Inductor-Assisted DC-DC Transformer for Adiabatic Charge Transfer
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Solution Overview
Problem
Existing power converters face challenges in efficiently carrying out voltage transformation and adiabatic charge transfer due to the dual function of the regulator, which limits the die area and performance of the converter.
Innovation Solution
The solution involves reducing the functionality of a component that previously handled two functions and relocating it to eliminate one of those functions, while adding a new circuit component to perform the relocated function, thereby increasing the number of components and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the regulator performs both voltage regulation and adiabatic charge transfer functions, then the device complexity is reduced, but the die area required increases and performance efficiency decreases
Solution Approach 1:
The patent divides the regulator into two separate components: a dedicated voltage regulator and a magnetic filter. The voltage regulator handles only voltage regulation while the magnetic filter handles adiabatic charge transfer between capacitors. This segmentation reduces the functional burden on each component, allowing for more efficient layout and reduced die area overall.
Solution Approach 2:
The adiabatic charge transfer function is extracted from the voltage regulator and assigned to a separate magnetic filter component. This extraction allows the voltage regulator to be optimized for its primary function without the added complexity of managing charge transfer timing, while the magnetic filter is specifically designed for adiabatic operation.
2Device complexity
If the regulator performs both voltage regulation and adiabatic charge transfer functions, then the device complexity is reduced, but the power loss increases
Solution Approach 1:
By separating the regulator into two dedicated components, each can be optimized for its specific function. The magnetic filter is designed specifically for adiabatic charge transfer with minimal resistive losses, while the voltage regulator focuses on precise voltage control without the energy-intensive charge transfer management.
Solution Approach 2:
Extracting the adiabatic charge transfer function creates a dedicated magnetic filter that can implement optimized charge transfer paths with lower resistance. The voltage regulator is relieved of the energy-intensive charge transfer operations, reducing its power consumption and heat generation.
3Ease of manufacture
If the regulator performs both voltage regulation and adiabatic charge transfer functions, then ease of manufacture is improved, but voltage transformation efficiency decreases
Solution Approach 1:
The patent segments the voltage transformation process into two distinct stages: adiabatic charge transfer between capacitors (handled by the magnetic filter) and final voltage regulation (handled by the voltage regulator). This segmentation allows each component to operate in its optimal efficiency range, with the charge pump performing bulk voltage transformation and the regulator providing precise final adjustment.
Solution Approach 2:
By extracting the adiabatic charge transfer function, the patent enables the charge pump to operate more efficiently at higher voltage transformation ratios. The magnetic filter handles the charge transfer operations that were previously burdening the regulator, allowing the voltage regulator to focus solely on precision voltage control without compromising overall transformation efficiency.
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 reduces the die area required for the circuit, enhances the performance of the power converter by allowing more efficient voltage transformation within the charge pump, and reduces power losses by optimizing the placement of components.
Implementation Method 1
promote adiabatic charge transfer among the capacitors within the charge pump
Implementation Method 2
The inductor in this regulator performs two functions. One is to control the output voltage of the converter
Data Source
AI summary
In a power converter, a switching network having switches that operate at a common frequency and duty cycle interconnects circuit elements. These circuit elements include capacitors that are in a capacitor network and a magnetic filter. When connected to the capacitors by a switch from the switching network, the magnetic filter imposes a constraint upon inter-capacitor charge transfer between the capacitors to maintain the filter's second terminal at a voltage. The switching network transitions between states. These states include a first state, a second state, and a third state. In both the first state and the third state, the first magnetic-filter terminal couples to the capacitor network. In the second state, which occurs between the first and third state, the switches ground the first magnetic-filter terminal.