond, ensuring that speed requirements are met without waiting for the comparator delay.
2Stability of the object's composition
If the switching current unit adjusts output current step-by-step through multiple switches, then the output current can be precisely controlled, but the output voltage fluctuates and cannot rapidly return to a steady state during abrupt current changes
Solution Approach 1:
The direct charging path acts as a cushioning mechanism that preemptively supplies current during abrupt changes, preventing output voltage fluctuations before they can occur. This prior cushioning eliminates the need for the switching current unit to make gradual adjustments, thereby rapidly stabilizing the output voltage without time loss.
3Measurement precision
If multiple switches are used in the switching current unit, then the output current can be finely adjusted to match the operation current, but the delay of the digital comparator (couple of nanoseconds) prevents rapid tracking of abrupt current changes (within a nanosecond)
Solution Approach 1:
The direct charging path serves as an intermediary that handles the time-critical function of rapid current delivery, while the switching current unit with multiple switches handles the precision function of fine current adjustment. This intermediary approach allows each component to operate in its optimal performance range without compromising the other.
Data Source
AI summary
A digital DC-DC voltage conversion apparatus is used to convert an input voltage into an output voltage for a digital core circuit and generate an output current for the digital core circuit. The digital DC-DC voltage conversion apparatus includes a direct charging path current supply unit. The direct charging path current supply unit includes a direct charging switch and a direct charging path controller electrically connected to the direct charging switch. A control end of the direct charging switch receives a direct charging switch control signal, and the direct charging path controller generates direct charging switch control signal to control the direct charging switch to generate a direct charging path current to the digital core circuit. In this way, the digital DC-DC voltage conversion apparatus can faster track an operation current of the digital core circuit.