Power Supply Conversion Circuit with Voltage Clamping and Boost Modules
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Solution Overview
Problem
Conventional power supply conversion methods, such as LDOs, are complex and occupy large chip areas, making them costly and inefficient for providing multiple output power supplies, especially for analog integrated circuits with low power requirements.
Innovation Solution
A power supply conversion circuit comprising a first voltage clamping module, a boost module, a second voltage clamping module, a filter module, and multiple output modules, which can generate multiple output power supplies by decreasing and increasing input voltage, maintaining target voltage within a range, filtering ripples, and efficiently supplying power to loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LDO is used for power supply conversion, then output voltage precision is improved, but device complexity and chip area increase
Solution Approach 1:
The patent replaces the complex LDO with a simpler voltage clamp circuit using basic components (resistors, capacitors, diodes) that can be easily disposed of or replaced. This voltage clamp structure achieves sufficient voltage regulation without the need for complex bandgap references and feedback loops, thereby reducing device complexity while maintaining acceptable output voltage precision for non-critical applications.
Solution Approach 2:
The patent extracts only the essential voltage regulation function from the LDO, removing unnecessary components such as the bandgap voltage reference, error amplifier, and complex compensation circuits. By keeping only the core voltage clamping mechanism with simple RC networks, the design achieves voltage regulation with significantly reduced complexity and chip area.
2Measurement precision
If LDO is used for power supply conversion, then output voltage precision is improved, but chip area occupation increases
Solution Approach 1:
The patent replaces the area-intensive LDO with a compact voltage clamp circuit using minimal passive components. The voltage clamp structure requires only a few resistors, capacitors, and diodes, occupying significantly less chip area while providing sufficient voltage regulation for applications where extreme precision is not required.
Solution Approach 2:
The patent removes the large-area components of the LDO, particularly the bandgap reference circuit and compensation capacitors, retaining only the essential voltage clamping function. This extraction reduces chip area occupation dramatically while maintaining acceptable voltage regulation performance.
3Adaptability or versatility
If multiple LDOs are arranged to provide multiple output power supplies, then power supply versatility is improved, but chip area occupation increases
Solution Approach 1:
The patent designs a universal voltage clamp circuit that can generate multiple output voltages by simply changing the clamp voltage references and RC time constants. This single multi-functional circuit structure can provide different voltage levels (e.g., 1.8V, 3.3V, 5V) without requiring separate LDOs for each voltage, thereby achieving power supply versatility with minimal chip area occupation.
Solution Approach 2:
The patent merges multiple voltage regulation functions into a single integrated circuit structure. By combining multiple voltage clamp circuits with shared components (such as common input voltage, shared filtering stages, and integrated output control), the design achieves multiple output power supplies with reduced total chip area compared to using separate LDOs for each voltage level.
4Measurement precision
If LDO is used for power supply conversion, then output voltage precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses inexpensive, easily manufactured components such as standard-value resistors, capacitors, and diodes in the voltage clamp circuit. These components are cheaper and easier to manufacture than the precision components required for LDOs, thereby reducing overall manufacturing cost while providing sufficient voltage regulation for non-critical applications.
Solution Approach 2:
The patent removes the expensive precision components from the LDO design, particularly the bandgap reference circuit and precision feedback network. By retaining only the basic voltage clamping function with standard passive components, the manufacturing cost is significantly reduced while maintaining acceptable voltage precision for applications where extreme accuracy is not required.
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
The proposed circuit provides multiple output power supplies with a simple and expandable structure, reducing chip area occupation and costs, while ensuring safe and stable voltage delivery to analog integrated circuits.
Implementation Method 1
The first voltage clamping module is configured to decrease an input voltage to a preset low voltage
Implementation Method 2
The boost module is configured to increase the input voltage or the preset low voltage to a target voltage
Implementation Method 3
The second voltage clamping module is configured to maintain the target voltage within a preset voltage range
Implementation Method 4
The filter module is configured to filter out ripples in the target voltage
Data Source
AI summary
A power supply conversion circuit is provided, which includes: a first voltage clamping module configured to decrease an input voltage to a preset low voltage; a boost module configured to increase the input voltage or the preset low voltage to a target voltage; a second voltage clamping module configured to maintain the target voltage within a preset voltage range; a filter module configured to filter out ripples in the target voltage; and at least one output module, each of which is configured to supply power to a load. Compared with a conventional LDO integrated circuit, the circuit can provide multiple output power supplies, and it is only required to additionally arrange one field effect transistor for one more output power supply. Therefore, the power supply conversion circuit has a simple structure, is expandable easily and is applicable to an analog integrated circuit requiring multiple output power supplies.